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Magnetic resonance imaging tracing of superparamagnetic iron oxide nanoparticle-labeled mesenchymal stromal cells for repairing spinal cord injury
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作者 Xiaoli Mai Yuanyuan Xie +12 位作者 Zhichong Wu Junting Zou Jiacheng Du Yunpeng Shen Hao Liu Bo Chen Mengxia Zhu Jiong Shi Yang Chen Bing Zhang Zezhang Zhu Bin Wang Ning Gu 《Neural Regeneration Research》 2026年第5期2031-2039,共9页
Mesenchymal stromal cell transplantation is an effective and promising approach for treating various systemic and diffuse diseases.However,the biological characteristics of transplanted mesenchymal stromal cells in hu... Mesenchymal stromal cell transplantation is an effective and promising approach for treating various systemic and diffuse diseases.However,the biological characteristics of transplanted mesenchymal stromal cells in humans remain unclear,including cell viability,distribution,migration,and fate.Conventional cell tracing methods cannot be used in the clinic.The use of superparamagnetic iron oxide nanoparticles as contrast agents allows for the observation of transplanted cells using magnetic resonance imaging.In 2016,the National Medical Products Administration of China approved a new superparamagnetic iron oxide nanoparticle,Ruicun,for use as a contrast agent in clinical trials.In the present study,an acute hemi-transection spinal cord injury model was established in beagle dogs.The injury was then treated by transplantation of Ruicun-labeled mesenchymal stromal cells.The results indicated that Ruicunlabeled mesenchymal stromal cells repaired damaged spinal cord fibers and partially restored neurological function in animals with acute spinal cord injury.T2*-weighted imaging revealed low signal areas on both sides of the injured spinal cord.The results of quantitative susceptibility mapping with ultrashort echo time sequences indicated that Ruicun-labeled mesenchymal stromal cells persisted stably within the injured spinal cord for over 4 weeks.These findings suggest that magnetic resonance imaging has the potential to effectively track the migration of Ruicun-labeled mesenchymal stromal cells and assess their ability to repair spinal cord injury. 展开更多
关键词 acute spinal cord injury diffusion tensor imaging dynamic migration mesenchymal stromal cells neural function neuronal regeneration quantitative susceptibility mapping repairability ruicun superparamagnetic iron oxide nanoparticle
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Cerium Oxide Nanoparticles Alleviate Enhanced UV-B Radiation-Induced Stress in Wheat Seedling Roots by Regulating Reactive Oxygen Species 被引量:1
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作者 Cheng Sun Chen Zhao +2 位作者 Guohua Wang Qianwen Mao Rong Han 《Phyton-International Journal of Experimental Botany》 2025年第2期455-479,共25页
Enhanced UV-B radiation represents a major environmental factor impacting global cereal production.Researchers have explored various approaches to reduce the detrimental impact of UV-B radiation on crops.Recently,engi... Enhanced UV-B radiation represents a major environmental factor impacting global cereal production.Researchers have explored various approaches to reduce the detrimental impact of UV-B radiation on crops.Recently,engineered nanoparticles,particularly cerium oxide nanoparticles(CeO_(2)-NPs),have attracted widespread interest for their ability to boost plant tolerance to a range of abiotic stresses.This study investigates how CeO_(2)-NPs application affects the morphology,physiology,biochemistry,and transcriptomics profiles of wheat seedling roots subjected to enhanced UV-B stress.The findings demonstrate that CeO_(2)-NPs notably promoted root length,fresh and dry weights,and root activity(p<0.05)under enhanced UV-B stress.CeO_(2)-NP treatment reduced the content of hydrogen peroxide<(H_(2)O_(2))and malondialdehyde(MDA)in wheat,alleviating oxidative damage in seedling roots and partially restoring the root phenotype.Under non-UV-B stress conditions,CeO_(2)-NP treatment triggered the difference of 237 transcripts in plants relative to the control group.Under enhanced UV-B stress,CeO_(2)-NP treatment exhibited differentially expressed genes(DEGs)linked to the antioxidant defense mechanism responsible for reactive oxygen species(ROS)scavenging,compared to the non-nanoparticle control.This suggests that ROS scavenging may be a key mechanism by which CeO_(2)-NPs enhance wheat resistance to enhanced UV-B radiation.This study elucidates a potential molecular mechanism through which CeO_(2)nanoparticles may enhance wheat tolerance to UV-B stress. 展开更多
关键词 Cerium oxide nanoparticles UV-B stress ROS scavenging transcriptomics analysis
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Modulation of oxidative damage and genotoxicity of biosynthesized zinc oxide nanoparticles via supplementation with modified cinnamaldehyde-loaded chitosan nanoparticles in mice
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作者 Mosaad A.Abdel-Wahhab Aziza A.El-Nekeety +4 位作者 Asmaa S.Salman Zeinab K.Hamza Engy M.Akl Soher E.Aly Wenyi Kang 《Food Science and Human Wellness》 2025年第9期3414-3427,共14页
Synthesis of zinc oxide nanoparticles(ZnO-NPs)via green method is an outstanding alternative to conventional/regular methods;however,the safety or toxicity of the biosynthesized ZnO-NPs in vivo is not fully explored.T... Synthesis of zinc oxide nanoparticles(ZnO-NPs)via green method is an outstanding alternative to conventional/regular methods;however,the safety or toxicity of the biosynthesized ZnO-NPs in vivo is not fully explored.This study was conducted to evaluate the protective efficiency of cinnamaldehyde-loaded chitosan nanoparticles(Cin@CSNPs)against oxidative damage and genotoxicity of ZnO-NPs in mice.ZnO-NPs were biosynthesized using the extract of fresh leaves of Mentha pulegium L.Cin was extracted from cinnamon essential oil,and was loaded into chitosan nanoparticle(Cin@CSNPs).Both ZnO-NPs,Cin@CSNPs and CSNPs were characterized.The in vitro release of Cin@CSNPs was determined.In the biological study,6 groups of male BALB/c mice were treated by gavage for 3 weeks as follows,control group,the group received ZnO-NPs(25 mg/kg b.w),the groups received Cin@CSNPs at low dose(50 mg/kg b.w)or high dose(100 mg/kg b.w),and the groups received ZnO-NPs plus Cin@CSNPs at the 2 tested doses.Blood and tissue samples were collected for different biochemical,genetical and histological studies.The particle size of ZnO-NPs,CSNPs,and Cin@CSNPs were(20.78±2.60),(170.0±3.7),and(218.23±2.90)nm,andξ-potential were(32.7±4.6),(8.32±0.27)and(4.80±0.21)mV,respectively.ZnO-NPs disturbed the biochemical and oxidative stress indices,AFP,CEA,TNF-α,chromosomal aberrations in somatic and germ cells,and sperm abnormality along with severe pathological changes in the hepatic,renal,and testicular tissues.Cin@CSNPs improved significantly all the parameters tested and the histological picture in a dose-dependent.Therefore,the biosynthesized ZnO-NPs exhibit oxidative damage and genotoxicity,and Cin@CSNPs have potential protective effects against the risks of ZnO-NPs and may be a promising tool to overcome the challenges of using Cin in food and pharmaceuticals applications. 展开更多
关键词 Zinc oxide nanoparticles CINNAMALDEHYDE Chitosan nanoparticles Dietary supplement GENOTOXICITY DNA fragmentation
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Unveiling the Selective Oxidation Mechanism of a Low Cr Alloy with Surface Spraying Oxide Nanoparticles of hcp Structure
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作者 Hang Ding Juanjuan Liang +3 位作者 Xin Luo Song Tang Yun Xie Xiao Peng 《Acta Metallurgica Sinica(English Letters)》 2025年第12期2125-2133,共9页
This study systematically explored the oxidation behavior of a Ni-10Cr alloy without and with surface spraying hexagonal closed pack(hcp)-structuredα-Al_(2)O_(3)orα-Fe_(2)O_(3)nanoparticles.Despite the distinct equi... This study systematically explored the oxidation behavior of a Ni-10Cr alloy without and with surface spraying hexagonal closed pack(hcp)-structuredα-Al_(2)O_(3)orα-Fe_(2)O_(3)nanoparticles.Despite the distinct equilibrium dissociation oxygen partial pressure of the two kinds of oxide nanoparticles,they both contributed to the selective oxidation of Ni-10Cr alloy,achieving the transition from internal Cr oxidation to external Cr_(2)O_(3)scale formation.Nano-scaled characterization indicates that a coherent interface was developed between the newly grown Cr_(2)O_(3)grains and the hcp-structured oxide nanoparticles,whereby promoting epitaxial Cr_(2)O_(3)nucleation surrounding the nanoparticles and kinetically accelerating the formation of a continuous Cr_(2)O_(3)scale at the transient oxidation stage.The findings provide new insights into the selective oxidation mechanism of alloys with low Cr contents. 展开更多
关键词 nanoparticles Selective oxidation High temperature oxidation Low Cr alloy
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Zinc oxide nanoparticles synthesized with Berberis vulgaris L.ameliorate cyclophosphamide-induced nephrotoxicity in rats
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作者 Reza Mohammadian Nader Goodarzi +1 位作者 Mohsen Akbaribazm Hadi Cheraghi 《Asian Pacific Journal of Tropical Biomedicine》 2025年第4期158-168,共11页
Objective:To examine the protective effects of green-synthesized zinc oxide nanoparticles with Berberis vulgaris L.fruit aqueous extract(BVZnONPs)on cyclophosphamide(CP)-induced nephrotoxicity in Wistar rats.Methods:3... Objective:To examine the protective effects of green-synthesized zinc oxide nanoparticles with Berberis vulgaris L.fruit aqueous extract(BVZnONPs)on cyclophosphamide(CP)-induced nephrotoxicity in Wistar rats.Methods:35 Adult male Wistar rats were divided into 5 groups:normal,BVZnONPs(20 mg/kg),CP(100 mg/kg),and 2 co-treatment groups receiving CP with BVZnONPs(10 and 20 mg/kg).All treatments were administered intraperitoneally for 28 days.Serum levels of antioxidant enzymes(catalase,superoxide dismutase,glutathione peroxidase,nitric oxide)and kidney function parameters(creatinine,total protein,blood urea nitrogen)were measured.The expressions of p53 and Bcl-2 proteins were assessed via immunohistochemical assay while kidney volume and substructures were estimated stereologically.Results:CP induced nephrotoxicity with significant increases(P<0.05)in nitric oxide,creatinine,and blood urea nitrogen levels,and decreases(P<0.05)in catalase,superoxide dismutase,and glutathione peroxidase levels.It also increased p53 protein expression and decreased Bcl-2 protein expression.Treatment with BVZnONPs significantly increased(P<0.05)antioxidant enzyme levels and decreased nitric oxide levels in the 20 mg/kg group compared to CP.Blood urea nitrogen and creatinine levels were significantly reduced in the BVZnONPs-treated groups,with greater effects at 20 mg/kg.However,total protein serum levels were not significant(P>0.05)in the BVZnONPs-treated groups compared to CP.Conclusions:These findings suggest that BVZnONPs can mitigate CP-induced nephrotoxicity,likely due to their antioxidant and anti-apoptotic properties,though longer treatment duration may be necessary for tissue-level improvements. 展开更多
关键词 nanoparticle Berberis vulgaris L Barberry KIDNEY Zinc oxide CHEMOTHERAPY
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Magnetic iron oxide nanoparticles: An emerging threat for the environment and human health
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作者 Hang Yang Lin Liu +9 位作者 Zhao Shu Weican Zhang Cha Huang Yanhuan Zhu Si Li Weichao Wang Gang Li Qinghua Zhang Qian Liu Guibin Jiang 《Journal of Environmental Sciences》 2025年第6期188-202,共15页
Magnetic iron oxide nanoparticles(Fe_(x)O_(y) NPs,mainly Fe3O4 andγ-Fe2O_(3))are nanomaterials ubiquitously present in aquatic,terrestrial,and atmospheric environments,with a high prevalence and complex sources.Over ... Magnetic iron oxide nanoparticles(Fe_(x)O_(y) NPs,mainly Fe3O4 andγ-Fe2O_(3))are nanomaterials ubiquitously present in aquatic,terrestrial,and atmospheric environments,with a high prevalence and complex sources.Over the past decade,numerous reports have emerged on the presence of exogenous particles in human body,facilitated by the rapid development of separation and detection methods.The health risk associated with magnetic Fe_(x)O_(y) NP have garnered escalating attention due to their presence in human blood and brain tissues,especially for their potential association with neurodegenerative diseases like Alzheimer’s disease.In this paper,we provide a comprehensive overview of sources,analysis methods,environmental impacts,and health risks of magnetic Fe_(x)O_(y) NP.Currently,most researches are primarily based on engineered Fe_(x)O_(y) NP,while reports aboutmagnetic Fe_(x)O_(y) NP existing in real-world environments are still limited,especially for their occurrence levels in various environmental matrices,environmental transformation behavior,and biotoxic effects.Our study reviews this emerging pollutant,providing insights to address current research deficiencies and chart the course for future studies. 展开更多
关键词 Magnetic nanoparticle Iron oxide Air pollutant Health risk MAGNETITE
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Regulation and enhancement of the optical performance of graphene oxide through Ni/Fe/Ag nanoparticles doping
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作者 Qingqing Sun Bing Dong +3 位作者 Ying Song Jianshi Wang Mengzhi Yan Zongwei Xu 《Nanotechnology and Precision Engineering》 2025年第2期132-145,共14页
Graphene oxide(GO)is a two-dimensional carbon material with a graphene-like structure and many oxygen-containing functional groups,and in recent years from research into the unique optical properties of GO,GO-based co... Graphene oxide(GO)is a two-dimensional carbon material with a graphene-like structure and many oxygen-containing functional groups,and in recent years from research into the unique optical properties of GO,GO-based composite materials formed by combining with other materials have shown improved overall performance.Reported here is an investigation of how doping with Ni,Fe,and Ag nanoparticles affects the linear and nonlinear optical properties of GO films.The morphology and structure of films of GO,GO with Ni nanoparticles,GO with Fe nanoparticles,and GO with Ag nanoparticles were studied by laser scanning confocal microscopy,SEM,energy dispersive spectroscopy,XRD,and Raman spectroscopy.UV-visible absorption spectra were used to study the optical absorption properties,and the optical band gaps of GO and the composites were calculated from those spectra via Tauc plots.The results show that the band gaps of GO films can be effectively regulated by metal nanoparticles,and so the properties of GO composites can be manipulated.The nonlinear optical properties of GO and GO-metal-nanoparticle composite films were studied by femtosecond laser Z-scanning.The results show that the femtosecond laser power can be tuned to the optical limiting behavior of GO.The strong synergistic coupling effect between metal nanoparticles and GO enhances the nonlinear absorption and nonlinear refraction of composite thin films.The nonlinear absorption coefficient of the composite thin films is improved significantly,and the optical limiting properties are excellent.GO-metal-nanoparticle composite materials have potential applications and advantages in improving optical absorption,band-gap control,and optical limiting.They can promote the expansion of GO composite materials in various practical applications and are candidates for good optical materials,opening the way to GO photonics. 展开更多
关键词 Graphene oxide Metal nanoparticle Linear absorption Nonlinear optics
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A highly sensitive electrochemical sensor based on poly(3-aminobenzoic acid)/graphene oxide-gold nanoparticles modified screen printed carbon electrode for paraquat detection
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作者 Dechnarong Pimalai Thitirat Putnin Suwussa Bamrungsap 《Journal of Environmental Sciences》 2025年第2期139-150,共12页
Herein,a modified screen printed carbon electrode(SPCE)based on a composite material,graphene oxide-gold nanoparticles(GO-AuNPs),and poly(3-aminobenzoic acid)(P3ABA)for the detection of paraquat(PQ)is introduced.The m... Herein,a modified screen printed carbon electrode(SPCE)based on a composite material,graphene oxide-gold nanoparticles(GO-AuNPs),and poly(3-aminobenzoic acid)(P3ABA)for the detection of paraquat(PQ)is introduced.The modified electrode was fabricated by drop casting of the GO-AuNPs,followed by electropolymerization of 3-aminobenzoic acid to achieve SPCE/GO-AuNPs/P3ABA.The morphology and microstructural characteristics of the modified electrodes were revealed by scanning electron microscopy(SEM)for each step of modification.The composite GO-AuNPs can provide high surface area and enhance electroconductivity of the electrode.In addition,the presence of negatively charged P3ABA notably improved PQ adsorption and electron transfer rate,which stimulate redox reaction on the modified electrode,thus improving the sensitivity of PQ analysis.The SPCE/GOAuNPs/P3ABA offered a wide linear range of PQ determination(10^(−9)-10^(−4) mol/L)and low limit of detection(LOD)of 0.45×10^(−9) mol/L or 0.116μg/L,which is far below international safety regulations.The modified electrode showed minimum interference effect with percent recovery ranging from 96.5%to 116.1%after addition of other herbicides,pesticides,metal ions,and additives.The stability of the SPCE/GO-AuNPs/P3ABA was evaluated,and the results indicated negligible changes in the detection signal over 9 weeks.Moreover,this modified electrode was successfully implemented for PQ analysis in both natural and tapped water with high accuracy. 展开更多
关键词 PARAQUAT Electrochemical sensor Graphene oxide(GO) Gold nanoparticle(AuNP) Poly(3-aminobenzoic acid)(P3ABA)
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Preparation of Superparamagnetic Dextran-coated Iron Oxide Nanoparticles used as a Novel Gene Carrier into Human Bladder Cancer Cells' 被引量:1
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作者 曹正国 周四维 +1 位作者 刘继红 宋晓东 《The Chinese-German Journal of Clinical Oncology》 CAS 2005年第3期183-186,191,共5页
Objective: Application of magnetic nanoparticles as gene carrier in gene therapy has developed quickly. This study was designed to investigate the preparation of superparamagnetic dextran-coated iron oxide nanoparticl... Objective: Application of magnetic nanoparticles as gene carrier in gene therapy has developed quickly. This study was designed to investigate the preparation of superparamagnetic dextran-coated iron oxide nanoparticles (SDION) and the feasibility of SDION used as a novel gene carrier for plasmid DNA in vitro. Methods: SDION were prepared by chemical coprecipitation and separated by gel filtration on Sephacryl S-300HR, characterized by TEM, laser scattering system and Vibrating Sample Magnetometer Signal Processor. The green fluorescent protein (pGFP-C2) plasmid DNA was used as target gene. SDION-pGFP-C2 conjugate compounds were produced by means of oxidoreduction reaction. The connection ratio of SDION and pGFP-C2 DNA was analyzed and evaluated by agarose electrophoresis and the concentration of pGFP-C2 in supernatant was measured. Using liposome as control, the transfection efficiency of SDION and liposome was respectively evaluated under fluorescence microscope in vitro. Results: The diameter of SDION ranges from 3 nm to 8 nm, the effective diameter was 59.2 nm and the saturation magnetization was 0.23 emu/g. After SDION were reasonably oxidized, SDION could connect with pGFP-C2 to a high degree. The transfection efficiency of SDION as gene carrier was higher than that of liposome. Conclusion: The successes in connecting SDION with pGFP-C2 plasmid by means of oxidoreduction reaction and in transferring pGFP-C2 gene into human bladder cancer BIU-87 cells in vitro provided the experimental evidence for the feasibility of SDION used as a novel gene carrier. 展开更多
关键词 iron oxide magnetic nanoparticles SUPERPARAMAGNETIC gene carrier TRANSFECTION
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Toxicity and mechanisms of action of titanium dioxide nanoparticles in living organisms 被引量:9
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作者 Jing Hou Luyao Wang +4 位作者 Chunjie Wang Songlin Zhang Haiqiang Liu Shiguo Li Xiangke Wang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2019年第1期40-53,共14页
Titanium dioxide nanoparticles(TiO_2 NPs) are one of the most widely used nanomaterials in the consumer products, agriculture, and energy sectors. Their large demand and widespread applications will inevitably cause d... Titanium dioxide nanoparticles(TiO_2 NPs) are one of the most widely used nanomaterials in the consumer products, agriculture, and energy sectors. Their large demand and widespread applications will inevitably cause damage to organisms and ecosystems. A better understanding of TiO_2 NP toxicity in living organisms may promote risk assessment and safe use practices of these nanomaterials. This review summarizes the toxic effects of TiO_2 NPs on multiple taxa of microorganisms, algae, plants, invertebrates, and vertebrates. The mechanism of TiO_2 NP toxicity to organisms can be outlined in three aspects: The Reactive Oxygen Species(ROS)produced by TiO_2 NPs following the induction of electron–hole pairs; cell wall damage and lipid peroxidation of the cell membrane caused by NP-cell attachment by electrostatic force owing to the large surface area of TiO_2 NPs; and TiO_2 NP attachment to intracellular organelles and biological macromolecules following damage to the cell membranes. 展开更多
关键词 TiO2 nanoparticles PARTICLE size EXPOSURE oxidATIVE stress LIVING ORGANISMS
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Recent advances of cerium oxide nanoparticles in synthesis, luminescence and biomedical studies: a review 被引量:10
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作者 何立莹 苏玉民 +1 位作者 蒋兰宏 石士考 《Journal of Rare Earths》 SCIE EI CAS CSCD 2015年第8期791-799,共9页
Nanostructured cerium oxide (CeO2) commonly known as nanoceria is a rare earth metal oxide, which plays a technologically important role due to its versatile applications as antomobile exhaust catalysts, oxide ion c... Nanostructured cerium oxide (CeO2) commonly known as nanoceria is a rare earth metal oxide, which plays a technologically important role due to its versatile applications as antomobile exhaust catalysts, oxide ion conductors in solid oxide fuel cells, electrode materials for gas sensors, ultraviolet absorbents and glass-polishing materials. However, nanoceria has little or weak luminescence, and therefore its uses in high-performance luminescent devices and biomedical areas are limited. In this review, we present the recent advances of nanoceria in the aspects of synthesis, luminescence and biomedical studies. The CeO2 nanoparticles can bc synthesized by solution-based methods including co-precipitation, hydrothemlal, microemulsion process, sol-gel techniques, combustion reaction and so on. Achieving controlled morphologies and enhanced luminescence efficiency of nanoceria particles arc quite essential for its potential energyand environment-related applications. Additionally, a new fiontier for nanoccria particles in biomedical research has also been opened, which involves low toxicity, retinopathy, biosensors and cancer therapy aspects. Finally, the summary and outlook on the challenges and perspectives of the nanoceria particles are proposed. 展开更多
关键词 cerium oxide nanoparticlE controlled synthesis LUMINESCENCE BIOMEDICAL rare earths
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Preparation of ultrafine Ce-based oxide nanoparticles and their catalytic performances for diesel soot combustion 被引量:11
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作者 韦岳长 赵震 +3 位作者 焦金庆 刘坚 段爱军 姜桂元 《Journal of Rare Earths》 SCIE EI CAS CSCD 2014年第2期124-130,共7页
The ultrafine Ce-based oxide nanoparticles with different element dopings (Zr, Y) were synthesized by the method of mi- cropores-diffused coprecipitation (MDC) using ammonia solution as the precipitation agent. Th... The ultrafine Ce-based oxide nanoparticles with different element dopings (Zr, Y) were synthesized by the method of mi- cropores-diffused coprecipitation (MDC) using ammonia solution as the precipitation agent. The activities of the catalysts for soot oxidation were evaluated by the temperature-programmed oxidation (TPO) reaction. Ce-based oxides prepared in this study exhibited high catalytic activity for soot oxidation under tile condition of loose contact between soot particles and catalysts, and the catalytic ac- tivity ofultrafine Ce0.gZr0 iO2 nanoparticle for soot combustion was the highest, whose/"10, Ts0 and Sco2m was 364, 442 ~C and 98.3%, respectively. All catalysts were systematically characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brumauer-Emett-Teller (BET), Fourier transform infrared spectroscopy (FT-IR) and UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS). It was indicated that the MDC method could prepare the ultrafine Ce-bascd oxide nanoparticles whose the crystal lattice were perfect, and the BET surface area and average crystal size of the ultrafine nanoparticles changed with the different element dopings (Zr, Y). The H2-TPR measurements showed that the ultrafine Ce-based ox- ide nanoparticles with the doping-Zr cation could be favorable for improving the redox property of the catalysts. 展开更多
关键词 ultrafine nanoparticles Ce-based oxides catalysts soot combustion micropores-diffused coprecipitation rare earths
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Thin-film transistor processed from zinc source solution filled zinc oxide nanoparticle layer
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作者 SUN Yuying TANG Yuanxin +1 位作者 LIN Shaopeng LI Chensha 《黑龙江大学工程学报(中英俄文)》 2025年第2期15-21,共7页
Here,a preparation of stable,non-toxic,transparent,high performance zinc oxide thin-film semiconductor via thermal processing of composite system of zinc source solution filled zinc oxide nanoparticles layer was repor... Here,a preparation of stable,non-toxic,transparent,high performance zinc oxide thin-film semiconductor via thermal processing of composite system of zinc source solution filled zinc oxide nanoparticles layer was reported.The zinc oxide nanocrystals synthesized through the thermolysis of Zn-oleate complex in organic solvent medium were first deposited on the ATO/ITO/glass substrate and treated by annealing,then the zinc source solution was deposited on the zinc oxide nanoparticle layer to form precursor thin film by spin-coating process.The thin film transistor with well-controlled and densely packed nanocrystals in zinc oxide semiconductor layer was obtained by thermal annealing the system of precursor film coated ATO/ITO/glass substrate.By optimizing the fabrication conditions,the fabricated thin film transistors exhibited superior field-effect property and carrier mobility property,their saturation mobility reached 2.17 cm^(2)·V^(-1)·s^(-1),which was more than twice as high compared to the transistor devices coated only by zinc oxide nanoparticles.Our method of fabricating zinc oxide thin film transistors was simple,high efficiency,and feasible for the batch production with low cost. 展开更多
关键词 zinc oxide nanoparticlE thin-film transistor SOL-GEL solution-process
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Microbial synthesis of zinc oxide nanoparticles and their potential application as an antimicrobial agent and a feed supplement in animal industry: a review 被引量:8
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作者 Hidayat Mohd Yusof Rosfarizan Mohamad +1 位作者 Uswatun Hasanah Zaidan Nor’Aini Abdul Rahman 《Journal of Animal Science and Biotechnology》 SCIE CAS CSCD 2019年第4期851-872,共22页
In recent years, zinc oxide nanoparticles(ZnO NPs) have gained tremendous attention attributed to their unique properties. Notably, evidence has shown that zinc is an important nutrient in living organisms. As such, b... In recent years, zinc oxide nanoparticles(ZnO NPs) have gained tremendous attention attributed to their unique properties. Notably, evidence has shown that zinc is an important nutrient in living organisms. As such, both prokaryotes and eukaryotes including bacteria, fungi and yeast are exploited for the synthesis of ZnO NPs by using microbial cells or enzyme, protein and other biomolecules compounds in either an intracellular or extracellular route. ZnO NPs exhibit antimicrobial properties, however, the properties of nanoparticles(NPs) are depended upon on their size and shape, which make them specific for various applications. Nevertheless, the desired size and shape of NPs can be obtained through the optimization process of microbes mediated synthesis by manipulating their reaction conditions. It should be noted that ZnO NPs are synthesized by various chemical and physical methods.Nonetheless, these methods are expensive and not environmentally friendly. On that account, the microbes mediated synthesis of ZnO NPs have rapidly evolved recently where the microbes are cleaner, eco-friendly, nontoxic and biocompatible as the alternatives to chemical and physical practices. Moreover, zinc in the form of NPs is more effective than their bulk counterparts and thus, they have been explored for many potential applications including in animals industry. Notably, with the advent of multi-drug resistant strains, ZnO NPs have emerged as the potential antimicrobial agents. This is mainly due to their superior properties in combating a broad spectrum of pathogens. Moreover, zinc is known as an essential trace element for most of the biological function in the animal’s body. As such, the applications of ZnO NPs have been reported to significantly enhance the health and production of the farm animals. Thus, this paper reviews the biological synthesis of ZnO NPs by the microbes, the mechanisms of the biological synthesis, parameters for the optimization process and their potential application as an antimicrobial agent and feed supplement in the animal industry as well as their toxicological hazards on animals. 展开更多
关键词 ANIMALS ANTIMICROBIAL FEED SUPPLEMENT MICROBIAL synthesis NANOTECHNOLOGY Zinc oxide nanoparticles
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Determination of the mechanism of photoinduced toxicity of selected metal oxide nanoparticles(ZnO,CuO,Co_3O_4 and TiO_2)to E.coli bacteria 被引量:9
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作者 Thabitha P.Dasari Kavitha Pathakoti Huey-Min Hwang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2013年第5期882-888,共7页
Cytotoxicity of selected metal oxide nanoparticles(MNPs)(ZnO,CuO,Co 3 O 4 and TiO 2)was investigated in Escherichia coli both under light and dark conditions.Cytotoxicity experiments were conducted with spread pla... Cytotoxicity of selected metal oxide nanoparticles(MNPs)(ZnO,CuO,Co 3 O 4 and TiO 2)was investigated in Escherichia coli both under light and dark conditions.Cytotoxicity experiments were conducted with spread plate counting and the LC 50 values were calculated.We determined the mechanism of toxicity via measurements of oxidative stress,reduced glutathione,lipid peroxidation,and metal ions.The overall ranking of the LC 50 values was in the order of ZnO 〈 CuO 〈 Co 3 O 4 〈 TiO 2 under dark condition and ZnO 〈 CuO 〈 TiO 2 〈 Co 3 O 4 under light condition.ZnO MNPs were the most toxic among the tested nanoparticles.Our results indicate depletion of reduced glutathione level and elevation of malondialdehyde level correlated with the increase in oxidative stress.Released metal ions were found to have partial effect on the toxicity of MNPs to E.coli.In summary,the dynamic interactions of multiple mechanisms lead to the toxicity of the tested MNPs to E.coli. 展开更多
关键词 metal oxide nanoparticles reactive oxygen species median lethal concentration reduced glutathione lipid peroxidation
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Preparation of Rare Earth Hydroxide and Oxide Nanoparticles by Precipitation Method 被引量:8
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作者 Xiangting DONG Guangyan HONG 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2005年第4期555-558,共4页
A series of rare earth hydroxide and oxide nanoparticles have been prepared by precipitation method with alcohol as the dispersive and protective reagent. Transmission electron microscope (TEM) images indicate that ... A series of rare earth hydroxide and oxide nanoparticles have been prepared by precipitation method with alcohol as the dispersive and protective reagent. Transmission electron microscope (TEM) images indicate that the particles are spherical in shape and smaller than 100 nm in size. The crystallite sizes of cubic Ln2O3 have lanthanide shrinking effect, while average crystal lattice distortion rates possess lanthanide swelling effect. The diffraction peak intensity of heavy rare earth oxide nanometer powders is remarkably stronger than that of light rare earth oxide nanometer powders. The variation of diffraction intensity with atomic number presents an inverted W type, forming a double peak structure. Fourier transform infrared (FTIR) spectrums reveal that Ln2O3 nanopowders have higher surface activity than that of ordinary Ln2O3 powders. The UV-vis spectra show that Ln-O bond of these particles is slightly blue-shifted, and its absorption intensity decreases. 展开更多
关键词 Rare earth Rare earth hydroxide Rare earth oxide nanoparticlE Precipitation method
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The catalytic activity of transition metal oxide nanoparticles on thermal decomposition of ammonium perchlorate 被引量:6
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作者 Jalpa A. Vara Pragnesh N. Dave Shalini Chaturvedi 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2019年第4期629-635,共7页
The catalytic proficiency of three MONs for AP thermal decomposition was studied in this work.A chemical co-precipitation method was used for synthesis of MONs(CuZnO,CoZnO,and NiZnO)and their characterization carried ... The catalytic proficiency of three MONs for AP thermal decomposition was studied in this work.A chemical co-precipitation method was used for synthesis of MONs(CuZnO,CoZnO,and NiZnO)and their characterization carried out by utilizing XRD,FTIR,and SEM.The TGA/DSC technique was employed for the investigation of the catalytic proficiency of MONs on the AP.The DSC data were used for measuring activation energy of catalyzed AP by using Ozawa,Kissinger,and Starink method.The MONs were much sensitive for AP decomposition,and the performance of AP decomposition was further improved.Among all the MONs,the CuZnO exhibits higher catalytic action than others and decomposition temperature of AP is descending around 117℃ by CuZnO.The reduction in the activation energy was noticed after the incorporation of MONs in AP. 展开更多
关键词 Metal oxide nanoparticles(MONs) AMMONIUM perchlorate(AP) CATALYTIC activity Activation energy
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Shellac-coated iron oxide nanoparticles for removal of cadmium(Ⅱ) ions from aqueous solution 被引量:6
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作者 Jilai Gong Long Chen +4 位作者 Guangming Zeng Fei Long Jiuhua Deng Qiuya Niu Xun He 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2012年第7期1165-1173,共9页
This study describes a new effective adsorbent for cadmium removal from aqueous solution synthesized by coating a shellac layer, a natural biodegradable and renewable resin with abundant hydroxyl and carboxylic groups... This study describes a new effective adsorbent for cadmium removal from aqueous solution synthesized by coating a shellac layer, a natural biodegradable and renewable resin with abundant hydroxyl and carboxylic groups, on the surface of iron oxide magnetic nanoparticles. Transmission Electron Microscopy (TEM) imaging showed shellac-coated magnetic nanoparticle (SCMN) adsorbents had a core-shell structure with a core of 20 nm and shell of 5 nm. Fourier Transform Infrared Spectroscopic analysis suggested the occurrence of reaction between carboxyl groups on the SCMN adsorbent surface and cadmium ions in aqueous solution. Kinetic data were well described by pseudo second-order model and adsorption isotherms were fitted with both Langmuir and Freundlich models with maximum adsorption capacity of 18.80 mg]g. SCMN adsorbents provided a favorable adsorption capacity under high salinity conditions, and cadmium could easily be desorbed using mild organic acid solutions at low concentration. 展开更多
关键词 cadmium ions SHELLAC iron oxide nanoparticles natural material magnetic separation
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Synthesis of Dy_2O_3 nanoparticles via hydroxide precipitation: effect of calcination temperature 被引量:6
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作者 Bahaa M.Abu-Zied Abdullah M.Asiri 《Journal of Rare Earths》 SCIE EI CAS CSCD 2014年第3期259-264,共6页
This work described the preparation of dysprosium oxide, Dy203, nanoparticles using the homogeneous precipitation method. Dy3+ ions were precipitated using NaOH solution. The obtained product was filtered, dried, and... This work described the preparation of dysprosium oxide, Dy203, nanoparticles using the homogeneous precipitation method. Dy3+ ions were precipitated using NaOH solution. The obtained product was filtered, dried, and then calcined for 1 h at the temperature range of 300-700 ℃ in static air. The calcination temperature of the Dy-precttrsor was chosen based on its decomposi- tion as indicated by the TGA analysis. The crystalline structure and surface morphology of the calcined solids were studied by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM) and X-ray pho- toelectron spectroscopy (XPS). The obtained results revealed that Dy203 with crystallites size of 11-21 nm was formed at 500 ℃. Such value increased to 25-37 nm for the sample calcined at 700 ℃. 展开更多
关键词 nanocrystalline dysprosium oxide Dy203 precipitation method Dy203 nanoparticles rare earths
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Improving the performance of solid oxide electrolysis cell with gold nanoparticles-modified LSM-YSZ anode 被引量:6
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作者 Yuefeng Song Xiaomin Zhang +5 位作者 Yingjie Zhou Houfu Lv Qingxue Liu Weicheng Feng Guoxiong Wang Xinhe Bao 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2019年第8期181-187,I0007,共8页
Gold, as the common current collector in solid oxide electrolysis cell(SOEC), is traditionally considered to be inert for oxygen evolution reaction at the anode of SOEC. Herein, gold nanoparticles were loaded onto con... Gold, as the common current collector in solid oxide electrolysis cell(SOEC), is traditionally considered to be inert for oxygen evolution reaction at the anode of SOEC. Herein, gold nanoparticles were loaded onto conventional strontium doped lanthanum manganite-yttria stabilized zirconia(LSM-YSZ) anode, which evidently improved the performance of oxygen evolution reaction at 800 °C. The current densities at 1.2 V and 1.4 V increased by 60.0% and 46.9%, respectively, after loading gold nanoparticles onto the LSM-YSZ anode. Physicochemical characterizations and electrochemical measurements suggested that the improved SOEC performance was attributed to the accelerated electron transfer of elementary process in anodic polarization reaction and the newly generated triple phase boundaries in gold nanoparticles-loaded LSMYSZ anode. 展开更多
关键词 Solid oxide ELECTROLYSIS cell Oxygen evolution reaction Gold nanoparticles CO2 ELECTROLYSIS STRONTIUM doped LANTHANUM manganite-yttria stabilized zirconia
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