In this work,Bi-based catalysts were prepared by one pot method(PM)and incipient wetness impregnation method(IM)and preparation conditions of the PM were researched.Catalytic activity of catalysts was evaluated using ...In this work,Bi-based catalysts were prepared by one pot method(PM)and incipient wetness impregnation method(IM)and preparation conditions of the PM were researched.Catalytic activity of catalysts was evaluated using a fixed-bed reactor for acetylene hydrochlorination.The results displayed that the PM catalyst was prepared at 160℃for 2 h possessed a superior catalytic performance compared to the IM catalyst.The characterizations of XRD,BET,EDS and SEM demonstrated that the PM catalyst was microspheres structure,which could provide richer channel structures,larger specific surface areas and more active centres,thus improving the catalytic performances of catalysts.In addition,carbon deposition in the reaction was a possible reason for Bi-based catalysts deactivation.展开更多
The title compound was synthesized by a one pot synthesis method with ethanolamine ,ketone and dichloroacetyl chloride. The product was characterization by IR, 1 HNMR,UV, and elementary analysis.
The photocatalytic reduction of CO_(2) into value-added chemicals is of great significance for the utilization of carbon resources,but it also faces the problem of low solar energy efficiency and inefficient charge se...The photocatalytic reduction of CO_(2) into value-added chemicals is of great significance for the utilization of carbon resources,but it also faces the problem of low solar energy efficiency and inefficient charge separation.Herein,a CuSCN-loaded CoS_(2) photocatalyst was prepared via a one-pot molten-salt method,and the optimal CO generation rate could reach 289.8μmol g^(−1) h^(−1)(selectivity 92.0%),approximately 32 times that of bare CoS_(2) under a visible-light excitation of λ≥420 nm.In situ X-ray photoelectron spectroscopy(XPS)results indicate that CuSCN acts as a hole acceptor,and photoelectrochemical tests and density functional theory(DFT)calculations demonstrate that CuSCN/CoS_(2) has higher efficiency in the separation and transfer of photogenerated carriers than CoS_(2).CuSCN was proved to be a strong carrier for CO_(2) mass transfer through Brunauer–Emmett–Teller(BET)physical adsorption.Mechanistic studies show that CuSCN/CoS_(2) is more conducive to the conversion of adsorbed CO_(2) into the key reactive intermediate ^(*)COOH,for which the Co sites of CuSCN/CoS_(2) exhibit a lower formation energy,in comparison with CoS_(2) and CuSCN alone.As such,the combined action of CuSCN/CoS_(2) was a synergistic effect that enhances CO_(2) chemisorption and hole transfer,resulting in increased photocatalytic activity for CO_(2) reduction.展开更多
Hydrogen storage-a key hurdle for clean energy-has advanced with a pilot plant producing 150 tons of magnesium hydride annually since January 10,2025.Developed by a research team at the Dalian Institute of Chemical Ph...Hydrogen storage-a key hurdle for clean energy-has advanced with a pilot plant producing 150 tons of magnesium hydride annually since January 10,2025.Developed by a research team at the Dalian Institute of Chemical Physics(DICP)of the Chinese Academy of Sciences,the project uses a novel“one-pot”method to synthesize magnesium-based materials that store hydrogen safely and efficiently.展开更多
The 3,4,5 trimethoxytoluene(TMT) was systhesized using p cresol by three steps including bromination, methoxylation, and methylation with an overall yield of 84%. The structure of TMT was identified by NMR, GC/MS and ...The 3,4,5 trimethoxytoluene(TMT) was systhesized using p cresol by three steps including bromination, methoxylation, and methylation with an overall yield of 84%. The structure of TMT was identified by NMR, GC/MS and IR.“One pot”method was used in methoxylation and methylation for economical and convenient consideration. The mechanism for the methoxylation of 2,6 dibromo 4 methylphenol was discussed.展开更多
A one-pot method for the synthesis of uniform Eu^(3+)-doped NaBi(MoO_(4))_(2)nanoparticles with an ellipsoidal shape and tetragonal crystal structure functionalized with polyacrylic acid is reported for the first time...A one-pot method for the synthesis of uniform Eu^(3+)-doped NaBi(MoO_(4))_(2)nanoparticles with an ellipsoidal shape and tetragonal crystal structure functionalized with polyacrylic acid is reported for the first time in the literature.The method is based on a homogeneous precipitation reaction from solutions in an ethylene glycol/water medium containing appropriate bismuth,sodium,and molybdate precursors and polyacrylic acid.The luminescence properties(excitation and emission spectra and luminescence lifetime)of such nanoparticles are evaluated for different Eu^(3+)doping levels,finding an intense red emission for all synthesized samples.The X-ray attenuation properties of the nanoparticles have been also analyzed,which were found to be better than those of a commercially computed tomography contrast agent(iohexol).The dispersibility of the nanoparticles in a physiological medium was also analyzed,finding that they could be well dispersed in a 2-N-morpholinoethanesulfonic acid monohydrate medium(pH=6.5).Finally,the cell viability of such a phosphor has been analyzed using MIA-PaCa-2 cells and its in vivo toxicity has been evaluated using the nematode Caenorhabditis elegans model finding no significant toxicity in both cases up to a nanoparticle concentration of 100μg mL-1,which is within the range required for most in vivo applications.The developed Eu^(3+)-doped NaBi(MoO_(4))_(2)nanoparticles are,therefore,excellent candidates for their use as bimodal probes for luminescence imaging and X-ray computed tomography.展开更多
Constructing fullerene-like metal-organic cage integrating novel architectures and unique functions remains a formidable challenge.Herein,an unprecedented high-nuclearity fullerene-like heteropolyoxometalate cage,{Na_...Constructing fullerene-like metal-organic cage integrating novel architectures and unique functions remains a formidable challenge.Herein,an unprecedented high-nuclearity fullerene-like heteropolyoxometalate cage,{Na_(32)[(VVO_(2))_(30)(MoVIO_(4))_(12)(PhPO_(3))_(48)(CH_(3)COO)_(12)](CO_(3))_(2)}·5MeCN(Mo_(24)V_(30)P_(48),MeCN=acetonitrile),was successfully synthesized via a one-pot method.This anionic cluster can be described as a pseudo-cubic cage assembled from 12{Mo_(2)V_(2)P_(4)}quadrilaterals and 6{VO_(6)}octahedra.Sodium ions are employed as templates to fill the cage.The entire structure displays a distinct four-shell{Mo_(24)}@{V_(30)P_(48)}@{Na_(24)}@{Na_(8)}arrangement.Since all the{Mo_(2)}units and Na^(+)ions are located on the{V_(30)P_(48)}cage,this structure can also be simplified as a fullerene-like heterometallic cage composed of 12{Mo_(2)V_(2)P_(4)}hexagons,8{NaV_(3)P_(3)}hexagons,and 24{NaV_(2)P_(3)}pentagons.Additionally,Mo_(24)V_(30)P_(48) exhibits high solution stability,as confirmed by ESI-MS,PXRD and SEM,which makes it a highly efficient and stable catalyst for phenolic oxidation reactions.展开更多
Ceramic composite oxygen transport membranes 60 wt%Ce0.9Pr0.1O_(2-δ)-40 wt%Pr0.6Ca0.4Fe1-xCoxO_(3)-δ(0≤x≤1)were synthesized via the Pechini one-pot method.X-ray diffraction patterns indicated that membranes of all...Ceramic composite oxygen transport membranes 60 wt%Ce0.9Pr0.1O_(2-δ)-40 wt%Pr0.6Ca0.4Fe1-xCoxO_(3)-δ(0≤x≤1)were synthesized via the Pechini one-pot method.X-ray diffraction patterns indicated that membranes of all compositions maintained the same crystal structure at the room temperature,whereas with the decrease in the Fe/Co ratio,it was more easier to find phase decomposition under Ar environment at an elevated temperature.SEM images demonstrate that the mechanical compatibility of the two phases becomes worse and the grain size gradually increases with the increase in the Co content.Oxygen permeability test results showed that the reduction in the Fe/Co ratio improved the oxygen permeability of the membrane for x≤0.6,while the reduction in the Fe/Co ratio had an adverse impact on the oxygen permeability for x≥0.8.Among all the composition membranes,60 wt%Ce0.9Pr0.1O_(2-δ)-40 wt%Pr0.6Ca0.4Fe0.4Co0.6O_(3)-δmembrane possessed the highest permeation flux of about 0.85 mL min^(-1) cm^(-2) at 1000℃ under air/He atmosphere.The final stability testing indicated that it possessed good stability under air/He,and thereby has potential application prospects in high temperature oxygen consumption industries.展开更多
Europium-doped bismuth vanadate EBVO-x(0≤x≤7)with different crystalline phases has been successfully synthesized via a simple one-pot hydrothermal method.X-ray diffractometry,Raman scattering and scanning electron m...Europium-doped bismuth vanadate EBVO-x(0≤x≤7)with different crystalline phases has been successfully synthesized via a simple one-pot hydrothermal method.X-ray diffractometry,Raman scattering and scanning electron microscopy revealed that the crystal phase transformed from the monoclinic phase to the tetragonal phase,probably owing to the substitution of europium ions in the Bi3+positions.Significant changes in the physical-chemical characteristics of the material with the initial molar ratio of Eu to Bi were observed.Adding the europium causes alteration of the BiVO4 structure from a monoclinic scheelite(x<3)to a tetragonal zircon(x≥3)structure with a mixed-phase state between them.The photocatalytic activities of the prepared samples were evaluated by degrading methylene blue(MB)under visible light irradiation and the best performance was attained for the EBVO-5 material with a phase transition trend.The results of the photoluminescence spectroscopy demonstrated that the recombination of photogenerated charges was greatly depressed and the photocatalytic activity was improved by the substitution of Eu for Bi in BiVO4.Furthermore,the proposed mechanism of the enhanced photocatalytic activity was discussed.展开更多
A novel hybrid of Cu_(2)MoS_(4) nanoparticles embedded on reduced graphene oxide(rGO)sheets was prepared via a one-pot hydrothermal method without any surfactants or templates.The electrochemical properties of the as-...A novel hybrid of Cu_(2)MoS_(4) nanoparticles embedded on reduced graphene oxide(rGO)sheets was prepared via a one-pot hydrothermal method without any surfactants or templates.The electrochemical properties of the as-prepared Cu_(2)MoS_(4)-rGO electrode were investigated as an advanced electrode for supercapacitor applications,and it exhibited higher specific capacitance(231.51 F g^(-1) at 5 mV s^(-1))compared to the pristine Cu_(2)MoS_(4) electrode(135.78 F g^(-1) at 5 mV s^(-1)).展开更多
The design and synthesis of efficient catalysts to substitute the currently effective and sturdy electrocatalysts composed of precious metal-based materials(e.g.,IrO_(2)and RuO_(2))for the oxygen evolution reaction(OE...The design and synthesis of efficient catalysts to substitute the currently effective and sturdy electrocatalysts composed of precious metal-based materials(e.g.,IrO_(2)and RuO_(2))for the oxygen evolution reaction(OER)is still a huge challenge.In this regard,nickel-based OER catalysts with specific properties have drawn widespread attention.Herein,we prepared core-shell structured hierarchically mesoporous NiO microspheres through the thermal decomposition of Ni(OH)_(2)microspheres,which were synthesized through a one-pot hydrothermal method.The obtained NiO microspheres possess numerous mesopores,a high BET surface area,and 2D nanosheet-like shells,which largely promote mass/charge transportation and reduce ion transport pathways.By increasing the molar ratio of HMTA/Ni^(2+),the thickness of the outer nanosheet-like shell can be varied in the range of 0-35 nm.In particular,the NiO-300/r=2 microspheres possess excellent properties for OER(overpotential of 360 mV to reach 10 mV cm^(-2)),compared with previously-reported Ni-based materials.Furthermore,improved activity with an overpotential of 340 mV was reached by introducing Co.展开更多
基金Natural Scientific Foundation of China(21263025,U1403293)
文摘In this work,Bi-based catalysts were prepared by one pot method(PM)and incipient wetness impregnation method(IM)and preparation conditions of the PM were researched.Catalytic activity of catalysts was evaluated using a fixed-bed reactor for acetylene hydrochlorination.The results displayed that the PM catalyst was prepared at 160℃for 2 h possessed a superior catalytic performance compared to the IM catalyst.The characterizations of XRD,BET,EDS and SEM demonstrated that the PM catalyst was microspheres structure,which could provide richer channel structures,larger specific surface areas and more active centres,thus improving the catalytic performances of catalysts.In addition,carbon deposition in the reaction was a possible reason for Bi-based catalysts deactivation.
文摘The title compound was synthesized by a one pot synthesis method with ethanolamine ,ketone and dichloroacetyl chloride. The product was characterization by IR, 1 HNMR,UV, and elementary analysis.
基金supported by the National Natural Science Foundation of China(22366018,5236005,22272034)Key Projects of Jiangxi Provincial Natural Science Foundation(20232ACB203022,20224ACB213010)+3 种基金Jiangxi Province“Double Thousand”Talent Training Plan(jxsq2023201086,jxsq2023102141,jxsq2023102142,jxsq2023102143)Program of Qingjiang Excellent Young Talents,JXUST(JXUSTQJBJ2020005)Jiangxi Provincial Natural Science Foundation(20224BAB203018)Jiangxi Province Graduate Innovation Special Fund Project(YC2022-S659).
文摘The photocatalytic reduction of CO_(2) into value-added chemicals is of great significance for the utilization of carbon resources,but it also faces the problem of low solar energy efficiency and inefficient charge separation.Herein,a CuSCN-loaded CoS_(2) photocatalyst was prepared via a one-pot molten-salt method,and the optimal CO generation rate could reach 289.8μmol g^(−1) h^(−1)(selectivity 92.0%),approximately 32 times that of bare CoS_(2) under a visible-light excitation of λ≥420 nm.In situ X-ray photoelectron spectroscopy(XPS)results indicate that CuSCN acts as a hole acceptor,and photoelectrochemical tests and density functional theory(DFT)calculations demonstrate that CuSCN/CoS_(2) has higher efficiency in the separation and transfer of photogenerated carriers than CoS_(2).CuSCN was proved to be a strong carrier for CO_(2) mass transfer through Brunauer–Emmett–Teller(BET)physical adsorption.Mechanistic studies show that CuSCN/CoS_(2) is more conducive to the conversion of adsorbed CO_(2) into the key reactive intermediate ^(*)COOH,for which the Co sites of CuSCN/CoS_(2) exhibit a lower formation energy,in comparison with CoS_(2) and CuSCN alone.As such,the combined action of CuSCN/CoS_(2) was a synergistic effect that enhances CO_(2) chemisorption and hole transfer,resulting in increased photocatalytic activity for CO_(2) reduction.
文摘Hydrogen storage-a key hurdle for clean energy-has advanced with a pilot plant producing 150 tons of magnesium hydride annually since January 10,2025.Developed by a research team at the Dalian Institute of Chemical Physics(DICP)of the Chinese Academy of Sciences,the project uses a novel“one-pot”method to synthesize magnesium-based materials that store hydrogen safely and efficiently.
文摘The 3,4,5 trimethoxytoluene(TMT) was systhesized using p cresol by three steps including bromination, methoxylation, and methylation with an overall yield of 84%. The structure of TMT was identified by NMR, GC/MS and IR.“One pot”method was used in methoxylation and methylation for economical and convenient consideration. The mechanism for the methoxylation of 2,6 dibromo 4 methylphenol was discussed.
基金the I+D+I Grant RTI2018-094426-B-I00 and funded by MCIN/AEI/10.13039/501100011033 and by“ERDF A way of making Europe”R.M.Calderón-Olvera acknowledges the financial support from the CONACYT-801024 postdoctoral grant+5 种基金support from the FPI program(PRE2019-090170)the grant FPU19/00527 funded by MCIN/AEI/10.13039/501100011033 and by“ESF Investing in your future”the FPU predoctoral contract(FPU19/01311)from Ministerio de Educación Cultura y Deporte(Spain)DGA and Fondos Feder(Bionanosurf E15_17R)and CIBER-Consorcio Centro de Investigación Biomédica en Red(CB16/01/00263)Instituto de Salud Carlos III(Spanish Ministry of Science and Innovation and European Commission,European Regional Development Fund)the European Commission NextGenerationEU(Regulation EU 2020/2094).
文摘A one-pot method for the synthesis of uniform Eu^(3+)-doped NaBi(MoO_(4))_(2)nanoparticles with an ellipsoidal shape and tetragonal crystal structure functionalized with polyacrylic acid is reported for the first time in the literature.The method is based on a homogeneous precipitation reaction from solutions in an ethylene glycol/water medium containing appropriate bismuth,sodium,and molybdate precursors and polyacrylic acid.The luminescence properties(excitation and emission spectra and luminescence lifetime)of such nanoparticles are evaluated for different Eu^(3+)doping levels,finding an intense red emission for all synthesized samples.The X-ray attenuation properties of the nanoparticles have been also analyzed,which were found to be better than those of a commercially computed tomography contrast agent(iohexol).The dispersibility of the nanoparticles in a physiological medium was also analyzed,finding that they could be well dispersed in a 2-N-morpholinoethanesulfonic acid monohydrate medium(pH=6.5).Finally,the cell viability of such a phosphor has been analyzed using MIA-PaCa-2 cells and its in vivo toxicity has been evaluated using the nematode Caenorhabditis elegans model finding no significant toxicity in both cases up to a nanoparticle concentration of 100μg mL-1,which is within the range required for most in vivo applications.The developed Eu^(3+)-doped NaBi(MoO_(4))_(2)nanoparticles are,therefore,excellent candidates for their use as bimodal probes for luminescence imaging and X-ray computed tomography.
基金financially supported by the NSFC of China(no.22371032 and 22271023).
文摘Constructing fullerene-like metal-organic cage integrating novel architectures and unique functions remains a formidable challenge.Herein,an unprecedented high-nuclearity fullerene-like heteropolyoxometalate cage,{Na_(32)[(VVO_(2))_(30)(MoVIO_(4))_(12)(PhPO_(3))_(48)(CH_(3)COO)_(12)](CO_(3))_(2)}·5MeCN(Mo_(24)V_(30)P_(48),MeCN=acetonitrile),was successfully synthesized via a one-pot method.This anionic cluster can be described as a pseudo-cubic cage assembled from 12{Mo_(2)V_(2)P_(4)}quadrilaterals and 6{VO_(6)}octahedra.Sodium ions are employed as templates to fill the cage.The entire structure displays a distinct four-shell{Mo_(24)}@{V_(30)P_(48)}@{Na_(24)}@{Na_(8)}arrangement.Since all the{Mo_(2)}units and Na^(+)ions are located on the{V_(30)P_(48)}cage,this structure can also be simplified as a fullerene-like heterometallic cage composed of 12{Mo_(2)V_(2)P_(4)}hexagons,8{NaV_(3)P_(3)}hexagons,and 24{NaV_(2)P_(3)}pentagons.Additionally,Mo_(24)V_(30)P_(48) exhibits high solution stability,as confirmed by ESI-MS,PXRD and SEM,which makes it a highly efficient and stable catalyst for phenolic oxidation reactions.
基金support by“Hundred Talents Program”of Sun Yat-Sen University and National Natural Science Foundation of China(21701197,11922415).
文摘Ceramic composite oxygen transport membranes 60 wt%Ce0.9Pr0.1O_(2-δ)-40 wt%Pr0.6Ca0.4Fe1-xCoxO_(3)-δ(0≤x≤1)were synthesized via the Pechini one-pot method.X-ray diffraction patterns indicated that membranes of all compositions maintained the same crystal structure at the room temperature,whereas with the decrease in the Fe/Co ratio,it was more easier to find phase decomposition under Ar environment at an elevated temperature.SEM images demonstrate that the mechanical compatibility of the two phases becomes worse and the grain size gradually increases with the increase in the Co content.Oxygen permeability test results showed that the reduction in the Fe/Co ratio improved the oxygen permeability of the membrane for x≤0.6,while the reduction in the Fe/Co ratio had an adverse impact on the oxygen permeability for x≥0.8.Among all the composition membranes,60 wt%Ce0.9Pr0.1O_(2-δ)-40 wt%Pr0.6Ca0.4Fe0.4Co0.6O_(3)-δmembrane possessed the highest permeation flux of about 0.85 mL min^(-1) cm^(-2) at 1000℃ under air/He atmosphere.The final stability testing indicated that it possessed good stability under air/He,and thereby has potential application prospects in high temperature oxygen consumption industries.
基金financially supported by National Natural Science Foundation of China(51974168)Science and Technology Major Project Inner Mongolia Autonomous Region in China(2019ZD023 and 2021ZD0028)State Key Laboratory of Silicate Materials for Architectures(Wuhan University of Technology)(SYSJJ2020-08).
文摘Europium-doped bismuth vanadate EBVO-x(0≤x≤7)with different crystalline phases has been successfully synthesized via a simple one-pot hydrothermal method.X-ray diffractometry,Raman scattering and scanning electron microscopy revealed that the crystal phase transformed from the monoclinic phase to the tetragonal phase,probably owing to the substitution of europium ions in the Bi3+positions.Significant changes in the physical-chemical characteristics of the material with the initial molar ratio of Eu to Bi were observed.Adding the europium causes alteration of the BiVO4 structure from a monoclinic scheelite(x<3)to a tetragonal zircon(x≥3)structure with a mixed-phase state between them.The photocatalytic activities of the prepared samples were evaluated by degrading methylene blue(MB)under visible light irradiation and the best performance was attained for the EBVO-5 material with a phase transition trend.The results of the photoluminescence spectroscopy demonstrated that the recombination of photogenerated charges was greatly depressed and the photocatalytic activity was improved by the substitution of Eu for Bi in BiVO4.Furthermore,the proposed mechanism of the enhanced photocatalytic activity was discussed.
基金supported by the Basic Science Research Program through the National Research Foundation of Korea(NRF)grant funded by the Korean government(MSIT)(2018R1A4A1025998,2019R1A2C3009747).
文摘A novel hybrid of Cu_(2)MoS_(4) nanoparticles embedded on reduced graphene oxide(rGO)sheets was prepared via a one-pot hydrothermal method without any surfactants or templates.The electrochemical properties of the as-prepared Cu_(2)MoS_(4)-rGO electrode were investigated as an advanced electrode for supercapacitor applications,and it exhibited higher specific capacitance(231.51 F g^(-1) at 5 mV s^(-1))compared to the pristine Cu_(2)MoS_(4) electrode(135.78 F g^(-1) at 5 mV s^(-1)).
基金supported by the Young Thousand Talented Programthe National Natural Science Foundation of China(21671073,21621001,21604030 and 21671074)+1 种基金the“111”Project of the Ministry of Education of China(B17020)Program for JLU Science and Technology Innovative Research Team.
文摘The design and synthesis of efficient catalysts to substitute the currently effective and sturdy electrocatalysts composed of precious metal-based materials(e.g.,IrO_(2)and RuO_(2))for the oxygen evolution reaction(OER)is still a huge challenge.In this regard,nickel-based OER catalysts with specific properties have drawn widespread attention.Herein,we prepared core-shell structured hierarchically mesoporous NiO microspheres through the thermal decomposition of Ni(OH)_(2)microspheres,which were synthesized through a one-pot hydrothermal method.The obtained NiO microspheres possess numerous mesopores,a high BET surface area,and 2D nanosheet-like shells,which largely promote mass/charge transportation and reduce ion transport pathways.By increasing the molar ratio of HMTA/Ni^(2+),the thickness of the outer nanosheet-like shell can be varied in the range of 0-35 nm.In particular,the NiO-300/r=2 microspheres possess excellent properties for OER(overpotential of 360 mV to reach 10 mV cm^(-2)),compared with previously-reported Ni-based materials.Furthermore,improved activity with an overpotential of 340 mV was reached by introducing Co.
