Based on the microstructure characterization,electrochemical impedance spectroscopy,potentiodynamic polarization,and immersion corrosion,this work comparatively analyzed the differences in the electrochemical corrosio...Based on the microstructure characterization,electrochemical impedance spectroscopy,potentiodynamic polarization,and immersion corrosion,this work comparatively analyzed the differences in the electrochemical corrosion morphology and post-foil formation surface morphology of laser beam welded(LBW)sample and spin-formed sample,and compared the corrosion resistance and Cu foil formation ability of two samples in H_(2)SO_(4)/NaCl solution and CuSO_(4) reducing electrolyte.Results show that in H_(2)SO_(4) and NaCl solutions,LBW sample and spin-formed sample exhibit excellent passivation ability and corrosion resistance.Both samples show uniform corrosion morphologies and similar corrosion resistance in the strong acidic solution containing Cl^(-).Meanwhile,the Cu foil formation ability of the welded joint is similar to that of the spin-formed sample,and both samples obtain intact Cu foils with high-quality surfaces and small differences in properties.展开更多
The efficient and environmentally friendly recycling technology of waste residue that including abundant heavy metal produced during the recovery of lithium batteries has become a research hotspot.Herein,a novelty pro...The efficient and environmentally friendly recycling technology of waste residue that including abundant heavy metal produced during the recovery of lithium batteries has become a research hotspot.Herein,a novelty process of acid leaching-selective electrodeposition-deep impurity removal-regeneration was proposed to recovery of the CuS slag,which has been efficient transferred to high purity cathode copper and commercially available ternary precursors.Copper cathode with a purity of 99.67%was prepared under electrochemical reaction conditions at-0.55 V for 2 h.A novel impurity remover-Mn powder,which was used to remove the residual impurities and as a feedstock for the ternary precursor.Finally,NCM523 was regenerated by co-precipitation.The process is superior to the traditional process in economy,energy consumption,CO_(2)emissions,product purity and process duration.This study provides a new approach for solid waste recovery and precious metal enrichment.展开更多
采用水热合成法制备了CuS_(x)催化剂,通过改变前驱体铜硫比〔n(Cu)∶n(S)〕,调控催化剂形貌和反应路径。将CuS_(x)催化剂用于温和电势下CO_(2)高效电催化还原制CO反应。采用XRD、FESEM和XPS对CuS_(x)催化剂进行了表征,探究了铜硫比对CuS...采用水热合成法制备了CuS_(x)催化剂,通过改变前驱体铜硫比〔n(Cu)∶n(S)〕,调控催化剂形貌和反应路径。将CuS_(x)催化剂用于温和电势下CO_(2)高效电催化还原制CO反应。采用XRD、FESEM和XPS对CuS_(x)催化剂进行了表征,探究了铜硫比对CuS_(x)催化剂电催化CO_(2)还原“构效关系”的影响。结果表明,铜硫比影响CuS晶体成核与生长,进而影响CuS_(x)催化剂的形貌和S空位缺陷。当铜硫比在2∶1~1∶4内变化,CuS_(x)催化剂的形貌由荷花状转化为花球状,S空位含量由20.66%提高至63.37%,CO_(2)电催化还原活性和目标产物CO选择性明显提升。由铜硫比为1∶4制备的CuS_(x)催化剂(CuS-1∶4)在0.1 mol/L的KHCO3电解液中,在–0.51 V vs.RHE(可逆氢电极)的温和电势下,CO选择性达72.67%。CuS-1∶4优异的CO_(2)还原性能归因于催化剂花球状形貌、高比表面积和气体扩散通道提供的不饱和活性位点促进了气体扩散,以及S空位缺陷对电子传递和*COOH中间体在催化剂表面吸附的强化作用。展开更多
In this study,the hydrothermal method was employed to grow submicron CuS on carbon cloth(CC),and the photoreduction method was used to grow Ag nanoparticles on the CuS submicron flowers,thus forming the Ag/CuS/CC cata...In this study,the hydrothermal method was employed to grow submicron CuS on carbon cloth(CC),and the photoreduction method was used to grow Ag nanoparticles on the CuS submicron flowers,thus forming the Ag/CuS/CC catalytic electrode.The application of Ag/CuS/CC electrode-coupled dielectric barrier discharge(DBD)plasma in the disinfection of pathogenic bacteria in water was studied.The Ag/CuS/CC electrode exhibits strong antibacterial activity,and under an external voltage of 30 V,the degradation efficiency of Bacillus subtilis reaches 99.99%within 15 min without regeneration.After five cycles,the inactivation rate of Bacillus subtilis reached 99.99%within 25 min.The practical applicability of the Ag/CuS/CC-coupled DBD system for treating actual wastewater was evaluated,and the changes in biological toxicity were investigated.The results indicate that the prepared Ag/CuS/CC coupled DBD has great potential for safe disinfection of pathogenic bacteria in water through integrated processes.展开更多
Cervical cancer stands is a formidablemalignancy that poses a significant threat towomen’s health.Calcium overload,a minimally invasive tumor treatment,aims to accumulate an excessive concentration of Ca^(2+)within m...Cervical cancer stands is a formidablemalignancy that poses a significant threat towomen’s health.Calcium overload,a minimally invasive tumor treatment,aims to accumulate an excessive concentration of Ca^(2+)within mitochondria,triggering apoptosis.Copper sulfide(CuS)represents a photothermal mediator for tumor hyperthermia.However,relying solely on thermotherapy often proves insufficient in controlling tumor growth.Curcumin(CUR),an herbal compound with anti-cancer properties,inhibits the efflux of exogenous Ca^(2+)while promoting its excretion from the endoplasmic reticulum into the cytoplasm.To harness these therapeutic modalities,we have developed a nanoplatform that incorporates hollow CuS nanoparticles(NPs)adorned with multiple CaCO_(3) particles and internally loaded with CUR.This nanocomposite exhibits high uptake and easy escape from lysosomes,along with the degradation of surrounding CaCO3,provoking the generation of abundant exogenous Ca^(2+)in situ,ultimately damaging the mitochondria of diseased cells.Impressively,under laser excitation,the CuS NPs demonstrate a photothermal effect that accelerates the degradation of CaCO_(3),synergistically enhancing the antitumor effect through photothermal therapy.Additionally,fluorescence imaging reveals the distribution of these nanovehicles in vivo,indicating their effective accumulation at the tumor site.This nanoplatform shows promising outcomes for tumor-targeting and the effective treatment in a murine model of cervical cancer,achieved through cascade enhancement of calcium overload-based dual therapy.展开更多
MoS_(2)/CuS composite catalysts were successfully synthesized using a one-step hydrothermal method with sodium molybdate dihydrate,thiourea,oxalic acid,and copper nitrate trihydrate as raw materials.The hydrogen pro-d...MoS_(2)/CuS composite catalysts were successfully synthesized using a one-step hydrothermal method with sodium molybdate dihydrate,thiourea,oxalic acid,and copper nitrate trihydrate as raw materials.The hydrogen pro-duction performance of MoS_(2)/CuS prepared with different molar ratios of Mo to Cu precursors(n_(Mo)∶n_(Cu))as cathodic catalysts was investigated in the two-chamber microbial electrolytic cell(MEC).X-ray diffraction(XRD),X-ray pho-toelectron spectroscopy(XPS),scanning electron microscopy(SEM),transmission electron microscope(TEM),linear scanning voltammetry(LSV),electrochemical impedance analysis(EIS),and cyclic voltammetry(CV)were used to characterize the synthesized catalysts for testing and analyzing the hydrogen-producing performance.The results showed that the hydrogen evolution performance of MoS_(2)/CuS-20%(nMo∶nCu=5∶1)was better than that of platinum(Pt)mesh,and the hydrogen production rate of MoS_(2)/CuS-20%as a cathode in MEC was(0.2031±0.0237)m^(3)_(H_(2))·m^(-3)·d^(-1) for 72 h at an applied voltage of 0.8 V,which was slightly higher than that of Pt mesh of(0.1886±0.0134)m^(3)_(H_(2))·m^(-3)·d^(-1).The addition of a certain amount of CuS not only regulates the electron transfer ability of MoS_(2) but also increases the density of active sites.展开更多
基金Key Research and Development Program of Shaanxi Province(2022GY-410)Funding of Western Titanium Technologies Co.,Ltd(WX2210)。
文摘Based on the microstructure characterization,electrochemical impedance spectroscopy,potentiodynamic polarization,and immersion corrosion,this work comparatively analyzed the differences in the electrochemical corrosion morphology and post-foil formation surface morphology of laser beam welded(LBW)sample and spin-formed sample,and compared the corrosion resistance and Cu foil formation ability of two samples in H_(2)SO_(4)/NaCl solution and CuSO_(4) reducing electrolyte.Results show that in H_(2)SO_(4) and NaCl solutions,LBW sample and spin-formed sample exhibit excellent passivation ability and corrosion resistance.Both samples show uniform corrosion morphologies and similar corrosion resistance in the strong acidic solution containing Cl^(-).Meanwhile,the Cu foil formation ability of the welded joint is similar to that of the spin-formed sample,and both samples obtain intact Cu foils with high-quality surfaces and small differences in properties.
基金National Natural Science Foundation of China (22269010)Jiangxi Provincial Natural Science Foundation (20224BAB214021)Major Research Program of Jingdezhen Ceramic Industry (2023ZDGG002)。
基金financially supported by the Key Project of Research and Development Plan of Jiangxi Province(Nos.20223BBG74006 and 20201BBE51007)the National Science Foundation of China(No.52060018)the National Science Fund for Distinguished Young Scholars(No.52125002)。
文摘The efficient and environmentally friendly recycling technology of waste residue that including abundant heavy metal produced during the recovery of lithium batteries has become a research hotspot.Herein,a novelty process of acid leaching-selective electrodeposition-deep impurity removal-regeneration was proposed to recovery of the CuS slag,which has been efficient transferred to high purity cathode copper and commercially available ternary precursors.Copper cathode with a purity of 99.67%was prepared under electrochemical reaction conditions at-0.55 V for 2 h.A novel impurity remover-Mn powder,which was used to remove the residual impurities and as a feedstock for the ternary precursor.Finally,NCM523 was regenerated by co-precipitation.The process is superior to the traditional process in economy,energy consumption,CO_(2)emissions,product purity and process duration.This study provides a new approach for solid waste recovery and precious metal enrichment.
文摘采用水热合成法制备了CuS_(x)催化剂,通过改变前驱体铜硫比〔n(Cu)∶n(S)〕,调控催化剂形貌和反应路径。将CuS_(x)催化剂用于温和电势下CO_(2)高效电催化还原制CO反应。采用XRD、FESEM和XPS对CuS_(x)催化剂进行了表征,探究了铜硫比对CuS_(x)催化剂电催化CO_(2)还原“构效关系”的影响。结果表明,铜硫比影响CuS晶体成核与生长,进而影响CuS_(x)催化剂的形貌和S空位缺陷。当铜硫比在2∶1~1∶4内变化,CuS_(x)催化剂的形貌由荷花状转化为花球状,S空位含量由20.66%提高至63.37%,CO_(2)电催化还原活性和目标产物CO选择性明显提升。由铜硫比为1∶4制备的CuS_(x)催化剂(CuS-1∶4)在0.1 mol/L的KHCO3电解液中,在–0.51 V vs.RHE(可逆氢电极)的温和电势下,CO选择性达72.67%。CuS-1∶4优异的CO_(2)还原性能归因于催化剂花球状形貌、高比表面积和气体扩散通道提供的不饱和活性位点促进了气体扩散,以及S空位缺陷对电子传递和*COOH中间体在催化剂表面吸附的强化作用。
基金funded by the National College Student Innovation and Entrepreneurship Training Program(No.GJ202323011)。
文摘In this study,the hydrothermal method was employed to grow submicron CuS on carbon cloth(CC),and the photoreduction method was used to grow Ag nanoparticles on the CuS submicron flowers,thus forming the Ag/CuS/CC catalytic electrode.The application of Ag/CuS/CC electrode-coupled dielectric barrier discharge(DBD)plasma in the disinfection of pathogenic bacteria in water was studied.The Ag/CuS/CC electrode exhibits strong antibacterial activity,and under an external voltage of 30 V,the degradation efficiency of Bacillus subtilis reaches 99.99%within 15 min without regeneration.After five cycles,the inactivation rate of Bacillus subtilis reached 99.99%within 25 min.The practical applicability of the Ag/CuS/CC-coupled DBD system for treating actual wastewater was evaluated,and the changes in biological toxicity were investigated.The results indicate that the prepared Ag/CuS/CC coupled DBD has great potential for safe disinfection of pathogenic bacteria in water through integrated processes.
基金This research was sponsored by the key research program of Ningbo(No.2023Z210)funded by Ningbo Natural Science Foundation(No.202003N4006)the Joint Research Funds of Department of Science&Technology of Shaanxi Province,Northwestern Polytechnical University(No.2020GXLH-Z-017).
文摘Cervical cancer stands is a formidablemalignancy that poses a significant threat towomen’s health.Calcium overload,a minimally invasive tumor treatment,aims to accumulate an excessive concentration of Ca^(2+)within mitochondria,triggering apoptosis.Copper sulfide(CuS)represents a photothermal mediator for tumor hyperthermia.However,relying solely on thermotherapy often proves insufficient in controlling tumor growth.Curcumin(CUR),an herbal compound with anti-cancer properties,inhibits the efflux of exogenous Ca^(2+)while promoting its excretion from the endoplasmic reticulum into the cytoplasm.To harness these therapeutic modalities,we have developed a nanoplatform that incorporates hollow CuS nanoparticles(NPs)adorned with multiple CaCO_(3) particles and internally loaded with CUR.This nanocomposite exhibits high uptake and easy escape from lysosomes,along with the degradation of surrounding CaCO3,provoking the generation of abundant exogenous Ca^(2+)in situ,ultimately damaging the mitochondria of diseased cells.Impressively,under laser excitation,the CuS NPs demonstrate a photothermal effect that accelerates the degradation of CaCO_(3),synergistically enhancing the antitumor effect through photothermal therapy.Additionally,fluorescence imaging reveals the distribution of these nanovehicles in vivo,indicating their effective accumulation at the tumor site.This nanoplatform shows promising outcomes for tumor-targeting and the effective treatment in a murine model of cervical cancer,achieved through cascade enhancement of calcium overload-based dual therapy.
文摘MoS_(2)/CuS composite catalysts were successfully synthesized using a one-step hydrothermal method with sodium molybdate dihydrate,thiourea,oxalic acid,and copper nitrate trihydrate as raw materials.The hydrogen pro-duction performance of MoS_(2)/CuS prepared with different molar ratios of Mo to Cu precursors(n_(Mo)∶n_(Cu))as cathodic catalysts was investigated in the two-chamber microbial electrolytic cell(MEC).X-ray diffraction(XRD),X-ray pho-toelectron spectroscopy(XPS),scanning electron microscopy(SEM),transmission electron microscope(TEM),linear scanning voltammetry(LSV),electrochemical impedance analysis(EIS),and cyclic voltammetry(CV)were used to characterize the synthesized catalysts for testing and analyzing the hydrogen-producing performance.The results showed that the hydrogen evolution performance of MoS_(2)/CuS-20%(nMo∶nCu=5∶1)was better than that of platinum(Pt)mesh,and the hydrogen production rate of MoS_(2)/CuS-20%as a cathode in MEC was(0.2031±0.0237)m^(3)_(H_(2))·m^(-3)·d^(-1) for 72 h at an applied voltage of 0.8 V,which was slightly higher than that of Pt mesh of(0.1886±0.0134)m^(3)_(H_(2))·m^(-3)·d^(-1).The addition of a certain amount of CuS not only regulates the electron transfer ability of MoS_(2) but also increases the density of active sites.
