Water pollution caused by heavy metals and antibiotics poses a significant global challenge,necessitating the development of efficient remediation strategies.In this study,zinc(Zn)doped CuFeS_(2)(copper iron sulfide)c...Water pollution caused by heavy metals and antibiotics poses a significant global challenge,necessitating the development of efficient remediation strategies.In this study,zinc(Zn)doped CuFeS_(2)(copper iron sulfide)com-posites were used as highly efficient photocatalysts for the degradation of hexavalent chromium(Cr(VI))and oxytetracycline(OTC)under visible light.The composites were synthesized using a facile hydrothermal method with various Zn doping concentrations(1 mol%,5 mol%,and 10 mol%).The synthesized composites were com-prehensively characterized by X-ray diffraction,field-emission scanning electron microscopy,Fourier-transform infrared spectroscopy,and Ultraviolet-Visible spectroscopy.X-ray photoelectron spectroscopy,and Brunauer-Emmett-Teller analysis revealed their structural,morphological,optical,and surface area properties.Among the composites,10 mol% CuFeS@Zn exhibited the highest degradation efficiency,achieving 99%Cr(VI)and OTC removal within 100 min.This performance significantly surpasses the efficiencies of CuFeS_(2),and the CuFeS_(2)@Zn 1 mol%,and CuFeS_(2)@Zn 5 mol% composites.Kinetic analysis revealed a high reaction rate constant of 3.041 min^(-1),and optimal photocatalytic activity was observed at pH 6 and a catalyst dosage of 6 mg,with excellent re-cyclability and stability demonstrated over multiple cycles for the CuFeS_(2)@Zn 10 mol%composite.The enhanced photocatalytic performance was attributed to the improved charge carrier separation and transfer resulting from Zn incorporation,which facilitated redox reactions at the catalyst-pollutant interface.This study provides valu-able insights into the design of Zn-doped CuFeS_(2) composites offering a promising pathway for the development of advanced photocatalytic materials for environmental remediation.展开更多
文摘Water pollution caused by heavy metals and antibiotics poses a significant global challenge,necessitating the development of efficient remediation strategies.In this study,zinc(Zn)doped CuFeS_(2)(copper iron sulfide)com-posites were used as highly efficient photocatalysts for the degradation of hexavalent chromium(Cr(VI))and oxytetracycline(OTC)under visible light.The composites were synthesized using a facile hydrothermal method with various Zn doping concentrations(1 mol%,5 mol%,and 10 mol%).The synthesized composites were com-prehensively characterized by X-ray diffraction,field-emission scanning electron microscopy,Fourier-transform infrared spectroscopy,and Ultraviolet-Visible spectroscopy.X-ray photoelectron spectroscopy,and Brunauer-Emmett-Teller analysis revealed their structural,morphological,optical,and surface area properties.Among the composites,10 mol% CuFeS@Zn exhibited the highest degradation efficiency,achieving 99%Cr(VI)and OTC removal within 100 min.This performance significantly surpasses the efficiencies of CuFeS_(2),and the CuFeS_(2)@Zn 1 mol%,and CuFeS_(2)@Zn 5 mol% composites.Kinetic analysis revealed a high reaction rate constant of 3.041 min^(-1),and optimal photocatalytic activity was observed at pH 6 and a catalyst dosage of 6 mg,with excellent re-cyclability and stability demonstrated over multiple cycles for the CuFeS_(2)@Zn 10 mol%composite.The enhanced photocatalytic performance was attributed to the improved charge carrier separation and transfer resulting from Zn incorporation,which facilitated redox reactions at the catalyst-pollutant interface.This study provides valu-able insights into the design of Zn-doped CuFeS_(2) composites offering a promising pathway for the development of advanced photocatalytic materials for environmental remediation.
