SnS₂-based Composite Material Can Be Controlled And Its Performance Of Photocatalytic Reduction Of Cr???

in the list of priority pollutants.The visible light-driven semiconductor photocatalytic reduction of hexavalent chromium aqueous solution has simple and convenient operation,environmental protection,low cost,high efficiency,reusable,and can be used directly unlimited,Clean,safe natural solar energy and other obvious advantages,therefore,the semiconductor photocatalytic reduction method is an effective method to deal with Cr???aqueous solution.The semiconductor metal sulfide SnS₂ has strong visible light response,but due to photocorrosion,SnS₂ is unstable as a photocatalyst,and the photogenerated electrons and holes of SnS₂ are easily recombined with each other,resulting in poor photocatalytic performance and limiting its practical application.The research content of this paper is as follows:hydrothermal method,and based on SnS₂,composite Ni Al-LDH/SnS₂ with different amounts of Ni Al-LDH added was prepared by hydrothermal method.The effects of the amount of Ni Al-LDH added on the photocatalytic performance of the composite Ni Al-LDH/SnS₂ were investigated through characterization.At pH=3,the reduction of hexavalent chromium to trivalent chromium was used as a probe reaction to investigate the photocatalytic performance and stability of the composite Ni Al-LDH/SnS₂.According to the experimental results,when the addition amount of Ni Al-LDH is 0.02 g,Ni Al-LDH/SnS₂?0.02? has the best photocatalytic performance and better stability.Using SnS₂ as the substrate,composite Ni Fe-LDH/SnS₂ with different amounts of Ni Fe-LDH was successfully prepared in the reactor using hydrothermal method.Through experimental characterization,the effect of the amount of Ni Fe-LDH added on the photocatalytic performance of the composite Ni Fe-LDH/SnS₂was investigated.At p H=3,the reduction of hexavalent chromium to trivalent chromium was used as the probe reaction,and the photocatalytic performance and stability of the composite Ni Fe-LDH/SnS₂ were investigated.According to the experimental results,when the amount of Ni Fe-LDH added is 0.02 g,the photocatalytic efficiency of Ni Fe-LDH/SnS₂?0.02? is as high as 99.72%,and it has good stability.Using SnS₂ as the base,composite g-C₃N₄/SnS₂with different amounts of g-C₃N₄was successfully prepared in the reactor by hydrothermal method.Through experimental characterization,the effect of the amount of g-C₃N₄added on the photocatalytic performance of the composite g-C₃N₄/SnS₂ was investigated.At p H=3,the reduction of hexavalent chromium to trivalent chromium was used as a probe reaction to investigate the photocatalytic performance and stability of the composite g-C₃N₄/SnS₂.According to the experimental results,when the amount of g-C₃N₄ added is 0.07 g,the photocatalytic efficiency of g-C₃N₄/SnS₂?0.07?is as high as 100%,and it has good stability.