为了降低光生载流子的复合、提高光催化性能，采用水热晶化法制备了纳米薄片状In₂O₃与花球状ZnIn₂S₄异质结催化剂，并应用于光催化降解有机染料罗丹明B。结果表明，相比于纯In₂O₃和ZnIn₂S₄催化剂，In₂O₃/ZnIn₂S₄催化剂的活性有较大程度的提升；In₂O₃和ZnIn₂S₄质量比为1∶1的催化剂具有最好的光催化降解效果，光催化降解135 min时罗丹明B的降解率达到90.0%；其光催化反应的速率常数是纯ZnIn₂S₄的1.9倍，且符合拟一级动力学。In₂O₃/ZnIn₂S₄优异的光催化活性归因于In₂O₃和ZnIn₂S₄之间形成了异质结，加速了光生载流子迁移与分离。

In order to reduce the recombination of photo-generated carriers and improve the photocatalytic performance, nano-sheet In₂O₃/flower-like ZnIn₂S₄ heterojunction catalysts are prepared by a hydrothermal crystallization method, and applied to the photocatalytic degradation of organic dye Rhodamine B.The results show that the activity of In₂O₃/ZnIn₂S₄ catalyst is greatly improved compared with the pure In₂O₃ or ZnIn₂S₄ catalysts.The heterojunction catalyst with a 1:1 of mass ratio between In₂O₃ and ZnIn₂S₄ of has the best photocatalytic degradation effect.The degradation rate of Rhodamine B over the heterojunction catalyst reaches around 90.0% in 135 minutes, and the rate constant of its photocatalytic reaction is 1.9 times that of pure ZnIn₂S₄.The solution kinetic constant satisfies with pseudo-first-order kinetics.The superior photocatalytic activity of In₂O₃/ZnIn₂S₄ catalyst is attributed to the formation of heterojunction between In₂O₃ and ZnIn₂S₄, which accelerates the migration and separation of photogenerated carriers.

钟金玲(1983-),女,本科,讲师,研究方向为光催化水处理应用,jlzhong@ysu.edu.cn