Herein, La@M_xO_y/TiO₂ (M = V, Cr, Mn and Fe) composite catalysts were prepared based on the sol–gel method as an effective adsorbent and photocatalyst for the degradation of malachite green from an aqueous solution under UV–Vis light. Under experimental conditions, a maximum adsorption capacity of 57.10% for the malachite green dye was achieved with La@Fe₂O₃/TiO₂. Moreover, this composite showed 78.62% photodegradation efficiency for malachite green. A quadratic model constructed using the response surface method showed that the maximum efficiency of photodegradation of malachite green can be achieved at pH 11 and a process time of 35 min.

本文基于溶胶-凝胶法制备了La@M _x O _y /TiO ₂ (M = V、Cr、Mn和Fe)复合催化剂，作为有效的吸附剂和光催化剂，用于在水溶液中降解孔雀石绿。紫外-可见光。实验条件下，La@Fe ₂ O ₃ /TiO ₂对孔雀石绿染料的最大吸附容量为57.10%。此外，该复合材料对孔雀石绿的光降解效率为78.62%。使用响应面法构建的二次模型表明，在pH 11和处理时间35分钟时，孔雀石绿的光降解效率可以达到最大。