基于响应面的可见光催化材料制备与优化

为使TiO2能在可见光作用下发挥光催化作用,并易于从水中分离,将掺有稀土金属离子Er3+的上转换发光剂Er3+:YAlO3与TiO2采用溶胶-凝胶法结合,再将其负载于聚氨酯海绵(PS)载体表面,制备Er3+:YAlO3/TiO2-PS光催化剂。利用响应面(RSM)方法对光催化材料制备条件进行优化,根据中心组合设计方法设计出3因素5水平析因实验,以光催化剂对苯酚的降解率作为响应值,得到最佳的催化剂制备条件:在水热处理温度110~114℃、光催化剂中TiO2质量浓度60~65mg/L、海绵/溶胶负载比20g/L时苯酚降解率最佳,与实测结果相符。

Preparation and Optimization of the Photocatalytic Materials Under Visible Light with Response Surface Methodology

In order to develop the high photocatalytic performance of TiO 2 under visible light and make it easy to be separated from the treated liquid ,a visible light response photocatalyst is prepared through doping of the upconversion luminescence agent Er3 + :YAlO3 with TiO2 ,and immobilizing Er3 + :YAlO3 /TiO2 on the surface of Polyurethane Sponge (PS) by use of sol‐gel method .Based on the surface response methodology (RSM ) ,an experiment is designed to assess the individual and interaction effects of the three operating parameters (hydrothermal treatment temperature ,TiO2 concentration ,and PS‐to‐TiO2 sol ratio ) on the efficiency of phenol removal .The corresponding optimum preparing conditions are 110 114 ℃ ,60 65 mg /L ,and 20 g/L .The measured efficiency of phenol removal is maximijed under these conditions .