POMs/TiO2复合催化剂光催化降解染料废水的研究

采用溶胶-凝胶方法表面修饰TiO2制备了几种POMs/TiO2复合光催化剂,考察了催化剂在紫外光照射下对模拟染料废水(茜素红溶液)的光催化降解行为.结果表明:POMs/TiO2复合催化剂较纯TiO2光催化降解茜素红活性明显提高,其中复合催化剂Cr3OSiW12/TiO2光催化降解模拟染料废水(茜素红溶液)效果最佳.反应最佳条件:催化剂为Cr3OSiW12/TiO2,多酸质量分数为0.5%,催化剂用量为15 mg,茜素红溶液浓度为0.1mmol/L.茜素红降解质量分数可达74.6%.

Photocatalytic degradation of dye wastewater by the composite catalyst of polyoxometalates(POMs) and titanium dioxide

It is reported that the investigation on photocatalytic degradation of dye wastewater(Alizarin Red solution) under UV light irradiation using the composite of POMs/TiO_2 as catalyst prepared by sel-gel method.The research results show that the photocatalytic activity of POMs/TiO_2 catalyst is higher than that of TiO_2,and the catalyst of Cr_3OSiW_(12)/TiO_2 has the best efficiency to the photocatalytic degradation of dye wastewater(Alizarin Red solution),this is because a synchronal effect of both POMs and TiO_2 catalysts.The optimum reactio condition is as follows.The amount of catalyst Cr_3OSiW_(12)/TiO_2(POMs content:0.5%) is 15 mg in 0.10 mmol/L Alizarin Red solution.Under the above condition,the percentage of degradation for Alizarin Red comes up to 74.6%.