纳米WO3光催化降解苯酚废水的研究

通过气液反应制备纳米WO3粉体，并以WO3为光催化剂降解废水中的苯酚．采用正交试验，得出了各因素对降解效果影响的顺序：光照时间〉pH值〉WO3的用量；确定了反应最佳工艺条件：pH值为7．00，WO3用量为1．5g／L，光照6h，此时苯酚的降解率可达到89．64％．WO3对不同浓度的苯酚溶液均有较好的降解效果，但降解效果随苯酚浓度增大而下降．自制纳米WO3的光催化性能明显优于商品WO3．

Study of Photocatalytic Degradation of Phenol in WO3 Nano-powder Suspensoid

The photocatalytic degradation of phenol in WO3 nano-powder suspensoid is studied in this paper. The WO3 nano-powder has been prepared by method of gas-liquid reaction. The result shows that reaction time is the main influencing factor, the second one is pH value and the last one is amount of WO3 through the orthogonal experimental design method. At the same time, the optimization reaction conditions are obtained. When pH value is 7.00, amount of WO3 is 1.5 g/L and reaction time is 6 h, the removal rate is 89.64%. WO3 has good photocatalytic effect in different concentration of phenol. But when concentration increases, the photocatalytic activity decreases. The self-made WO3 nano-powder shows a much better photocatalytic activity than marketed one.