可见光响应的“Cu核-Cu_2O壳”型光催化剂性能的研究

Study on photocatalytic properties of visible light-responsive "Cu core and Cu_2O shell" type of catalyst

以碱性染料结晶紫为目标污染物,金属卤化物灯为可见光光源,研究了自制的“Cu核-Cu2O壳”微粒的光催化性能。实验结果表明,该催化剂对可见光有良好的响应,当固液比为1∶500,光照120 min,质量浓度为60 mg/L的结晶紫溶液色度和COD去除率分别达98%和92%。检测结果表明,光催化过程中有氢氧自由基产生,染料发生了彻底的降解。

The photocatalytic properties of “Cu core and Cu2O shell” type of catalyst have been studied with crystal violet as model pollutant to degrade and a metallic halide lamp as a visible light source. The results showed that this new catalyst was highly responsive to visible light. When with 2 g/L of catalyst powder, 60 mg/L of crystal violet concentration, 120 rain of irradiation with visible light resource, and 1：500 of solid to liquid ratio, the decolorization rate of crystal violet and COD removal rate can be more than 98% and 92% , respectively. Hydroxyl radicals can be detected during the photocatalytic degradation process,and those radicals induced dye to degrade completely,as the results indicated.