WO_3/N-TiO_2异质节可见光催化降解亚甲基蓝

WO_3/N-TiO_2 heterostructure with high visible-light-induced photo-catalytic activity for the degradation of methylene blue

以尿素为氮源,采用溶胶凝胶法制备N掺杂TiO_2,然后与钨酸铵混合研磨,通过高温焙烧的方法原位制备WO_3复合N掺杂TiO_2的异质节光催化材料。分别采用X射线衍射(XRD)、紫外-可见分光光度计(UV-Vis)对样品进行分析,考察样品的光吸收阈值变化。以亚甲基蓝为降解底物,考察了样品的可见光催化处理染料废水效果,结果表明,原位制备的WO_3和N掺杂TiO_2异质节光催化材料对亚甲基蓝表现出良好的可见光催化活性。

Using urea as th e nitrogen source,N-doped titania has been prepared by a sol-gel method. Then,it is mixed and ground with ammonium tungstate. Furthermore,the WO_3/N-TiO_2 heterostructure photo-catalytic material is in situ synthetized by a high temperature roasing method. The change of light absorption threshold values of the sample is investigated by means of XRD and UV-Vis. Using methylene blue as degradation substrate,the effect of the visiblelight photo-catalytic treatment on dyeing wastewater of the sample is also investigated. The results show that the in situ synthesized WO_3 and N-doped TiO_2 heterostructure photo-catalytic material exhibits favorable visible-light induced photo-catalytic activity for methylthionine blue.