杂多钨酸盐/PANI/TiO2三元复合催化剂的制备及光催化性能

摘要

The nanocompositeα-SiW11 Ti/PANI/TiO2 possessing high photocatalytic activity was prepared by( NH4 ) 2 S2 O8 as an oxi-dant. The structures and morphologies of the nanocomposite SiW11 Ti/PANI/TiO2 were well-characterized by UV-Vis,FT-IR,XRD and scanning electron microscopy assisted X-ray energy dispersive spectroscopy(SEM-EDS). N2 adsorption-desorption showed that the composite had bimodal pore systems for mesoporous materials. The average pore diameter was ca 20. 07nm and 26. 69nm. The photocatalytic activities of composites were investigated for the degradation of congo red as a probe under the illumination of UV. Compared with TiO2 and PANI/TiO2 ,the ternary composite photocatalyst of SiW11 Ti/PANI/TiO2 showed higher photocatalytic performance,and the photodegradation rate of congo red(15 mg/L) could reach 92. 44%under 30 W ultraviolet light for 150min, The composite material had fine photocatalytic activities for many dyes.%以过硫酸铵为氧化剂，制备了复合光催化材料α-SiW11 Ti/PANI/TiO2。用UV-Vis、IR、XRD和SEM-EDS等测试手段对其结构及形貌等进行了表征。 IR结果表明，复合后聚苯胺的IR振动峰发生红移。 N2吸附-脱附显示产物为介孔材料，具有双孔结构，平均孔径约为20．07nm 和26．69nm。以刚果红染料废水(15 mg/L)为探针反应，评价了其光催化性能，与一元催化剂TiO2和二元催化剂/PAIN/TiO2比较，三元催化剂SiW11 Ti/PANI/TiO2表现出更高的光催化降解性能，经30W紫外灯照射150min后，其降解率为92．44%。