杂多钨酸盐/PANI/TiO_2三元复合催化剂的制备及光催化性能

Preparation and photocatalytic performance of ternary composite catalyst heteropolysilicotungstate/PANI/TiO_2

以过硫酸铵为氧化剂,制备了复合光催化材料α-Si W11Ti/PANI/Ti O2。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Ti O2和二元催化剂/PAIN/Ti O2比较,三元催化剂Si W11Ti/PANI/Ti O2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%。

The nanocomposite α-Si W11 Ti/PANI/Ti O2 possessing high photocatalytic activity was prepared by（ NH4）2S2O8as an oxidant. The structures and morphologies of the nanocomposite Si W11 Ti/PANI/Ti O2 were well-characterized by UV-Vis,FT-IR,XRD and scanning electron microscopy assisted X-ray energy dispersive spectroscopy（ SEM-EDS）. N2adsorption-desorption showed that the composite had bimodal pore systems for mesoporous materials. The average pore diameter was ca 20. 07 nm and 26. 69 nm. The photocatalytic activities of composites were investigated for the degradation of congo red as a probe under the illumination of UV. Compared with Ti O2 and PANI/Ti O2,the ternary composite photocatalyst of Si W11 Ti/PANI/Ti O2 showed higher photocatalytic performance,and the photodegradation rate of congo red（ 15 mg/L） could reach 92. 44% under 30 W ultraviolet light for 150 min,The composite material had fine photocatalytic activities for many dyes。