论文部分内容阅读
采用超声辅助溶胶-凝胶法,以钛酸丁酯为原料,尿素为N源,硝酸镧为La源,制备了N与La共掺杂纳米TiO_2/电气石复合材料。采用XRD、UV-Vis、SEM-EDS和XPS对复合材料的结构和性能进行了表征。以2,4,6-三硝基甲苯作为目标污染物,考察了N与La共掺杂纳米TiO_2/电气石复合材料的光催化活性及再生利用性能。结果表明:N与La共掺杂并负载电气石后,两者协同作用使TiO_2晶粒更加细化,光吸收范围向可见光区拓展,N与La共掺杂纳米TiO_2/电气石复合材料具有良好的光催化活性和再生利用性能,且在模拟可见光照射条件下对2,4,6-三硝基甲苯具有良好的去除效果。
The nano-TiO 2 / tourmaline composite was prepared by ultrasonic assisted sol-gel method with butyl titanate as raw material, urea as N source and lanthanum nitrate as La source. The structure and properties of the composites were characterized by XRD, UV-Vis, SEM-EDS and XPS. Using 2,4,6-trinitrotoluene as the target pollutant, the photocatalytic activity and regeneration performance of N and La co-doped nano-TiO 2 / tourmaline composite were investigated. The results show that the co-doping of N with La and the loading of tourmaline, the synergistic effect of the two makes the grain refinement of TiO_2, the light absorption range extends to the visible region, N and La co-doped nano-TiO 2 / tourmaline composite material has good Of photocatalytic activity and recycling performance, and under the conditions of visible light irradiation 2,4,6-trinitrotoluene has a good removal effect.