期刊论文

中文

环境科学

0250-3301

2012

33

11

3840-3846

10.13227/j.hjkx.2012.11.013

湖南省自然科学基金项目（08JJ3103）；

本校为其他机构

在微波辐照干化的条件下用溶胶-凝胶法制备了MWNTs/TiO_2复合光催化剂.对该复合材料的表征表明:随着微波功率逐渐增大至400W,MWNTs/TiO_2复合材料管径逐渐变小,且在400W时制备的MWNTs/TiO_2复合材料分散性较好.进一步增大微波功率导致复合材料的管径增大,分散性降低.研究了不同微波辐照条件下制备的MWNTs/TiO_2复合光催化剂对1,2,3-三氯苯的光催化降解效果,结果表明,该复合光催化剂对1,2,3-三氯苯的光降解遵循一级反应动力学;在微波功率为400W、辐照时间为5min情况下制备的复合光催化剂对1,2,3-三氯苯的降解速率最快,其反应常数为0.0237min~(-1),该值比非微波加热干化的同样复合材料的反应速率...

Composite photocatalyst, MWNTs/TiO2, is prepared using sol-gel method and dried through microwave irradiation. Characterization of the composite shows that, with the increase of microwave power till 400 W, the average diameter of MWNTs/TiO2 composite reduces gradually, and better dispersion of the composites is also acquired at the microwave power of 400 W. However, a further increase of the power results in the average diameter of the composite enlarged, and more aggregative composites are obtained. Furthermore, photodegradation of 1,2,3-trichlorobenzene (1,2,3-TCB) with the composite photoca...