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在微波辐照干化的条件下用溶胶-凝胶法制备了MWNTs/TiO2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400 W,MWNTs/TiO2复合材料管径逐渐变小,且在400 W时制备的MWNTs/TiO2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/TiO2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400 W、辐照时间为5 min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 7 min-1,该值比非微波加热干化的同样复合材料的反应速率常数值提高了52%.
The MWNTs / TiO2 composite photocatalyst was prepared by sol-gel method under microwave radiation drying conditions.The characterization of the composite showed that with the microwave power increasing to 400 W, the diameter of MWNTs / TiO2 composite And the MWNTs / TiO2 composites prepared at 400 W have better dispersibility.When the microwave power is further increased, the diameter of the composite increases and the dispersibility decreases.The MWNTs prepared under different microwave irradiation conditions / TiO2 composite photocatalyst 1,2,3-trichlorobenzene photocatalytic degradation of the results showed that the composite photocatalyst 1,2,3-trichlorobenzene photodegradation follow the first-order reaction kinetics; in the microwave The degradation rate of 1,2,3-trichlorobenzene was the fastest with the power of 400 W and the irradiation time of 5 min, and its reaction constant was 0.023 7 min-1, which was higher than that of non-microwave heating The same composite material was cured with a 52% increase in reaction rate constant.