Study on Photocatalytic Degradation of 1,2,3-Trichlorobenzene Using the Microwaved MWNTs/TiO2 Composite
微波改性MWNTs/TiO2复合材料对1,2,3-三氯苯的光催化降解研究

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 photocatalysts of MWNTs/TiO2 induced under different microwave conditions is studied. It is found that the photodegradation of 1,2,3-TCB follows the first-order kinetics. The microwaving conditions for producing the composite photocatalysts with the highest photocatalytic activity are further determined as 5min irradiation at 400 W. Under such conditions, the rate constant of 1,2,3-TCB photodegradation is 0.0237 min-1 which is elevated by 52% comparing to those obtained using non-microwaved composites.