title: [Study on photocatalytic degradation of 1, 2, 3-trichlorobenzene using the microwaved MWNTs/TiO2 composite].
abstract: 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 5 min irradiation at 400 W. Under such conditions, the rate constant of 1,2,3-TCB photodegradation is 0.023 7 min(-1) which is elevated by 52% comparing to those obtained using non-microwaved composites.
authors: College of Civil Engineering, Hunan University, Changsha 410082, China. zhous61@163.com
authors: Zhou
authors: Z
authors: Shi
authors: Qian
authors: Q
authors: Zhang
authors: Wei
authors: W
authors: Zhang
authors: Shun-Kai
authors: SK
authors: Xu
authors: Hua
authors: H
authors: Zhang
mesh_terms: D002384:Catalysis / Q000528:radiation effects; D002722:Chlorobenzenes / Q000737:chemistry / Q000302:isolation & purification*; D004785:Environmental Pollutants / Q000737:chemistry / Q000302:isolation & purification*; D052918:Environmental Restoration and Remediation; D008872:Microwaves; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010777:Photochemistry; D014025:Titanium / Q000737:chemistry*
chemical_list: D002722:Chlorobenzenes; D004785:Environmental Pollutants; D037742:Nanotubes, Carbon; C036720:trichlorobenzene; C009495:titanium dioxide; D014025:Titanium