Journal
CHEMICAL SPECIATION AND BIOAVAILABILITY
Volume 29, Issue 1, Pages 60-69Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/09542299.2017.1315617
Keywords
Mo-TiO2; photocatalysis; heterojunction; toluene decomposition; VOCs
Funding
- National Key Research and Development Program of China [2016YFC0209203]
- Jiangsu Provincial Environmental Science Research Project of China [2015007]
- Jiangsu Collaborative Innovation Center for Ecological Building Materials and Environmental Protection Equipment Research Project of China [CP201504]
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The composite TiO2/Mo-TiO2 were prepared by a modified sol-gel method. The prepared catalysts were characterized by X-ray diffraction, BET analysis, SEM, X-ray photoelectron spectroscopy, and UV-vis diffused reflectance spectroscopy techniques. The structural characterization results demonstrated that Mo was successfully doped into the TiO2 lattice and caused slight changes in the physiochemical properties. The UV-vis DRS showed a red shift of the adsorption edge to the visible region. The photocatalytic decomposition efficiencies of the catalysts were examined with toluene as a typical VOC in a continuous flow reactor. The photocatalytic activity of the n-n heterogeneous TiO2/Mo-TiO2 was greater than that of pure TiO2 and Mo-TiO2, and the catalyst containing a Mo/Ti mole ratio of 2.5% exhibited optimum photocatalytic properties. In general, a relative humidity of 35%, a higher oxygen content, a lower initial toluene concentration, and a higher UV intensity were beneficial for toluene decomposition.
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