Photocatalytic decomposition of CCl4 on Zr-MCM-41

Photocatalytic decomposition of CCl4 (80 mg L(-1) in H2O) effected by Zr-MCM-41 (Zr incorporated in the amorphous wall of MCM-41) has been studied in the present work. Experimentally, photocatalytic decomposition of CCl4 on Zr-MCM-41 was enhanced by about 1.96 times over that on ZrO2. Photocatalytic...

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Bibliographic Details
Published in:Journal of hazardous materials 2008-03, Vol.151 (2-3), p.461-464
Main Authors: CHIEN, Y.-C, WANG, H. Paul, LIU, S.-H, HSIUNG, T. L, TAI, H.-S, PENG, C.-Y
Format: Article
Language:English
Subjects:
Applied sciences
Carbon Tetrachloride - analysis
Carbon Tetrachloride - chemistry
Catalysis
Catalytic reactions
Chemical engineering
Chemistry
Chemistry Techniques, Analytical - methods
Equipment Design
Exact sciences and technology
General and physical chemistry
Hydrogen - chemistry
Photochemistry - methods
Photolysis
Pollution
Reactors
Silicon Dioxide - chemistry
Spectrophotometry, Ultraviolet - methods
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Time Factors
Water - chemistry
X-Ray Diffraction
Zirconium - analysis
Zirconium - chemistry
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Summary:Photocatalytic decomposition of CCl4 (80 mg L(-1) in H2O) effected by Zr-MCM-41 (Zr incorporated in the amorphous wall of MCM-41) has been studied in the present work. Experimentally, photocatalytic decomposition of CCl4 on Zr-MCM-41 was enhanced by about 1.96 times over that on ZrO2. Photocatalytic decomposition of CCl4 may proceed via a two-electron transfer process that yields mainly CHCl3, Cl- and H2. Since little C2Cl2, C2Cl6 or CH2Cl2 was found, it is unlikely that CHCl3 involved in the secondary photocatalytic degradation process. In addition, photocatalytic splitting of H2O on Zr-MCM-41 was also enhanced. The yield of H2 was 6.5 mmol(gZrO2)(-1). About 68% of this hydrogen (6.5 mmol(gZrO2)(-1)) was consumed in the photocatalytic decomposition of CCl4.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2007.06.027