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 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.
Chien
Y-C
YC
Department of Environmental Engineering and Science, Fooyin University, Kauhsiung County 831, Taiwan. pl036@mail.fy.edu.tw
Wang
H Paul
HP
Liu
S-H
SH
Hsiung
T L
TL
Tai
H-S
HS
Peng
C-Y
CY
D002251:Carbon Tetrachloride / Q000032:analysis* / Q000737:chemistry; D002384:Catalysis; D002623:Chemistry Techniques, Analytical / Q000379:methods*; D004867:Equipment Design; D006859:Hydrogen / Q000737:chemistry; D010777:Photochemistry / Q000379:methods*; D010782:Photolysis; D012822:Silicon Dioxide / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet / Q000379:methods; D013997:Time Factors; D014867:Water / Q000737:chemistry; D014961:X-Ray Diffraction; D015040:Zirconium / Q000032:analysis* / Q000737:chemistry
C509968:MCM-41; D014867:Water; D012822:Silicon Dioxide; D006859:Hydrogen; D015040:Zirconium; D002251:Carbon Tetrachloride