Photocatalytic hydrogen generation in the presence of chloroacetic acids over Pt/TiO2.
In the presence of chloroacetic acids, the photocatalytic hydrogen evolution and decomposition of the pollutants over Pt/TiO2 have been investigated. The Pt/TiO2 was prepared by photodeposition. Monochloroacetic acid and dichloroacetic acid enhance photocatalytic hydrogen generation, whereas trichloroacetic acid does not. The photocatalytic oxidation of monochloroacetic acid and dichloroacetic acid mainly produces CO2, HCl and formaldehyde, whereas the photocatalytic oxidation of trichloroacetic acid mainly produces CO2 and HCl. The effect of the concentration of monochloroacetic acid and dichloroacetic acid on the hydrogen generation rate is consistent with a Langmuir-Hinshelwood kinetic model. A possible reaction mechanism was discussed.
Li
Yuexiang
Y
Department of Chemistry, Nanchang University, Nanchang, Jiangxi 330047, China. liyx@ncu.edu.cn
Xie
Yanzhao
Y
Peng
Shaoqin
S
Lu
Gongxuan
G
Li
Shuben
S
D000085:Acetates / Q000737:chemistry* / Q000528:radiation effects*; D000327:Adsorption; D002384:Catalysis; D004785:Environmental Pollutants / Q000528:radiation effects*; D006859:Hydrogen / Q000032:analysis / Q000737:chemistry*; D010777:Photochemistry; D010984:Platinum / Q000737:chemistry; D014025:Titanium / Q000737:chemistry; D014466:Ultraviolet Rays
D000085:Acetates; D004785:Environmental Pollutants; C009495:titanium dioxide; D010984:Platinum; D006859:Hydrogen; D014025:Titanium