CAI Tiejun1; LIAO Yuchao2; PENG Zhenshan1; LONG Yunfei1; WEI Zongyuan1; DENG Qian1
Source Publicationjournalofenvironmentalsciences
AbstractThe binary composite photo-catalysts CeO2/TiO2, ZrO2/TiO2 and the ternary composite photo-catalysts H3PW12O40-CeO2/TiO2, H3PW12O40-ZrO2/TiO2 were prepared by sol-gel method. The catalysts were characterized by thermogravimetric-differential thermal analysis (TG-DTA), scanning electron microscopy (SEM) and X-ray diffraction (XRD). The photocatalytic elimination of methanol was used as model reaction to evaluate the photocatalytic activity of the composite catalysts under ultraviolet light irradiation. The effects of doped content, activation temperature, time, initial concentration of methanol and gas flow rate on the catalytic activity were investigated. The results showed that after doping a certain amount of CeO2 and ZrO2, crystallization process of TiO2 Was restrained, particles of catalysts are smaller and more uniform. Doping ZrO2 not only significantly improved the catalytic activity, but also increased thermal stability. Doping H3PW12O40 also enhanced the catalytic activity. The catalytic activities of binary and ternary composite photocatalysts were significantly higher than un-dopcd TiO2. The dynamics law of photocatalytic reaction over the binary CeO2/TiO2 and ZrO2/TiO2 catalysts has been studied. The activation energy 15.627 and 15.631 kJ/mol and pre-exponential factors 0.5176 and 0.9899 s(-1) over each corresponding catalyst were obtained. This reaction accords to the first order dynamics law.
Funding Project[Hunan Provincial Natural Science Foundation] ; [Scientific Research Fund of Education Department and the Organic Chemistry Key Subject]
Document Type期刊论文
Recommended Citation
GB/T 7714
CAI Tiejun,LIAO Yuchao,PENG Zhenshan,et al. photocatalyticperformanceoftio2catalystsmodifiedbyh3pw12o40zro2andceo2[J]. journalofenvironmentalsciences,2009,21(7):997.
APA CAI Tiejun,LIAO Yuchao,PENG Zhenshan,LONG Yunfei,WEI Zongyuan,&DENG Qian.(2009).photocatalyticperformanceoftio2catalystsmodifiedbyh3pw12o40zro2andceo2.journalofenvironmentalsciences,21(7),997.
MLA CAI Tiejun,et al."photocatalyticperformanceoftio2catalystsmodifiedbyh3pw12o40zro2andceo2".journalofenvironmentalsciences 21.7(2009):997.
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