Enhanced Photocatalytic Activity of TiO2 Nanosheets by Doping with Cu for Chlorinated Solvent Pollutants Degradation

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• 作者：Landry Biyoghe Bi Ndong ; Murielle Primaelle Ibondou ; Xiaogang Gu ; Shuguang Lu ; Zhaofu Qiu ; Qian Sui ; Serge Maurice Mbadinga
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：January 29, 2014
• 年：2014
• 卷：53
• 期：4
• 页码：1368-1376
• 全文大小：479K
• ISSN：1520-5045

文摘

Photocatalytic of Cu-TiO₂ was tested for the degradation of 1.1.1-trichloroethane, tetrachloroethene, and trichloroethene in aqueous phase under UV illumination. Results indicated fast degradation rate of pollutants over TiO₂ doped with 0.5 wt % of Cu compared to undoped TiO₂ and Degussa P25. Fast degradation of nitrobenzene, a probe of hydroxyl radicals (^{鈥?/sup>OH), over Cu-TiO₂ suggested high concentration of 鈥?/sup>OH generated in UV/Cu-TiO₂ system. Cu-TiO₂, synthesized by simply hydrothermal solution containing tetrabutyl-titanate, hydrofluoric acid, and cupric nitrate, was characterized by X-ray diffraction, Brunauer鈥揈mmett鈥揟eller, transmission electron microscopy, and X-ray photoelectron spectroscopy (XPS). Results showed that Cu-TiO₂ was in anatase form and consisted of well-defined sheet-shaped structures having a rectangular outline. XPS analysis showed that surface state of the synthesized products was not modified by Cu doping and Cu was in Cu+ oxidation state. Moreover, Cu-TiO₂ product showed good stability through five cycles reuse in trichloroethene photodegradation, suggesting a great potential for its application in chlorinated solvent contaminated groundwater remediation.}