Photocatalytic Activity Enhancing for Titanium Dioxide by Co-doping with Bromine and Chlorine

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• 作者：Hongmei Luo ; Tsuyoshi Takata ; Yungi Lee ; Jinfeng Zhao ; Kazunari Domen ; and Yushan Yan
• 刊名：Chemistry of Materials
• 出版年：2004
• 出版时间：March 9, 2004
• 年：2004
• 卷：16
• 期：5
• 页码：846 - 849
• 全文大小：96K
• 年卷期：v.16,no.5(March 9, 2004)
• ISSN：1520-5002

文摘

Bromine and chlorine co-doped nanocrystalline titanium dioxide are synthesized by ahydrothermal method using titanium chloride in a mixed hydrobromic acid-ethanol system.TiO₂ with anatase, mixed anatase/rutile, rutile, mixed rutile/brookite, mixed anatase/rutile/brookite, and rutile phases are obtained, in that order, by increasing the acidity throughaddition of HBr. Br^- and Cl^- co-doping causes the absorption edge of TiO₂ to shift to a lowerenergy region. The photocatalytic activity of doped TiO₂ with mixed anatase/rutile phasesexceeds that of commercial TiO₂ photocatalyst Degussa P-25 for water splitting into H₂ andO₂ under ultraviolet light.