Investigation on a novel ZnO/TiO₂-B photocatalyst with enhanced visible photocatalytic activity

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• 作者：Wei Li ; Di Wu ; Yanlong Yu ; Peng Zhang ; Jing Yuan ; Yongqiang Cao ; Yaan Cao ; Jingjun Xu
• 关键词：Composite photocatalyst ; Visible light response ; Enhanced photocatalytic activity ; Boron doping
• 刊名：Physica E
• 出版年：April, 2014
• 年：2014
• 卷：58
• 期：Complete
• 页码：118-123
• 全文大小：1602 K

文摘

A new type of composite photocatalysts (ZnO/TiO₂-B) with Zinc oxide nanoparticles dispersed on boron doped titanium dioxide was prepared via a sol-gel method. The as-prepared powders were characterized by HRTEM, XRD, XPS, UV-vis DRS, and PL techniques. The results reveal that B³⁺ ions are doped into the TiO₂ lattice in interstitial mode, while ZnO nanoparticles are dispersed on the surface of TiO₂. The absorption of photocatalysts was extended into visible light region and the photogenerated electrons and holes were separated efficiently. Hence, ZnO/TiO₂-B composite photocatalyst exhibits much better photocatalytic activity than those of pure TiO₂ and TiO₂-B on photodegradation of 4-chlorophenol under visible light irradiation.