One-Pot Hydrothermal Route to Synthesize the Bi-doped Anatase TiO2 Hollow Thin Sheets with Prior Facet Exposed for Enhanced Visible-Light-Driven Photocatalytic Activity

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• 作者：Weiwei Wang ; Dan Zhu ; Zhi Shen ; Jin Peng ; Jie Luo ; Xiaoheng Liu
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2016
• 出版时间：June 8, 2016
• 年：2016
• 卷：55
• 期：22
• 页码：6373-6383
• 全文大小：663K
• 年卷期：0
• ISSN：1520-5045

文摘

A simple one-pot hydrothermal synthesis route has been employed to fabricate the bismuth-doped (Bi-doped) anatase TiO₂ hollow thin sheets with {001} facets exposed. Controlling BiVO₄ precursor concentration plays a key role in tuning the morphology and the Bi doping concentration of TiO₂ hollow thin sheet catalysts. The photocatalytic activity of as-prepared catalysts was evaluated through the photodegradation of different organic dyes under visible light irradiation (>400 nm), including methylene blue (MB), methyl orange (MO), rhodamine-B (RhB), and p-nitroaniline (PNA). Results showed that the optimal dopant of 0.8 atom % Bi in TiO₂ achieved the best photocatalytic activity, especially for possessing a much higher photodegradation of PNA, which could be ascribed to the results of photoinduced charge separation and transfer combined with low bulk recombination of charge carriers. This discussion demonstrates that the design of new TiO₂ nanostructures for application in solar energy conversion could be easily achieved by coupling Bi cation-doping and active facets with hollow thin sheet morphology.