One-Pot Fabrication of C鈥揊e-Codoped TiO2 Sheets with Dominant {001} Facets for Enhanced Visible Light Photocatalytic Activity

详细信息    查看全文

• 作者：Dong Yang ; Yuanbing Li ; Zhenwei Tong ; Yuanyuan Sun ; Zhongyi Jiang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：December 10, 2014
• 年：2014
• 卷：53
• 期：49
• 页码：19249-19256
• 全文大小：522K
• ISSN：1520-5045

文摘

C鈥揊e-codoped TiO₂ sheets (CFTS) with dominant {001} facets have been synthesized by a one-pot hydrothermal approach using TiC and Fe₂O₃ as the reactants in a HNO₃鈥揌F mixed solution. The obtained CFTS samples appear as the aggregates of highly truncated bipyramidal microsheets with the length of 1鈥? 渭m and the thickness of 100鈥?00 nm. The doped C atoms exist as the O鈥揟i鈥揅 structure or interstitial C in TiO₂ lattice, while the doped Fe atoms replace some of Ti⁴⁺ to form the Ti鈥揙鈥揊e structure. In comparison with the C-doped TiO₂ sheets, all CFTS samples exhibit a narrower band gap, stronger visible light absorption, and higher separation efficiency of photogenerated carriers. Moreover, when the atomic ratio of Fe to Ti is 1%, the CFTS sample shows the highest photocatalytic activity by measuring the decomposition rate of RhB under visible light. These CFTS materials may become promising visible light photocatalysts for organic pollutant degradation and efficient H₂ evolution.