Controllable synthesis of Titania-Supported Bismuth Oxyiodide Heterostructured Nanofibers with Highly Exposed (1 1 0) Bismuth Oxyiodide Facets for Enhanced Photocatalytic Activity

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• 作者：Shunqin Luo ; Prof. Dr. Jiawei Chen ; Prof. Dr. Zhaohui Huang ; Dr. Chen Liu and Prof. Dr. Minghao Fang
• 刊名：ChemCatChem
• 出版年：2016
• 出版时间：December 19, 2016
• 年：2016
• 卷：8
• 期：24
• 页码：3780-3789
• 全文大小：2708K
• ISSN：1867-3899

文摘

Bismuth oxyiodide/titanium dioxide (BiOI/TiO₂) heterostructured nanofibers with exposed (1 1 0) BiOI facets were synthesized by electrospinning and hydrothermal methods. The BiOI/TiO₂ heterostructures with exposed (1 1 0) BiOI facets exhibited an enhanced photoreactivity, for which the methylene blue and phenol degradation rate is increased by more than two times and the photocurrent density is 12 times as high as that of BiOI with exposed (1 1 0) facets. EPR spectroscopy indicated that the hydroxyl radicals and superoxide radicals could be generated by BiOI/TiO₂ heterostructures with exposed (1 1 0) BiOI facets. Based on the experimental results, the enhancement of the photocatalytic activity could be attributed to the strong oxidization by hydroxyl radicals, enlarged band gap, lowered valence band position, and suppressed recombination of photoinduced electron–hole pairs by the manipulation of heterostructures with exposed (1 1 0) BiOI reactive facets.