Nanostructured 3D Sunflower-like Bismuth Doped BiOClxBr1鈥?i>x Solid Solutions with Enhanced Visible Light Photocatalytic Activity as a Remarkably Efficient Technology

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• 作者：Hani Gnayem ; Yoel Sasson
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：August 20, 2015
• 年：2015
• 卷：119
• 期：33
• 页码：19201-19209
• 全文大小：592K
• ISSN：1932-7455

文摘

Following our report on the fabrication of BiOCl_xBr_1鈥?i>x (0 鈮?x 鈮?1) alloys, and via careful rational optimization and substantial tuning, we upgraded the previous photocatalytic system by means of a controlled doping with elemental bismuth particles. The latter leads to the formation of well-defined structures characterized by effective separation of electron鈥揾ole pairs and more reductive photoexcited electrons. These advanced semiconductors, specifically heterojunctioned doped alloys, were synthesized via a simple soft chemical route at room temperature and used for demonstrating the enhanced and complete mineralization of recalcitrant organic contaminants in water such as toluene, benzene, chlorobenzene, xylene, terephthalic acid, and benzoquinone. The molecular photocatalytic mechanism of the above degradation processes was thoroughly elucidated.