Abstract
Photocatalytic technology holds great promise in renewable energy and environmental protection. Herein, we report the synthesis of a class of polyaniline-sensitized BiOCl core/shell nanosheets with visible-light photocatalytic activity by a one-step oxidative polymerization method and show how the hybrid nanosheet boosts the photocatalytic activity and stability for degradation of Rhodamine B (RhB). In this unique structure, the ultrathin polyaniline (PANI) as a shell with the thickness of about 1–2 nm, can widen the response of the catalyst to visible light to boost photocatalysis and the BiOCl core can promote the separation of photogenerated carriers from the PANI. We demonstrate that the optimized BiOCl/PANI core/shell photocatalyst shows nearly three times higher photocatalytic activity for the degradation of RhB than pure BiOCl and also shows high stability. This work provides a new strategy for the design of a highly efficient hybrid photocatalyst driven by visible light.
摘要
光催化技术在可再生能源和环境保护方面有巨大的潜力. 本文通过一步氧化聚合法合成了一种超薄聚苯胺壳敏化氯氧化铋核纳米片结构. 该结构中约1–2纳米厚的超薄聚苯胺壳可以促进催化剂对可见光的响应, 氯氧化铋核可以促进聚苯胺中光生载流子的分离, 在可见光驱动下对于降解罗丹明B具有较高的光催化活性和稳定性. 优化后的氯氧化铋/超薄聚苯胺核壳催化剂的光催化降解罗丹明B的活性比纯氯氧化铋高出近三倍, 且稳定性更高. 本工作为设计可见光驱动的高效混合光催化剂提供了一种新的策略.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (51772255), Hunan Natural Science Foundation (2016JJ3123), the National Key Research and Development Program of China (2016YFB0100201) and the start-up supports from Peking University and Young Thousand Talented Program.
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Yonghua Tang is a graduate student at Xiangtan University. He is currently studying in the College of Engineering of Peking University. His research focuses on the synthesis of nanostructures and their applications in photocatalytic degradation and hydrogen production.
Hongxing Li is a professor at Xiangtan University. His research focuses on the synthesis and application of nanostructured materials and photoelectrochemistry.
Shaojun Guo is currently a professor of materials science and engineering with a joint appointment at the Department of Energy & Resources Engineering at the College of Engineering, Peking University. He received his BSc in chemistry from Jilin University (2005), PhD, in analytical chemistry from the Chinese Academy of Sciences (2010), worked as a postdoctoral research associate from Jan. 2011 to Jun. 2013 at Brown University and earned the very prestigious position of J. Robert Oppenheimer Distinguished Fellow at Los Alamos National Laboratory. In 2014–2017, he was selected by Thomson Reuters into their prestigious list of the world’s most Highly Cited Researchers. His research interests are in engineering nanocrystals and 2D materials for catalysis, renewable energy, sensors, and therapy.
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BiOCl/ultrathin polyaniline core/shell nanosheets with a sensitization mechanism for efficient visible-light-driven photocatalysis
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Tang, Y., Zhou, P., Wang, K. et al. BiOCl/ultrathin polyaniline core/shell nanosheets with a sensitization mechanism for efficient visible-light-driven photocatalysis. Sci. China Mater. 62, 95–102 (2019). https://doi.org/10.1007/s40843-018-9284-0
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DOI: https://doi.org/10.1007/s40843-018-9284-0