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首页> 外文期刊>Journal of industrial and engineering chemistry >Utilization of the internal electric field in semiconductor photocatalysis: A short review
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Utilization of the internal electric field in semiconductor photocatalysis: A short review

机译：半导体光电催化中内部电场的利用：简短回顾

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Photocatalysis denotes as an environmental friendly chemical transformation technique. The rate of photoinduced electron-hole recombination is one of the difficulties encountered in semiconductor photocatalysis. Different alternative systems were suggested to overcome this problem and thereby improve the efficiency of the photocatalyst. Extensively investigated methods were not effective to achieve the required efficiency of the catalyst, because the catalyst charge carrier separation is poor. Among the explored methods, the electron-hole separation using built-in electric field attracts considerable attention as a new concept. A spontaneous potential from the ferroelectric material strongly minimizes the number of photoinduced electron-hole recombination. On the other hand, the spontaneous potential was compensated by the external and internal charge and to alternate the electric field, thermal, mechanical and electric field were applied as an external force. The external force was exerted by different methods, including passage of ultrasound waves, fluid eddy, flowing water, mechanical distribution and changing the temperature. Preliminary work has been carried out using semiconductor-Ferroelectric nanohybrid piezophotocatalyst in environmental remediation for the removal of an organic color and non-colored pollutants. Later, the application was extended to hydrogen production from water splitting and antibacterial material development. Furthermore, the light free catalysts such as piezocatalyst, dark catalyst and vibration catalyst are also examined for last decades. In this review, we summarize the work carried out by the internal electric field induced photocatalyst electron-hole separation (Piezo photocatalyst) and temperature triggered catalyst (Pyrocatalyst). Light free or vibration catalyst (piezocatalyst) work also briefly covered in this review. Overall, the manuscript was discussed in four categories of materials, including BaTiO3, ZnO, other ABO3 structures and two-dimensional nanostructures including MoS2, WS2, MoSe2. The challenges encountered, and the present and future scope of the work is also discussed in this review. (C) 2018 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
机译：光催化表示为环保化学转化技术。光抑制电子 - 空穴重组的速率是半导体光催化中遇到的困难之一。建议不同的替代系统来克服这个问题，从而提高光催化剂的效率。广泛的研究方法无效地达到催化剂所需的效率，因为催化剂电荷载体分离差。在探索方法中，使用内置电场的电子孔分离吸引了相当大的关注作为新概念。来自铁电材料的自发电位强烈地最小化了光导电子 - 空穴重组的数量。另一方面，通过外部和内部电荷补偿自发电位，并将电场，热，机械和电场施加为外力。外力通过不同的方法施加，包括超声波，流体涡流，流动水，机械分配和改变温度的通过。在环境修复中使用半导体铁电纳米嗜型压佐催化剂进行了初步工作，用于去除有机颜色和无色污染物。后来，施用延伸至水分裂和抗菌材料发育的氢气产生。此外，还在去几十年中检查了诸如压电催化剂，暗催化剂和振动催化剂的光无游催化剂。在本文中，我们总结了内部电场诱导的光催化剂电子 - 空穴分离（压电催化剂）和温度触发催化剂（Pyrocatalyst）进行的工作。透光或振动催化剂（压电催化剂）也在本次审查中简要介绍。总体而言，在四种类别的材料中讨论了稿件，包括BATIO3，ZnO，其他ABO3结构和二维纳米结构，包括MOS2，WS2，MOSE2。在本次审查中还讨论了遇到的挑战，以及工作的现在和未来的范围。 （c）2018年韩国工程和工程化学学会。 elsevier b.v出版。保留所有权利。

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