Defective polymeric carbon nitride: Fabrications, photocatalytic applications and perspectives
Defective polymeric carbon nitride: Fabrications, photocatalytic applications and perspectives
复制标题
有缺陷的聚合氮化碳：制造、光催化应用和前景
DOI：
10.1016/j.cej.2021.130991
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发表时间：
2022
影响因子：
15.1
通讯作者：
Zhibin Wu
中科院分区：
文献类型：
--
作者：
Jinjuan Yang;Hou Wang;Longbo Jiang;Hanbo Yu;Yanlan Zhao;Haoyun Chen;Xingzhong Yuan;Jie Liang;Hui Li;Zhibin Wu
聚合氮化碳（CN）作为一种具有合适禁带宽度的无金属光催化剂，越来越受到人们的关注。然而，原始CN具有有限的可见光吸收范围，并且还遭受光激发的电荷载流子的高复合率，导致光催化活性低。随着现代材料表征技术和电子结构计算技术的发展，人们发现CN中的空位缺陷在决定光催化反应的动力学、能量学和机理方面起着更加决定性的作用。因此，在过去的几年里，人们做了很多努力，通过缺陷控制来提高CN的可见光活性。本文综述了近年来制备缺陷碳纳米管的研究进展和技术，系统地总结了自底向上和自顶向下的制备方法。同时，对缺陷CN光催化剂在水氧化、制氢、CO2还原、固氮、H2O2和有机合成以及污染物去除等方面的应用前景进行了讨论。最后，提出了空位缺陷型CN光催化剂存在的机遇和挑战，以突出该领域的发展方向。本文的研究为缺陷石墨氮化碳的制备提供了理论依据和指导。
Polymeric carbon nitride (CN) as a metal-free photocatalyst with suitable band gap has attracted increasing attention. However, pristine CN has a limited visible-light absorption range and also suffers a high recombination rate of photo-excited charge carriers, resulting in low photocatalytic activity. With the development of modern material characterization technology and electronic structure calculation technology, it is found that vacancy defects in CN play a more decisive role in determining the kinetics, energetics and mechanism of photocatalytic reactions. Therefore, much effort has been made in the past years to enhance the visible light activity of CN through defects control. This review provides the recent progresses and technologies on fabricating defective CN, in which the bottom-up and top-down preparation strategies are systematically summarized. In the meantime, the advancement of defective CN photocatalysts toward versatile applications such as water oxidation, hydrogen production, CO2reduction, nitrogen fixation, H2O2and organic synthesis, and pollutants removal are fully discussed. Finally, the existing opportunities and challenges of CN photocatalysts designed with vacancies defects are proposed to highlight the development direction of this field. This paper can lay a theoretical basis and guidance for the preparation of defective graphitic carbon nitride.
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DOI：
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发表时间：
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期刊：
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影响因子：
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