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首页> 外文期刊>Chemistry: A European journal >Crystallinity Modulation of Layered Carbon Nitride for Enhanced Photocatalytic Activities
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Crystallinity Modulation of Layered Carbon Nitride for Enhanced Photocatalytic Activities

机译：层状氮化碳的结晶度调节可增强光催化活性

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摘要

As an emerging metal-free semiconductor, covalently bonded carbon nitride (CN) has attracted much attention in photocatalysis. However, drawbacks such as a high recombination rate of excited electrons and holes hinder its potential applications. Tailoring the crystallinity of semiconductors is an important way to suppress unwanted charge recombination, but has rarely been applied to CN so far. Herein, a simple method to synthesize CN of high crystallinity by protonation of specific intermediate species during conventional polymerization is reported. Interestingly, the as-obtained CN exhibited improved photocatalytic activities of up to seven times those of the conventional bulk CN. This approach, with only a slight change to the conventional method, provides a facile way to effectively regulate the crystallinity of bulk CN to improve its photocatalytic activities and sheds light on large-scale industrial applications of CN with high efficiency for sustainable energy.
机译：作为新兴的无金属半导体，共价键合的氮化碳（CN）在光催化中引起了很多关注。但是，诸如激发电子和空穴的高复合率之类的缺点阻碍了其潜在的应用。调整半导体的结晶度是抑制不想要的电荷复合的重要方法，但是到目前为止，很少用于CN。在此，报道了一种在常规聚合过程中通过特定中间物种的质子化来合成高结晶性CN的简单方法。有趣的是，所获得的CN显示出提高的光催化活性，其高达常规本体CN的光催化活性的七倍。该方法仅对常规方法进行了少许改动，提供了一种简便的方法，可以有效地调节块状CN的结晶度以改善其光催化活性，并为高效可持续利用CN的大规模工业应用提供了参考。

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