As a polymer semiconductor, the intrinsic structure (melon units) of graphitic carbon nitride (g-C₃N₄) can be modified by a facile co-polymerization approach. However, compared to the intensive research on doping or constructing a heterostructure etc., developing a co-polymerization strategy for improving the photocatalytic performance of g-C₃N₄ has received much less attention, owing to the lack of an appropriate polymerization route being exploited to introduce organic motifs into carbon nitride networks. In the present work, benzamide is employed as a new, low-cost co-monomer of urea to prepare the phenyl group functionalized g-C₃N₄ (CNPF) through a convenient one-pot thermal induction process. Introducing a phenyl group into the melon frame can essentially extend the original π-conjugation system of g-C₃N₄, leading to the improved visible light utilization and increased separation rate of electron–hole pairs. Furthermore, adding some benzamide into urea during the polymerization process enriches the pore structure of the as-obtained CNPF samples, resulting in a larger specific surface area. Under visible light irradiation, the as-prepared CNPF exhibits superior catalytic activity in a variety of photocatalytic systems, such as hydrogen generation from water, photo-degradation of dye and photo-reduction of Cr(VI).

中文翻译：

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制备具有扩展电子离域功能的苯基官能化gC ₃ N ₄纳米片，以增强可见光光催化活性†

作为聚合物半导体，可以通过简便的共聚方法来改性石墨碳氮化物（gC ₃ N ₄）的本征结构（瓜单元）。但是，与对掺杂或构造异质结构等的深入研究相比，由于缺乏适当的聚合途径来开发提高gC ₃ N ₄的光催化性能的共聚策略，因此受到的关注较少。将有机图案引入氮化碳网络。在目前的工作中，苯甲酰胺被用作一种新型的低成本尿素共聚单体，以制备苯基官能化的gC ₃ N _4。（CNPF）通过便捷的一锅热感应过程。在甜瓜框架中引入苯基​​可从本质上扩展gC ₃ N ₄的原始π共轭体系，从而提高可见光利用率并提高电子-空穴对的分离率。此外，在聚合过程中向尿素中添加一些苯甲酰胺会丰富所获得的CNPF样品的孔结构，从而导致更大的比表面积。在可见光照射下，所制备的CNPF在多种光催化体系中表现出优异的催化活性，例如从水中产生氢，染料的光降解和Cr（VI）的光还原。