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Phenyl-grafted carbon nitride semiconductor for photocatalytic CO2-reduction and rapid degradation of organic dyes

机译：Phenyl-grafted碳氮化物半导体光催化二氧化碳减排和快速有机染料的降解

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摘要

Molecular engineering of graphitic carbon nitride (g-C3N4) is achieved by the copolymerization of -conjugated phenyl urea, melamine, and urea. Integration of aromatic phenyl rings into the heptazine network of g-C3N4 alters its structural, optical and electronic properties. The fusion of the polymeric g-C3N4 core with aromatic phenyl groups induces band gap tuning, which greatly improves the separation and lifetime of charge-carriers. As a result, CO2 photoreduction experiments conducted by using phenyl-grafted g-C3N4 afford methane and formic acid in high yields. Furthermore, a selective model organic pollutant rhodamine B dye is rapidly decomposed under visible-light irradiation. This work suggests that pyrolysis of a suitable aromatic -deficient molecular dopant such as phenyl urea can drastically alter the photo-response of the carbon nitride photocatalyst and may enhance its photocatalytic activity. Hence, the present work is expected to be of significant value in sustainable energy production and environmental remediation.
机译：分子工程石墨碳氮化(g-C3N4)是通过共聚共轭苯脲、三聚氰胺和尿素。集成的芳香苯基环heptazine g-C3N4改变其网络结构、光学和电子性质。聚合物g-C3N4融合的核心芳香苯组产生带隙调优,大大提高了分离和一生的电荷载体。使用光致还原作用的实验phenyl-grafted g-C3N4承担甲烷和甲酸高收益率。模型有机污染物罗丹明B染料可见光下迅速分解辐照。一个合适的芳香分子掺杂剂不足如苯脲可以大大改变photo-response的碳氮化光催化剂并可能提高其光催化活动。在可持续能源的重要价值生产和环境修复。

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