Photo-functional materials with ordered structure by carbon nitride

以三聚氰酸等有机物为原料，在N2气氛下，以TiO 2为催化剂，于673 K热裂解3 h，制备了可见光响应型TiO 2光催化剂。结果发现，二氧化钛表面改性的碳和氮物种，如碳二亚胺，腈和cumberm/甜瓜结构（氮化碳聚合物：CNP）。将CN/TiO 2光催化剂用于可见光下甘油水溶液制氢。通过XPS、FT-IR、电化学测量和DFT计算对CN/TiO 2可见光响应的起源和反应机理进行了表征，证实了连接在TiO 2表面的高度分散的CNP在可见光响应的光催化反应中起着重要的电荷分离作用。

The visible-light responsive TiO2 photocatalyst was synthesized by the thermal-pyrolysis of organic compounds such as cyanuric acid with TiO2 under N2 atmosphere at 673 K for 3h. It was found that the TiO2 surface is modified with carbon and nitrogen species such as carbodiimide, nitrile and melem/melon structures (carbon nitride polymers: CNP). The CN/TiO2 photocatalyst was applied to hydrogen production from glycerine aqueous solutions under visible light irradiation. The origin of the visible-light response for the CN/TiO2 as well as the reaction mechanism was characterized by XPS, FT-IR, electrochemical measurements and DFT calculations, and it was confirmed that highly dispersed CNP linked to the TiO2 surface play a significant role in the effective charge separation for the visible-light responsive photocatalytic reactions.