石墨相氮化碳/三聚氯氰复合光催化剂的制备及其光催化活性

研制了一种石墨相氮化碳/三聚氯氰(g-C₃N₄/C₃Cl₃N₃)复合型光催化剂。 由于该催化剂在g-C₃N₄的基础上有效拓展了π共轭体系,同时引入氯原子,使带隙位置上移,改善了光生电荷的还原能力,在可见光照射下,能有效降解有机污染物。 实验结果表明,20 min内对RR染料废水的降解率达94.7%,重复使用5次后,降解率仍达94%。 通过在降解体系中加入氧化性活性物种捕获剂的方法,研究了g-C₃N₄/C₃Cl₃N₃吸收可见光降解有机污染物的机理。

Synthesis and Photocatalytic Activity of Graphitic Carbon Nitride/Cyanuric Chloride Composite Photocatalyst

A graphitic carbon nitride/cyanuric chloride(g-C₃N₄/C₃Cl₃N₃) composite photocatalyst was developed. The obtained catalyst effectively expands π-conjugated system of g-C₃N₄. Moreover, the band gap is significantly shifted, and the reduction ability of the photo generated charge is improved because of the introduction of a chlorine atom. The catalyst can effectively degrade organic pollutants under visible light. The result shows that the degradation ratio of reactive red-dye is 94.7% and is still kept at 94% after using 5 times. The mechanism on the degradation of organic pollutants under visible light was studied.