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

doi:10.11944/j.issn.1000-0518.2016.07.150356

摘要/Abstract

摘要：

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。

关键词: 氮化碳, 三聚氯氰, 活性红(RR), 可见光催化

Abstract:

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.

Key words: graphitic carbon nitride, cyanuric chloride, reactive red, visible light catalysis

张晓楠, 孙玉东, 李乃瑄. 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[J]. 应用化学, 2016, 33(7): 820-826.

ZHANG Xiaonan, SUN Yudong, LI Naixuan. Synthesis and Photocatalytic Activity of Graphitic Carbon Nitride/Cyanuric Chloride Composite Photocatalyst[J]. Chinese Journal of Applied Chemistry, 2016, 33(7): 820-826.

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