多金属氧酸盐调控的多孔氮化碳在可见光下的催化活性
Catalytic activity of porous carbon nitride regulated by polyoxometalates under visible light.
作者信息
Tang Shuge, Liu Zhuang, Ma Fengpan, Cao Guilong, Wang Jingkuan, Chen Wei, Feng Xiaojia, Zhu Yongfa
机构信息
Department of Science, Shenyang Agriculture University China
Department of Land Environment, Shenyang Agriculture University China.
出版信息
RSC Adv. 2020 Feb 27;10(14):8255-8260. doi: 10.1039/c9ra10441k. eCollection 2020 Feb 24.
A series of porous carbon nitrides modified by different polyoxometalates (POMs) were prepared by the ultrasonic method. POMs were assembled on the surface of mpg-CN electrostatic attraction. The catalyst has visible light degradation activity for phenol ( > 420 nm). mpg-CN modified by HSiWO with a mass ratio of 1 : 5 showed the highest catalytic activity, which was 3.5 times higher than that of mpg-CN. As an electron acceptor, polyoxometalate can capture the photoelectron of CN, which can promote the separation of photocharge and improve the photocatalytic activity. ESR also confirmed that the superoxide radicals play a major role in degradation. The results show that the charge separation efficiency and catalytic activity can be enhanced by polyacids.
通过超声法制备了一系列不同多金属氧酸盐（POMs）修饰的多孔碳氮化物。POMs通过静电吸引组装在介孔石墨相氮化碳（mpg-CN）表面。该催化剂对苯酚具有可见光降解活性（>420 nm）。质量比为1∶5的硅钨酸（HSiWO）修饰的mpg-CN表现出最高的催化活性，比mpg-CN高3.5倍。作为电子受体，多金属氧酸盐可以捕获氮化碳的光电子，促进光电荷的分离并提高光催化活性。电子自旋共振（ESR）也证实超氧自由基在降解中起主要作用。结果表明，多元酸可以提高电荷分离效率和催化活性。
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