Peroxymonosulfate-enhanced visible light photocatalytic degradation of bisphenol A by perylene imide-modified g-C3N4

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 中国科学院饮用水科学与技术重点实验室

	Peroxymonosulfate-enhanced visible light photocatalytic degradation of bisphenol A by perylene imide-modified g-C3N4
	Qiao, Meng; Cao, Di; Gong, Yan; Wang, Yanbin; Zhao, Xu; Zhang, Juanjuan
刊名	APPLIED CATALYSIS B-ENVIRONMENTAL
	2018-12-05
卷号	237 页码:976-985
关键词	g-C3N4 Photocatalysis Peroxymonosulfate Bisphenol A
ISSN号	0926-3373
文献子类	Article
英文摘要	In this study, a metal-free photocatalyst (PI-g-C3N4) was synthesized through an amidation reaction between perylene tetracarboxylic dianhydride (PTCDA) and graphitic carbon nitride (g-C3N4). In order to enhance the photocatalytic degradation efficiency of bisphenol A (BPA) by 5 wt% PI-g-C3N4, peroxymonosulfate (PMS) was introduced into this system. When 5 mM PMS was added, 96% of SPA with an initial concentration of 10 mg/L was degraded within 60 min; the pseudo-first-order degradation kinetics constant of BPA was increased from 0.0057 to 0.0501 min(-1) Based on the photoelectrochemical analysis, it was proposed that PI-g-C3N4 achieved a more effective separation of photogenerated electron-hole pairs and displayed higher conductivity than PTCDA and g-C3N4 individually, thus promoting the PMS activation into active radicals by the photogenerated electrons. The BPA degradation was favored at high PMS concentrations under alkaline conditions. The slight inhibition effect of co-existing anions on the degradation of SPA followed the order: H2PO4- > NO3- approximate to HCO3-; Cl- had a remarkable positive effect on the degradation of BPA. The radical quenching tests and electron spin resonance results indicated that O-2 center dot(-) O-1(2), and h(+) were the major species for the degradation of BPA. Combined with intermediates analysis, the degradation mechanism and pathway of SPA was proposed. The high stability of the 5 wt% PI-g-C3N4 was finally demonstrated.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/41400]
专题	生态环境研究中心_中国科学院饮用水科学与技术重点实验室
推荐引用方式 GB/T 7714	Qiao, Meng,Cao, Di,Gong, Yan,et al. Peroxymonosulfate-enhanced visible light photocatalytic degradation of bisphenol A by perylene imide-modified g-C3N4[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2018,237:976-985.
APA	Qiao, Meng,Cao, Di,Gong, Yan,Wang, Yanbin,Zhao, Xu,&Zhang, Juanjuan.(2018).Peroxymonosulfate-enhanced visible light photocatalytic degradation of bisphenol A by perylene imide-modified g-C3N4.APPLIED CATALYSIS B-ENVIRONMENTAL,237,976-985.
MLA	Qiao, Meng,et al."Peroxymonosulfate-enhanced visible light photocatalytic degradation of bisphenol A by perylene imide-modified g-C3N4".APPLIED CATALYSIS B-ENVIRONMENTAL 237(2018):976-985.