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Peroxymonosulfate-enhanced visible light photocatalytic degradation of bisphenol A by perylene imide-modified g-C3N4
Zhang, Juanjuan; Zhao, Xu; Wang, Yanbin; Gong, Yan; Cao, Di; Qiao, Meng
2018-12-05
Source PublicationAPPLIED CATALYSIS B-ENVIRONMENTAL
ISSN0926-3373
Volume237Pages:976-985
AbstractIn 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.
Department中国科学院饮用水科学与技术重点实验室
Keywordg-C3N4 Photocatalysis Peroxymonosulfate Bisphenol A
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/41400
Collection中国科学院饮用水科学与技术重点实验室
Recommended Citation
GB/T 7714
Zhang, Juanjuan,Zhao, Xu,Wang, Yanbin,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 Zhang, Juanjuan,Zhao, Xu,Wang, Yanbin,Gong, Yan,Cao, Di,&Qiao, Meng.(2018).Peroxymonosulfate-enhanced visible light photocatalytic degradation of bisphenol A by perylene imide-modified g-C3N4.APPLIED CATALYSIS B-ENVIRONMENTAL,237,976-985.
MLA Zhang, Juanjuan,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.
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