l-Ascorbic acid oxygen-induced micro-electronic fields over metal-free polyimide for peroxymonosulfate activation to realize efficient multi-pathway destruction of contaminants

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

	l-Ascorbic acid oxygen-induced micro-electronic fields over metal-free polyimide for peroxymonosulfate activation to realize efficient multi-pathway destruction of contaminants
	Cao, Wenrui; Lyu, Lai; Deng, Kanglan; Lu, Chao; Hu, Chun
刊名	JOURNAL OF MATERIALS CHEMISTRY A
	2020-01-14
卷号	8 期号:2 页码:810-819
ISSN号	2050-7488
英文摘要	Peroxymonosulfate (PMS) activation in heterogeneous processes for pollutant removal is a promising water treatment technique. However, the existing rate limiting step of the metal-containing system greatly restrains its performance and increases the consumption of PMS and energy. Herein, we describe an efficient, metal-free strategy for solving these problems. In this study, l-ascorbic acid O-doped carbon-nitrogen-oxygen polymer nano-flowers (O-Vc-CNOP Nfs) were fabricated via a facile thermal polymerization process. The metal-free O-Vc-CNOP Nfs showed excellent activity and stability in PMS activation for the degradation of various organic pollutants. Even the refractory endocrine interferon bisphenol A can be completely removed in just 1 min. Doping with O induced bidirectional transfer of electrons on aromatic rings through C-O-C bonding [C(pi)-> O <- C(pi)], which led to the formation of micro-electronic fields on the catalyst surface. During the reaction, efficient oxidation of organic pollutants by utilizing the charges of pollutants themselves around the electron-poor C(pi) areas inhibited undesirable oxidation of PMS and promoted PMS reduction in the electron-rich O areas to generate hydroxyl (OH) and sulfate (SO4-) radicals. The reduction of dissolved oxygen to O-2(-) around the electron-rich O areas also destroyed the pollutants, and this further drove electron donation from the pollutants and accelerated catalytic oxidation. These multi-pathway synergistic processes involving oxidation of the pollutants themselves and attack by free radicals enabled rapid degradation of contaminants.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/45321]
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	Cao, Wenrui,Lyu, Lai,Deng, Kanglan,et al. l-Ascorbic acid oxygen-induced micro-electronic fields over metal-free polyimide for peroxymonosulfate activation to realize efficient multi-pathway destruction of contaminants[J]. JOURNAL OF MATERIALS CHEMISTRY A,2020,8(2):810-819.
APA	Cao, Wenrui,Lyu, Lai,Deng, Kanglan,Lu, Chao,&Hu, Chun.(2020).l-Ascorbic acid oxygen-induced micro-electronic fields over metal-free polyimide for peroxymonosulfate activation to realize efficient multi-pathway destruction of contaminants.JOURNAL OF MATERIALS CHEMISTRY A,8(2),810-819.
MLA	Cao, Wenrui,et al."l-Ascorbic acid oxygen-induced micro-electronic fields over metal-free polyimide for peroxymonosulfate activation to realize efficient multi-pathway destruction of contaminants".JOURNAL OF MATERIALS CHEMISTRY A 8.2(2020):810-819.