Polymer hydrogels with enhanced stability and heterogeneous Fenton activity in organic pollutant removal

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

	Polymer hydrogels with enhanced stability and heterogeneous Fenton activity in organic pollutant removal
	Zhuang, Yuan ; Shi, Baoyou
刊名	JOURNAL OF ENVIRONMENTAL SCIENCES
	2019-11-01
卷号	85 页码:147-155
关键词	Heterogeneous Fenton Tetracycline Polymer Stability
ISSN号	1001-0742
英文摘要	Polymer hydrogel-based materials have been shown to act as novel Fenton catalysts for water treatment, but the rational design of hydrogel-based catalysts with good stability has been a great challenge. To increase the stability and activity of polymer-based Fenton catalysts, uniform urchin-like alpha-Fe2O3 was grown in situ in a PVA carrier matrix here. PVA molecules promoted the growth of urchin-like alpha-Fe2O3, and then the PVA hydrogel acted as a barrier and carrier to reduce agglomeration. Through coordination by hydroxyl groups, PVA had good combination with Fe ions and alpha-Fe2O3. The formation of Fe-O-C bonds between iron oxides and polymers was reported for the first time, enhancing the material stability during catalysis. Under higher PVA concentrations, the resulting composite hydrogel could generate more (OH)-O-center dot due to the increase in the number of active sites because of the hairy urchin-like structure. In tetracycline degradation through a heterogeneous Fenton reaction, the resulting material had good catalytic activity from pH 2 to pH 10 with low iron leaching, good reusability and remained at a level of nearly 90% after five consecutive cycles. Density functional theory calculations were used to further prove the mechanism of structural change of the iron oxides. The HOMO and LUMO energies of the iron oxides changed from 5.428 and 4.899 eV to 5.926 and 5.310 eV, indicating that the presence of PVA could influence the charge of the iron atom. The results provide new insights into the preparation of polymer hydrogel-based heterogeneous Fenton catalysts with enhanced stability for water treatment. (c) 2019 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/43505]
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
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China
推荐引用方式 GB/T 7714	Zhuang, Yuan,Shi, Baoyou. Polymer hydrogels with enhanced stability and heterogeneous Fenton activity in organic pollutant removal[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2019,85:147-155.
APA	Zhuang, Yuan,&Shi, Baoyou.(2019).Polymer hydrogels with enhanced stability and heterogeneous Fenton activity in organic pollutant removal.JOURNAL OF ENVIRONMENTAL SCIENCES,85,147-155.
MLA	Zhuang, Yuan,et al."Polymer hydrogels with enhanced stability and heterogeneous Fenton activity in organic pollutant removal".JOURNAL OF ENVIRONMENTAL SCIENCES 85(2019):147-155.