title: In situ synthesis of cobalt ferrites-embedded hollow N-doped carbon as an outstanding catalyst for elimination of organic pollutants.
abstract: Using polydopamine-metal ions complex as precursor, hollow mesoporous N-doped carbon microspheres encapsulating spinel ferrites nanocrystals (HM-NC/CoFe2O4) were facilely prepared with the aim of creating a novel heterogeneous catalyst for sulfate radical-based oxidation of organic contaminants. The surface morphology, structure and composition of HM-NC/CoFe2O4catalyst were thoroughly investigated. The applicability of the catalyst was systematically assessed through numerous controlled trials, several operating parameters, as well as different model pollutants by means of peroxymonosulfate (PMS) activation. Outstanding efficiency and excellent reusability were achieved due to the unique structure and composition of HM-NC/CoFe2O4. The HM-NC scaffold with high porosity and surface area not only stabilizes the CoFe2O4nanoparticles but also greatly facilitates the accessibility and adsorption of substrates to the active sites. In addition, both HM-NC and CoFe2O4on the material surface can act as active sites. Sulfate radicals and hydroxyl radicals are identified as main active species and a possible enhancement mechanism of catalytic performance is also proposed. Due to the simple synthesis method, low-cost precursors, unique structure and excellent catalytic activity and stability, this novel composite have great potential as new strategic materials for remediation of water pollution.
authors.affiliation: College of Environment, Zhejiang University of Technology, Hangzhou 310032, Zhejiang province, PR China.
authors.forename: Tao
authors.initials: T
authors.lastname: Zeng
authors.affiliation: College of Environment, Zhejiang University of Technology, Hangzhou 310032, Zhejiang province, PR China.
authors.forename: Mingdong
authors.initials: M
authors.lastname: Yu
authors.affiliation: College of Environment, Zhejiang University of Technology, Hangzhou 310032, Zhejiang province, PR China.
authors.forename: Haiyan
authors.initials: H
authors.lastname: Zhang
authors.affiliation: College of Environment, Zhejiang University of Technology, Hangzhou 310032, Zhejiang province, PR China.
authors.forename: Zhiqiao
authors.initials: Z
authors.lastname: He
authors.affiliation: College of Life Science, North China University of Science and Technology, Tangshan 063000, Hebei province, PR China.
authors.forename: Xiaole
authors.initials: X
authors.lastname: Zhang
authors.affiliation: College of Environment, Zhejiang University of Technology, Hangzhou 310032, Zhejiang province, PR China.
authors.forename: Jianmeng
authors.initials: J
authors.lastname: Chen
authors.affiliation: College of Environment, Zhejiang University of Technology, Hangzhou 310032, Zhejiang province, PR China. Electronic address: ss@zjut.edu.cn.
authors.forename: Shuang
authors.initials: S
authors.lastname: Song
keywords: Heterogeneous degradation; Hollow N-doped carbon; Organic contaminants; Peroxymonosulfate; Spinel ferrites nanocrystals