期刊
APPLIED SURFACE SCIENCE
卷 422, 期 -, 页码 607-615出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2017.06.036
关键词
N-doped graphene oxide; alpha-Fe2O3; Photo-Fenton; Glyphosate; Visible light
类别
资金
- National Natural Science Foundation of China [51302072]
- College of Arts and Sciences, University of Missouri - Kansas City
- University of Missouri Research Board
Though alpha-Fe2O3 has attracted much attention in photocatalytic or Fenton-catalytic degradation of organic contaminants, its performance is still unsatisfactory due to fast recombination of electrons and holes in photocatalytic process and the difficult conversion of Fe(II) and Fe(III) in Fenton reaction. Herein, a pyrrolic N-doped graphene oxide/Fe2O3 mesocrystal (NG-Fe2O3) nanocomposite with good distribution is synthesized by a simple solvothermal method and adjusting the oxygen-containing groups on graphene oxide. The morphology of NG-Fe2O3 contributes to a relatively large BET surface area and an intimate contact between NG and Fe2O3. These two important factors along with the excellent electro-conductivity of pyrrolic-N doped GO result in the efficient separation of electron-hole pairs and fast conversion of Fe(II) and Fe(III) in photo-Fenton synergistic reaction. Thus, a remarkably improved photo-Fenton catalytic activity of NG-Fe2O3 is obtained. The degrading rate on methyl blue increases by 1.5 times and the conversion rate of glyphosate increases by 2.3 times under visible light irradiation, compared to pristine alpha-Fe2O3 mesocrystals. (C) 2017 Elsevier B.V. All rights reserved.
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