• 文献标题:   Electrocatalytical oxidation of arsenite by reduced graphene oxide via in-situ electrocatalytic generation of H2O2
  • 文献类型:   Article
  • 作  者:   LI XH, LIU F, ZHANG WF, LU HB, ZHANG J
  • 作者关键词:   reduced graphene oxide, electrocatalysi, h2o2, oxidation, arsenite
  • 出版物名称:   ENVIRONMENTAL POLLUTION
  • ISSN:   0269-7491 EI 1873-6424
  • 通讯作者地址:   Chinese Acad Sci
  • 被引频次:   2
  • DOI:   10.1016/j.envpol.2019.112958
  • 出版年:   2019

▎ 摘  要

Preoxidation of As(III) to As(V) is required for the efficient removal of total arsenic in the treatment of wastewater. In this work, the electro-Fenton oxidation of As(III) with a high efficiency was successfully achieved by using the system of the stainless steel net (SSN) coating with reduced graphene oxide (RGO@SSN) as the cathode and stainless steel net (SSN) as the sacrificial anode. The RGO@SSN was synthesized by electrophoretic deposition-annealing method. The carbon disorder and defects of RGO resulted from the remained oxygen-containing functional groups facilitated the electrocatalytically active sites for two-electron oxygen reduction reaction (ORR). A high concentration (up to 1000 mu mol/L) of H2O2 was in-situ produced through two-electron oxygen reduction reaction of electro-catalysis, and then served as the electro-Fenton reagent for the oxidation of As(III). HO center dot generated by H2O2 participating the electro-Fenton reaction or decomposed at the surface of RGO@SSN cathode at acid condition endowed the strong oxidizing ability for As(III). The electro-Fenton equipped with RGO@SSN cathode has a promising application in the oxidation and removal of organic or inorganic pollutants in wastewater. (C) 2019 Elsevier Ltd. All rights reserved.