• 文献标题:   Thiol-functionalized magnetite/graphene oxide hybrid as a reusable adsorbent for Hg2+ removal
  • 文献类型:   Article
  • 作  者:   BAO J, FU Y, BAO ZH
  • 作者关键词:   mercury ion, magnetite, adsorption capacity, graphene oxide, hybrid
  • 出版物名称:   NANOSCALE RESEARCH LETTERS
  • ISSN:   1931-7573 EI 1556-276X
  • 通讯作者地址:   Jiangsu Prov Acad Environm Sci
  • 被引频次:   48
  • DOI:   10.1186/1556-276X-8-486
  • 出版年:   2013

▎ 摘  要

A thiol-functionalized magnetite/graphene oxide (MGO) hybrid as an adsorbent of Hg2+ was successfully synthesized by a two-step reaction. It exhibited a higher adsorption capacity compared to the bare graphene oxide and MGO due to the combined adsorption of thiol groups and magnetite nanocrystals. Its capacity reached 289.9 mg g(-1) in a solution with an initial Hg2+ concentration of 100 mg l(-1). After being exchanged with H+, the adsorbent could be reused. The adsorption of Hg2+ by the thiol-functionalized MGO fits well with the Freundlich isotherm model and followed pseudo-second-order kinetics.