• 文献标题:   Highly Efficient Adsorption of Copper Ions by a PVP-Reduced Graphene Oxide Based On a New Adsorptions Mechanism
  • 文献类型:   Article
  • 作  者:   ZHANG YJ, CHI HJ, ZHANG WH, SUN YY, LIANG Q, GU Y, JING RY
  • 作者关键词:   polyvinylpyrrolidone, graphene oxide, cu ion, wastewater treatment, adsorption mechanism, density functional theory
  • 出版物名称:   NANOMICRO LETTERS
  • ISSN:   2311-6706 EI 2150-5551
  • 通讯作者地址:   North Univ China
  • 被引频次:   41
  • DOI:   10.1007/BF03353772
  • 出版年:   2014

▎ 摘  要

Polyvinylpyrrolidone-reduced gra, Atone oxide was prepared by modified hummers method and was used as adsorbent for removing Cu ions from wastewater. The effects of contact time and ions concentration on adsorption capacity were examined. The maximum adsorption capacity of 1689 ing/g was observed at an initial pH value of 3.5 after agitating for 10 min. It was demonstrated that polyvinylpyrrolidone-reduced graphene oxide had a huge adsorption capacity for Cu ions, which was 10 times higher than maximal value reported in previous works. The adsorption mechanism was also discussed by density functional theory. It demonstrates that Cu ions are attracted to surface of reduced graphene oxide by C atoms in reduced graphene oxide modified by polyvinylpyrrolidone through physisorption processes, which may be responsible for the higher adsorption capacity. Our results suggest that polyvinylpyrrolidone-reduced graphene oxide is an effective adsorbent for removing Cu ions in wastewater. It also provides a new way to improve the adsorption capacity of reduced graphene oxide for dealing with the heavy metal ion in wastewater.