• 文献标题:   Electrostatic self-assembly for preparation of sulfonated graphene/gold nanoparticle hybrids and their application for hydrogen peroxide sensing
  • 文献类型:   Article
  • 作  者:   LI SJ, SHI YF, LIU L, SONG LX, PANG H, DU JM
  • 作者关键词:   sulfonated graphene, gold nanoparticle, hydrogen peroxide, electrocatalyst
  • 出版物名称:   ELECTROCHIMICA ACTA
  • ISSN:   0013-4686
  • 通讯作者地址:   Anyang Normal Univ
  • 被引频次:   61
  • DOI:   10.1016/j.electacta.2012.08.118
  • 出版年:   2012

▎ 摘  要

In this study, a new type of two-dimensional (2D) hybrid heterostructure was demonstrated by electrostatic assembling the anionic sulfonated graphene sheets (SGS) and positively charged gold nanoparticles (GNPs). In this strategy, water-dispersible sulfonated graphene dispersions were synthesized by covalently binding sulfonic acid groups in reduced grapheme oxide. Then, the negative charge of SGS was strong enough to drive the formation of the 20 nanomaterials with positively charged GNPs through electrostatic interaction. Furthermore, we utilized the as-prepared GNPs/SGS nanocomposites as the electrochemical enhanced material for H2O2 sensing (as the model analyte). The GNPs/SGS-modified glassy carbon electrode showed improved electrochemical catalytic ability toward electrochemical reaction of H2O2, and thus a rapid response, wide linear range and low detection limit were obtained using the chronoamperometry technique. This work might find promising applications in developing a new type of enzymeless biosensor. (C) 2012 Elsevier Ltd. All rights reserved.