• 文献标题:   Construction of H2O2-responsive asymmetric 2D nanofluidic channels with graphene and peroxidase-mimetic V2O5 nanowires
  • 文献类型:   Article
  • 作  者:   ZHANG L, TIAN QQ, LIN L, LI JH
  • 作者关键词:   2d nanochannel, graphene, v2o5 nanowire, porous membrane, h2o2responsive
  • 出版物名称:   ANALYTICAL BIOANALYTICAL CHEMISTRY
  • ISSN:   1618-2642 EI 1618-2650
  • 通讯作者地址:   Tsinghua Univ
  • 被引频次:   2
  • DOI:   10.1007/s00216-018-1494-8
  • 出版年:   2019

▎ 摘  要

The flexible two-dimensional (2D) nanosheet structure, high specific surface, and unique electrical properties make graphene an emerging nano-building block for molecule-responsive nanochannels. Herein, we report a novel graphene and V2O5 nanowire-based porous asymmetric membrane, which shows excellent catalytic performance and sensitive and quick response for H2O2. Poly(diallyldimethylammonium chloride)-functionalized graphene nanosheets were made into restacked lamellar film with porous structure and high anion selectivity. V2O5 nanowire, a kind of enzyme-mimetic nanomaterial, was mounted on one side of the graphene membrane through a sequential vacuum filtration method. The V2O5 nanowires on the membrane have high catalytic activities for H2O2 reduction, with the Michealis-Menten constant (K (M)) of 1.74 mM, better than various reported peroxidase-based nanocomposites and peroxidase mimics. This composite membrane showed quick response to H2O2 within 5 s, with good reproducibility and high operational stability. The responsive linear range was from 10 mu M to 1 mM, with the detection limit of 9.5 mu M. This fabrication of 2D layered nanomaterials and enzyme mimics could be extended for developing novel smart molecule-responsive devices.