• 文献标题:   Nanocomposites of AgInZnS and graphene nanosheets as efficient photocatalysts for hydrogen evolution
  • 文献类型:   Article
  • 作  者:   TANG XS, CHEN WW, ZU ZQ, ZANG ZG, DENG M, ZHU T, SUN KA, SUN LD, XUE JM
  • 作者关键词:  
  • 出版物名称:   NANOSCALE
  • ISSN:   2040-3364 EI 2040-3372
  • 通讯作者地址:   Chongqing Univ
  • 被引频次:   12
  • DOI:   10.1039/c5nr05145b
  • 出版年:   2015

▎ 摘  要

In this study, AgInZnS-reduced graphene (AIZS-rGO) nanocomposites with tunable band gap absorption and large specific surface area were synthesized by a simple hydrothermal route, which showed highly efficient photocatalytic hydrogen evolution under visible-light irradiation. The relationships between their crystal structures, morphology, surface chemical states and photocatalytic activity have been explored in detail. Importantly, the AIZS-rGO nanocomposites with 0.02 wt% of graphene exhibited the highest hydrogen production rate of 1.871 mmol h(-1) g(-1), which was nearly 2 times the hydrogen production rate when using pure AIZS nanoparticles as the photocatalyst. This high photocatalytic H-2-production activity was attributed predominantly to the incorporation of graphene sheets, which demonstrated an obvious influence on the structure and optical properties of the AIZS nanoparticles. In the AIZS-rGO nanocomposites, graphene could not only serve as an effective supporting layer but also is a recombination center for conduction band electrons and valence band holes. It is believed that this kind of graphene-based material would attract much attention as a promising photocatalyst with a high efficiency and a low cost for photocatalytic H-2 evolution and facilitates their application in the environmental protection field.