Materials (Jul 2019)

High-throughput Production of ZnO-MoS<sub>2</sub>-Graphene Heterostructures for Highly Efficient Photocatalytic Hydrogen Evolution

  • Haocong Dong,
  • Junzhu Li,
  • Mingguang Chen,
  • Hongwei Wang,
  • Xiaochuan Jiang,
  • Yongguang Xiao,
  • Bo Tian,
  • Xixiang Zhang

Journal volume & issue
Vol. 12, no. 14
p. 2233


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High-throughput production of highly efficient photocatalysts for hydrogen evolution remains a considerable challenge for materials scientists. Here, we produced extremely uniform high-quality graphene and molybdenum disulfide (MoS2) nanoplatelets through the electrochemical-assisted liquid-phase exfoliation, out of which we subsequently fabricated MoS2/graphene van der Waals heterostructures. Ultimately, zinc oxide (ZnO) nanoparticles were deposited into these two-dimensional heterostructures to produce an artificial ZnO/MoS2/graphene nanocomposite. This new composite experimentally exhibited an excellent photocatalytic efficiency in hydrogen evolution under the sunlight illumination ( λ > 400   n m ), owing to the extremely high electron mobilities in graphene nanoplatelets and the significant visible-light absorptions of MoS2. Moreover, due to the synergistic effects in MoS2 and graphene, the lifetime of excited carriers increased dramatically, which considerably improved the photocatalytic efficiency of the ZnO/MoS2/graphene heterostructure. We conclude that the novel artificial heterostructure presented here shows great potential for the high-efficient photocatalytic hydrogen generation and the high throughput production of visible-light photocatalysts for industrial applications.