Jump to main content
Jump to site search

Issue 16, 2017
Previous Article Next Article

MoS2 quantum dot-modified Ag/polyaniline composites with enhanced photogenerated carrier separation for highly efficient visible light photocatalytic H2 evolution performance

Author affiliations

Abstract

Designing photocatalysts with multiple active materials based on composites is essential for the creation of a photocatalytic hydrogen evolution reaction (HER) system. Here, we report the design and preparation of novel MoS2 quantum dot-modified Ag nanoparticle/polyaniline (MoS2 QDs–Ag/PANI) composites through a green liquid probe sonication route and hydrothermal synthesis for the first time. The composite photocatalysts exhibit significantly enhanced photocatalytic activity for H2 production from water splitting under visible light irradiation. The optimal photocatalytic activity of H2 evolution reaches 420.1 μmol over 4 wt% MoS2 QDs–Ag/PANI in the first 3 hours, which is 262.6 times higher than that of Ag/PANI composites and 4.0 times better than that of MoS2 QDs. The apparent quantum efficiency (AQE) is 30.5% at 430 nm. The composites have a large amount of reaction active sites and outstanding visible light utilization upon the introduction of MoS2 QDs. In addition, the synergistic effect of MoS2 QDs, PANI and Ag NPs promotes the spatial separation and transport efficiency of photogenerated charge carriers. These positive factors ultimately contribute to the superior photocatalytic activity for hydrogen production. Meanwhile, the photocatalyst exhibits high stability and reusability. This idea of composite design will be useful for the development of both hydrogen generation and multifunctional composite materials.

Graphical abstract: MoS2 quantum dot-modified Ag/polyaniline composites with enhanced photogenerated carrier separation for highly efficient visible light photocatalytic H2 evolution performance

Back to tab navigation

Publication details

The article was received on 28 May 2017, accepted on 23 Jun 2017 and first published on 23 Jun 2017


Article type: Paper
DOI: 10.1039/C7CY01073G
Citation: Catal. Sci. Technol., 2017,7, 3531-3538
  •   Request permissions

    MoS2 quantum dot-modified Ag/polyaniline composites with enhanced photogenerated carrier separation for highly efficient visible light photocatalytic H2 evolution performance

    X. Wang, S. Chen, M. Zhang, Y. Huang, S. Feng and D. Zhao, Catal. Sci. Technol., 2017, 7, 3531
    DOI: 10.1039/C7CY01073G

Search articles by author

Spotlight

Advertisements