Jump to main content
Jump to site search


Stable 1T-phase MoS2 as an effective electron mediator promoting photocatalytic hydrogen production

Abstract

Coupling two semiconductors together to construct a Z-scheme type photocatalytic system is an efficient strategy to solve the serious recombination challenge of photogenerated electrons and holes. In this work, we develop a novel composite photocatalyst by sandwiching metallic 1T-phase MoS2 nanosheets between MoO3 and g-C3N4 (MoO3/1T-MoS2/g-C3N4) for the first time. The metallic 1T-phase MoS2 acts as an efficient electron mediator between MoO3 and g-C3N4 to construct an all-solid-state Z-scheme photocatalytic system, resulting in a highly-efficient spatial charge separation and transfer process. Benefited from this, the newly developed MoO3/1T-MoS2/g-C3N4 exhibits a drastically enhanced photocatalytic H2 evolution rate of 513.0 μmol h−1 g−1 under visible light irradiation (> 420 nm), which is nearly 12 times higher than that of the pure g-C3N4 (39.5 μmol h−1 g−1), and 3.5 times higher than that of the MoO3/g-C3N4 (145.7 μmol h-1 g-1). More importantly, the originally unstable 1T-phase MoS2 becomes very stable in MoO3/1T-MoS2/g-C3N4 because of the sandwich structure where 1T-phase MoS2 is protected by MoO3 and g-C3N4, which endows the photocatalyst with excellent photostability. It is believed that this study will provide new insights into the design of efficient and stable Z-scheme heterostructures for photocatalytic applications.

Back to tab navigation

Supplementary files

Publication details

The article was received on 02 Jan 2018, accepted on 12 Apr 2018 and first published on 12 Apr 2018


Article type: Paper
DOI: 10.1039/C8NR00017D
Citation: Nanoscale, 2018, Accepted Manuscript
  •   Request permissions

    Stable 1T-phase MoS2 as an effective electron mediator promoting photocatalytic hydrogen production

    J. Shi, Y. Zou, D. Ma, Z. Fan, L. Cheng, D. Sun, Z. Wang, C. Niu and L. Wang, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR00017D

Search articles by author

Spotlight

Advertisements