New paper published by Nishanth Thomas et al.
Nanotechnology and Bio-engineering Research Group,
Department of Environmental Science, IT Sligo
2D MoS2 structure, mechanisms, and photocatalytic applications
N. Thomas, S. Mathew, K.M. Nair, K. O'Dowd, P. Forouzandeh, A. Goswami, G. McGranaghan & S.C. Pillai
Semiconductor photocatalysis is widely applied for solving a number of environmental problems such as energy shortage and pollution.
TiO2 is reported as the most explored material for photocatalytic applications. Because the pristine TiO2 primarily absorbs the electromagnetic spectrum in the ultraviolet (UV) region, this hinders the broad applications of pristine TiO2 materials. Recent decades have witnessed a surge in the number of studies reported on photocatalytic applications of semiconductor materials such as g-C3N4, molybdenum disulfide (MoS2), and ZnO. Among them, MoS2 semiconductor material is of significant interest because of its excellent optical absorption property and fast charge carrier dynamics.
The crystal structure of bulk MoS2 consists of a vertical arrangement of MoS2 layers connected by weak van der Waals interactions. The bulk MoS2 material is reported to have an indirect bandgap of 1.2 eV, whereas two-dimensional (2D) single-layer MoS2 nanosheets have a direct bandgap of 1.8 eV. The absorption spectrum of 2D MoS2 falls in the visible region of the electromagnetic spectrum, and this opens up an ocean of opportunities for widespread applications. MoS2-based materials are reported to have applications in the area such as energy storage, hydrogen production, degradation of contaminants, disinfection etc.
Recently, many researchers have summarized the photocatalytic characteristics of MoS2 for various categories of applications. Yet, there are no recent reviews available in the literature that briefly summarize the recent advances in the photocatalytic strategies and applications of 2D MoS2-based materials.
In this review, the authors outline the state-of-the-art research directions in 2D MoS2 photocatalysis and the possible future trends that the researchers should adopt for the practical applications of MoS2 photocatalysis.
Two-dimensional (2D) molybdenum disulfide (MoS2) based materials are of great
interest because of their capacity to efficiently absorb electromagnetic spectrum in
the visible region. Starting from the structural and electronic properties, this review
discusses the synthesis strategies of 2D MoS2.
The major photocatalytic applications of 2D MoS2 such as hydrogen evolution,
pollutant degradation, self-cleaning, photoelectrochemical water splitting, and
microbial disinfection are summarized.
The mechanistic understanding of various photocatalytic applications of
2D MoS2 is summarized through schematic diagrams. In addition, this review
outlines the methodologies for improving the 2D MoS2 photocatalysts
and recapitulates the research directions in this area of semiconductor photocatalysis.
Nishanth Thomas contact -
Read the full article here: https://www.sciencedirect.com/science/article/pii/S2589234721000142
©2021 The Authors. Published by Elsevier Ltd. This is an open-access article under the CC BY license (