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Frontiers in Energy

Front. Energy    2019, Vol. 13 Issue (2) : 251-268
Recent progress in MoS2 for solar energy conversion applications
Soheil RASHIDI, Akshay CARINGULA, Andy NGUYEN, Ijeoma OBI, Chioma OBI, Wei WEI()
Department of Mechanical Engineering, Wichita State University, Wichita KS 67260, USA
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In an era of graphene-based nanomaterials as the most widely studied two-dimensional (2D) materials for enhanced performance of devices and systems in solar energy conversion applications, molybdenum disulfide (MoS2) stands out as a promising alternative 2D material with excellent properties. This review first examined various methods for MoS2 synthesis. It, then, summarized the unique structure and properties of MoS2 nanosheets. Finally, it presented the latest advances in the use of MoS2 nanosheets for important solar energy applications, including solar thermal water purification, photocatalytic process, and photoelectrocatalytic process.

Keywords 2D nanomaterial      molybdenum disulfide      solar energy conversion      solar thermal conversion      photocatalytst      photoelectrocatalyst     
Corresponding Authors: Wei WEI   
Online First Date: 16 May 2019    Issue Date: 04 July 2019
 Cite this article:   
Soheil RASHIDI,Akshay CARINGULA,Andy NGUYEN, et al. Recent progress in MoS2 for solar energy conversion applications[J]. Front. Energy, 2019, 13(2): 251-268.
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Ijeoma OBI
Chioma OBI
Fig.1  Metal coordinate, top view, and stacking sequence of TMD structure (Reproduced from Ref. [28] with permission from the Royal Society of Chemistry)
Fig.2  Schematic of functionalization scheme
Fig.3  Charaterization of MoSe2 and MoS2
Fig.4  Mechanisms of band gap engineering in semiconductor nanocrystals through size, shape, composition, impurity doping, heterostructure band offset, and lattice strain (Reproduced from Ref. [71] with permission from American Chemical Society)
Fig.5  (a) UV-vis absorption spectra of as-prepared BiVO4, MoS2 and BiVO4@MoS2; (b–f) the plot of (ahn)2 vs. energy hv and band gap energy of the as-prepared samples (Reproduced from Ref. [80] with permission from Elsevier)
Fig.6  p-n heterojunction photocatalyst formation model and the mechanism of photocatalysis of p-n heterojunction photocatalyst (Reproduced from Ref. [80] with permission from Elsevier)
Fig.7  Band structures and LDOS
Fig.8  Characterization of MoS2
Fig.9  Basic edge dislocations formed by removal of shaded atoms
Fig.10  Performance evaluation of catalysts
Fig.11  Band gap position and redox levels for the HER for (a) MoS2 at the flat band potential; (b) MoS2 at large negative bias; (c) Si at flat band potential; and (d) Si at negative bias (From the figure it is seen that the HER does not occur spontaneously on bulk MoS2, but requires additional quantum confinement, or high p-type donor concentrations. In (b) the MoS2 is biased enough that the HER occurs, the exact potential cannot be defined. On Si the HER occur readily even at slightly positive bias vs. RHE, until the flat band potential (c) at more negative potentials the HER occurs even faster (d) (Reproduced from Ref. [121] with permission from Royal Society of Chemical)
Fig.12  Schematic illustration of the charge transfer in TiO2/MG composites (The proposed mechanism for the enhanced electron transfer in the TiO2/MG system under irradiation assumes that the photo excited electrons are transferred from the CB of TiO2 not only to the MoS2 nanosheets but also to the C atoms in the graphene sheets, which can effectively reduce H+ to produce H2 (Reproduced from Ref. [131] with permission from American Chemical Society)
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