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Journal of Materials Science
Erschienen in: Journal of Materials Science 10/2018

08.02.2018 | Energy materials

Facile one-pot liquid exfoliation preparation of molybdenum sulfide and graphene heterojunction for photoelectrochemical performance

verfasst von: Mengjiao Huang, Yixuan Zhou, Yaohui Guo, Huan Wang, Xuerong Hu, Xinlong Xu, Zhaoyu Ren

Erschienen in: Journal of Materials Science | Ausgabe 10/2018

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Abstract

A MoS2/graphene heterojunction has been prepared via a facile one-pot liquid exfoliation method and proved to have improved photoelectrochemical properties. With a suitable ultrasonic power, small MoS2 nanosheets with dozens of nanometer diameter can be obtained to adhere to graphene layers with tens of micrometer-scale diameter. Atomic force microscopy, transmission electron microscope, Raman spectra and adsorption spectra are used to characterize the structure of these MoS2/graphene heterojunction samples after exfoliation. The characterizations indicate that MoS2/graphene heterojunction in solution is stable and has good crystallinity. Moreover, photoelectrochemical measurements further prove that the obtained MoS2/graphene heterojunction exhibits improved photoresponse activity under the illumination of simulated sunlight compared to MoS2 and graphene. Combined with the first-principle calculation analysis, the improvement can be attributed to the extremely efficient charge separation of the heterojunction. The dynamic mechanism has been revealed through a MoS2/graphene band model, where graphene can serve as a collector for storing and transferring electrons, to promote the separation of photogenerated electron–hole pairs and suppress their recombination. This work verifies the superiority of MoS2/graphene heterojunction through its photoelectrochemical performance, which have referential significance for future MoS2/graphene optoelectronic devices.
Vorheriger Artikel A dyeing-induced heteroatom-co-doped route toward flexible carbon electrode derived from silk fabric
Nächster Artikel Metal–organic framework-driven copper/carbon polyhedron: synthesis, characterization and the role of copper in electrochemistry properties

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Metadaten
Titel
Facile one-pot liquid exfoliation preparation of molybdenum sulfide and graphene heterojunction for photoelectrochemical performance
verfasst von
Mengjiao Huang
Yixuan Zhou
Yaohui Guo
Huan Wang
Xuerong Hu
Xinlong Xu
Zhaoyu Ren
Publikationsdatum
08.02.2018
Verlag
Springer US
Erschienen in
Journal of Materials Science / Ausgabe 10/2018
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-018-2108-8

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