Graphene-MoS2 composite: Hydrothermal synthesis and catalytic property in hydrodesulfurization of dibenzothiophene

Mohammed Abdulmajeed Al-Daous

doi:10.1016/j.catcom.2015.09.030

Graphene-MoS₂ composite: Hydrothermal synthesis and catalytic property in hydrodesulfurization of dibenzothiophene

Mohammed Abdulmajeed Al-Daous^*

^*Corresponding author for this work

King Fahd University of Petroleum & Minerals

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

Graphene-MoS₂ composite synthesized by reacting graphene oxide (GO) with MoO₃ and NH₄SCN at pH < 1 produced a physical mixture of graphene and large MoS₂ particles. When GO was pre-treated with NaOH solution, smaller MoS₂ particles were directly grown on the graphene. The physicochemical properties of the composites were correlated with their catalytic performance in the HDS of DBT. The higher hydrogenating activity obtained over the composite with the larger MoS₂ particles was brought about by the formation of two "over-stoichiometric" sulfur: disulfide species S₂^2- bonded to the surface of MoS₂ particles and thiol groups attached to the graphene support.

Original language	English
Pages (from-to)	180-184
Number of pages	5
Journal	Catalysis Communications
Volume	72
DOIs	https://doi.org/10.1016/j.catcom.2015.09.030
State	Published - 5 Dec 2015

Bibliographical note

Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.

Keywords

Composite
Dibenzothiophene
Excess-sulfur
Graphene
Hydrodesulfurization
MoS

ASJC Scopus subject areas

Catalysis
General Chemistry
Process Chemistry and Technology

Access to Document

10.1016/j.catcom.2015.09.030

Cite this

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abstract = "Graphene-MoS2 composite synthesized by reacting graphene oxide (GO) with MoO3 and NH4SCN at pH < 1 produced a physical mixture of graphene and large MoS2 particles. When GO was pre-treated with NaOH solution, smaller MoS2 particles were directly grown on the graphene. The physicochemical properties of the composites were correlated with their catalytic performance in the HDS of DBT. The higher hydrogenating activity obtained over the composite with the larger MoS2 particles was brought about by the formation of two {"}over-stoichiometric{"} sulfur: disulfide species S22- bonded to the surface of MoS2 particles and thiol groups attached to the graphene support.",

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