Facile synthesis of 1T-WS2/graphite nanocomposite for efficient solar-driven oxygen evolution reaction

Abuzar Khan; Ibrahim Khan; Mohd Yusuf Khan; Hatim Dafallah; Ahsanulhaq Qurashi

doi:10.1016/j.ijhydene.2019.07.170

Facile synthesis of 1T-WS₂/graphite nanocomposite for efficient solar-driven oxygen evolution reaction

Abuzar Khan, Ibrahim Khan, Mohd Yusuf Khan, Hatim Dafallah, Ahsanulhaq Qurashi

Research output: Journal Publication › Article › peer-review

21 Citations (Scopus)

Abstract

In this work, crystalline two-dimensional (2D) tungsten disulfide nanodisc-like structures (1T-WS₂) and its nanocomposite with graphite sheets synthesized using a facile two-step solvothermal procedure for photoelectrochemical (PEC) oxygen evolution reaction (OER). The XRD patterns revealed the existence of WS₂ (1T phase) crystalline structure. Both WS₂ nanodiscs and graphite were ultrasonicated to exfoliate the sheets and the suspension was solvothermally treated to design a WS₂/graphite (WS₂/G) nanocomposite. Fascinating flower-like nanostructures composed of nanodiscs observed during the detailed morphological investigation. The FE-SEM observation demonstrated well-dispersed graphite sheets in WS₂ nanodiscs. The photoelectrochemical water splitting performance of bare WS₂ and WS₂/G hybrid photoanodes investigated under simulated 1 SUN irradiations revealed threefold increase in the photocurrent density of WS₂/G hybrid photoanode compared to WS₂.

Original language	English
Pages (from-to)	24045-24053
Number of pages	9
Journal	International Journal of Hydrogen Energy
Volume	45
Issue number	45
DOIs	https://doi.org/10.1016/j.ijhydene.2019.07.170
Publication status	Published - 14 Sept 2020
Externally published	Yes

Keywords

2D-tungsten disulfide
Graphite
Nanodisc
Photoelectrochemical
Solvothermal

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Fuel Technology
Condensed Matter Physics
Energy Engineering and Power Technology

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.ijhydene.2019.07.170

Cite this

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title = "Facile synthesis of 1T-WS2/graphite nanocomposite for efficient solar-driven oxygen evolution reaction",

abstract = "In this work, crystalline two-dimensional (2D) tungsten disulfide nanodisc-like structures (1T-WS2) and its nanocomposite with graphite sheets synthesized using a facile two-step solvothermal procedure for photoelectrochemical (PEC) oxygen evolution reaction (OER). The XRD patterns revealed the existence of WS2 (1T phase) crystalline structure. Both WS2 nanodiscs and graphite were ultrasonicated to exfoliate the sheets and the suspension was solvothermally treated to design a WS2/graphite (WS2/G) nanocomposite. Fascinating flower-like nanostructures composed of nanodiscs observed during the detailed morphological investigation. The FE-SEM observation demonstrated well-dispersed graphite sheets in WS2 nanodiscs. The photoelectrochemical water splitting performance of bare WS2 and WS2/G hybrid photoanodes investigated under simulated 1 SUN irradiations revealed threefold increase in the photocurrent density of WS2/G hybrid photoanode compared to WS2.",

keywords = "2D-tungsten disulfide, Graphite, Nanodisc, Photoelectrochemical, Solvothermal",

author = "Abuzar Khan and Ibrahim Khan and Khan, {Mohd Yusuf} and Hatim Dafallah and Ahsanulhaq Qurashi",

note = "Publisher Copyright: {\textcopyright} 2019",

year = "2020",

month = sep,

day = "14",

doi = "10.1016/j.ijhydene.2019.07.170",

language = "English",

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AU - Khan, Abuzar

AU - Khan, Ibrahim

AU - Khan, Mohd Yusuf

AU - Dafallah, Hatim

AU - Qurashi, Ahsanulhaq

PY - 2020/9/14

Y1 - 2020/9/14

N2 - In this work, crystalline two-dimensional (2D) tungsten disulfide nanodisc-like structures (1T-WS2) and its nanocomposite with graphite sheets synthesized using a facile two-step solvothermal procedure for photoelectrochemical (PEC) oxygen evolution reaction (OER). The XRD patterns revealed the existence of WS2 (1T phase) crystalline structure. Both WS2 nanodiscs and graphite were ultrasonicated to exfoliate the sheets and the suspension was solvothermally treated to design a WS2/graphite (WS2/G) nanocomposite. Fascinating flower-like nanostructures composed of nanodiscs observed during the detailed morphological investigation. The FE-SEM observation demonstrated well-dispersed graphite sheets in WS2 nanodiscs. The photoelectrochemical water splitting performance of bare WS2 and WS2/G hybrid photoanodes investigated under simulated 1 SUN irradiations revealed threefold increase in the photocurrent density of WS2/G hybrid photoanode compared to WS2.

AB - In this work, crystalline two-dimensional (2D) tungsten disulfide nanodisc-like structures (1T-WS2) and its nanocomposite with graphite sheets synthesized using a facile two-step solvothermal procedure for photoelectrochemical (PEC) oxygen evolution reaction (OER). The XRD patterns revealed the existence of WS2 (1T phase) crystalline structure. Both WS2 nanodiscs and graphite were ultrasonicated to exfoliate the sheets and the suspension was solvothermally treated to design a WS2/graphite (WS2/G) nanocomposite. Fascinating flower-like nanostructures composed of nanodiscs observed during the detailed morphological investigation. The FE-SEM observation demonstrated well-dispersed graphite sheets in WS2 nanodiscs. The photoelectrochemical water splitting performance of bare WS2 and WS2/G hybrid photoanodes investigated under simulated 1 SUN irradiations revealed threefold increase in the photocurrent density of WS2/G hybrid photoanode compared to WS2.

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