skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Fabrication of highly efficient carbon coated exfoliated tungsten disulfide nanosheets core-shell nanostructure as a promising solar-light driven photocatalyst

Abstract

Highlights: • Investigated the benefits of exfoliation mechanism of WS{sub 2} nanosheets. • C@e-WS{sub 2} was successfully synthesized via two step exfoliation -hydrothermal process. • C@e-WS{sub 2} core-shell confirmed by HRTEM. • C@e-WS{sub 2} core-shell photocatalyst exhibited excellent photocatalytic activity. • Photodegradation mechanism of C@e-WS{sub 2} photocatalyst is elucidated and discussed. - Abstract: Exfoliated Tungsten disulfide (e-WS{sub 2}) nanosheets were obtained from bulk Tungsten disulfide (WS{sub 2}) in a liquid-phase ultrasonic exfoliation method using a DMF solvent. Core-shell mannered carbon coating was developed by hydrothermal process on exfoliated Tungsten disulfide (e-WS{sub 2}) to enhance the efficient charge separation, specific surface area with mesoporosity and stability for chemical processes and mechanical strains. The carbon coated e-WS{sub 2} nanosheets (C@e-WS{sub 2}) was performed by series of characterization techniques and explored to the photocatalytic degradation of malachite green (MG) dye by comparing with bulk WS{sub 2} and e-WS{sub 2}. Among all the photocatalysts highest performance was observed for the C@e-WS{sub 2}. C@e-WS{sub 2} catalyst displays more than 11 fold enhancements in the photocomposition rate of MG over bulk WS{sub 2} and nearly 8 fold improvements over e-WS{sub 2} for 90 min irradiation. In addition, for complete degradation of MG dye over the bulkmore » WS{sub 2}, e-WS{sub 2}, and C@e-WS{sub 2} catalysts were observed at 150, 130, and 90 min under simulated solar light irradiation. The results obtained using core-shell mannered C@e-WS{sub 2} are stepping stone for developing cost-effective and noble metal-free catalysts for photodegradation.« less

Authors:
 [1];  [2];  [3];  [1]
  1. School of Mechanical Engineering, Yeungnam University, Gyeongsan 712-749 (Korea, Republic of)
  2. Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, Uppal Road, Tarnaka, Hyderabad 500007 (India)
  3. Department of Chemical Engineering, Yeungnam University, 214-1, Dae-hakro 280, Gyeongsan, Gyeongbuk, 712-749 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22805302
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 107; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; CARBON; CATALYSTS; DIMETHYLFORMAMIDE; DYES; FABRICATION; IRRADIATION; NANOSTRUCTURES; PHOTOCATALYSIS; SHEETS; SPECIFIC SURFACE AREA; SURFACE COATING; TRANSMISSION ELECTRON MICROSCOPY; TUNGSTEN SULFIDES; ULTRASONIC WAVES; VISIBLE RADIATION

Citation Formats

Prabhakar Vattikuti, S. V., Shome, Sanchari, Koyyada, Ganesh, Shim, Jasool, and Jung, Jae Hak, E-mail: jhjung@ynu.ac.kr. Fabrication of highly efficient carbon coated exfoliated tungsten disulfide nanosheets core-shell nanostructure as a promising solar-light driven photocatalyst. United States: N. p., 2018. Web. doi:10.1016/J.MATERRESBULL.2018.07.032.
Prabhakar Vattikuti, S. V., Shome, Sanchari, Koyyada, Ganesh, Shim, Jasool, & Jung, Jae Hak, E-mail: jhjung@ynu.ac.kr. Fabrication of highly efficient carbon coated exfoliated tungsten disulfide nanosheets core-shell nanostructure as a promising solar-light driven photocatalyst. United States. https://doi.org/10.1016/J.MATERRESBULL.2018.07.032
Prabhakar Vattikuti, S. V., Shome, Sanchari, Koyyada, Ganesh, Shim, Jasool, and Jung, Jae Hak, E-mail: jhjung@ynu.ac.kr. Thu . "Fabrication of highly efficient carbon coated exfoliated tungsten disulfide nanosheets core-shell nanostructure as a promising solar-light driven photocatalyst". United States. https://doi.org/10.1016/J.MATERRESBULL.2018.07.032.
@article{osti_22805302,
title = {Fabrication of highly efficient carbon coated exfoliated tungsten disulfide nanosheets core-shell nanostructure as a promising solar-light driven photocatalyst},
author = {Prabhakar Vattikuti, S. V. and Shome, Sanchari and Koyyada, Ganesh and Shim, Jasool and Jung, Jae Hak, E-mail: jhjung@ynu.ac.kr},
abstractNote = {Highlights: • Investigated the benefits of exfoliation mechanism of WS{sub 2} nanosheets. • C@e-WS{sub 2} was successfully synthesized via two step exfoliation -hydrothermal process. • C@e-WS{sub 2} core-shell confirmed by HRTEM. • C@e-WS{sub 2} core-shell photocatalyst exhibited excellent photocatalytic activity. • Photodegradation mechanism of C@e-WS{sub 2} photocatalyst is elucidated and discussed. - Abstract: Exfoliated Tungsten disulfide (e-WS{sub 2}) nanosheets were obtained from bulk Tungsten disulfide (WS{sub 2}) in a liquid-phase ultrasonic exfoliation method using a DMF solvent. Core-shell mannered carbon coating was developed by hydrothermal process on exfoliated Tungsten disulfide (e-WS{sub 2}) to enhance the efficient charge separation, specific surface area with mesoporosity and stability for chemical processes and mechanical strains. The carbon coated e-WS{sub 2} nanosheets (C@e-WS{sub 2}) was performed by series of characterization techniques and explored to the photocatalytic degradation of malachite green (MG) dye by comparing with bulk WS{sub 2} and e-WS{sub 2}. Among all the photocatalysts highest performance was observed for the C@e-WS{sub 2}. C@e-WS{sub 2} catalyst displays more than 11 fold enhancements in the photocomposition rate of MG over bulk WS{sub 2} and nearly 8 fold improvements over e-WS{sub 2} for 90 min irradiation. In addition, for complete degradation of MG dye over the bulk WS{sub 2}, e-WS{sub 2}, and C@e-WS{sub 2} catalysts were observed at 150, 130, and 90 min under simulated solar light irradiation. The results obtained using core-shell mannered C@e-WS{sub 2} are stepping stone for developing cost-effective and noble metal-free catalysts for photodegradation.},
doi = {10.1016/J.MATERRESBULL.2018.07.032},
url = {https://www.osti.gov/biblio/22805302}, journal = {Materials Research Bulletin},
issn = {0025-5408},
number = ,
volume = 107,
place = {United States},
year = {2018},
month = {11}
}