Journal of Solid State Electrochemistry

, Volume 22, Issue 5, pp 1449–1458 | Cite as

A novel WO3/MoS2 photocatalyst applied to the decolorization of the textile dye Reactive Blue 198

  • Suellen Aparecida Alves
  • Lorena Athie Goulart
  • Lúcia Helena Mascaro
Original Paper
  • 153 Downloads

Abstract

A novel FTO/WO3 electrode decorated with MoS2 was constructed using two simple and low-cost techniques involving a modified single-step sol-gel method for the WO3 film together with the electrodeposition of amorphous MoS2. The photoelectrocatalytic performance of the material was investigated by monitoring the degradation of Reactive Blue 198 dye under visible-light irradiation. The FTO/WO3/MoS2 electrode exhibited excellent photocatalytic activity and afforded total decolorization of the dye after 90 min at low applied current density (5 mA cm−2). The results described herein support the view that MoS2 acts as a noble metal-free cocatalyst by promoting H2 evolution and assisting in the suppression of electron/hole pair recombination in the photocatalytic material (WO3), thereby improving the process of decolorization of the dye solution. The novel approach of combining of the WO3 and MoS2 materials shows particular promise and may prove to be very effective in the photocatalytic degradation of other hazardous organic compounds.

Keywords

Photocatalyst Cocatalysis Photoelectrochemical degradation WO3/MoS2 electrode Reactive Blue 198 

Notes

Acknowledgements

This work was supported by Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP; grant no. 2014/10757-4 and 2015/00231-8), Centro de Pesquisa, Inovação e Difusão/FAPESP (CEPID/FAPESP; grant no. 2013/07296-2), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior/Programa Professor Visitante do Exterior (CAPES/PVE).

Supplementary material

10008_2017_3771_MOESM1_ESM.docx (408 kb)
ESM 1 (DOCX 407 kb)

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Copyright information

© Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  1. 1.Universidade Federal de São CarlosSão CarlosBrazil

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