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Published in: Cellulose 1/2022

13-11-2021 | Original Research

Enhanced hydrogen evolution under visible light by a ternary composite photocatalyst made of CdS and MoS2 modified with bacterial cellulose aerogel

Authors: Lei Jiang, Mengying Xu, Shan Jiang, Pier-Luc Tremblay, Tian Zhang

Published in: Cellulose | Issue 1/2022

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Abstract

Heterostructure photocatalysts are developed for H2 production from visible light. Because of their excellent photocatalytic hydrogen evolution (PHE), PCs made of CdS and MoS2 have been studied extensively. Important characteristics of PCs to maximize PHE are efficient charge transfer and high surface area. Bacterial cellulose (BC), which is produced at a large scale from wastes of the food industry, is a promising eco-friendly candidate to improve the surface area of PCs. Here, intact BC aerogel combined with MoS2 was added to CdS to form a ternary PC. CdS/BC-MoS2, synthesized via a low-toxicity process, exhibited a surface area enhanced 1.5 times as well as improved photoinduced charge separation. Structural analyses demonstrated strong interactions between CdS, MoS2, and BC in the composite PC, which was also more proficient at absorbing visible light. The PHE rate of CdS/10%BC-MoS2 of 20.02 mmol g−1 h−1 was 17.7, 12.4, and 2.8 times faster than CdS, CdS with 10% BC, and CdS with 10% MoS2, respectively. CdS/10%BC-MoS2 exhibited an excellent quantum efficiency of 56.29%. Additionally, CdS/10%BC-MoS2 was highly stable under visible light. These results demonstrate that BC is a suitable material to improve the performance and increase the sustainability of CdS-based heterostructure PCs.

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Appendix
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Literature
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go back to reference Yan Z, Du L, Phillips DL (2017) Multilayer core–shell MoS2/CdS nanorods with very high photocatalytic activity for hydrogen production under visible-light excitation and investigation of the photocatalytic mechanism by femtosecond transient absorption spectroscopy. RSC Adv 7:55993–55999. https://doi.org/10.1039/C7RA12118KCrossRef Yan Z, Du L, Phillips DL (2017) Multilayer core–shell MoS2/CdS nanorods with very high photocatalytic activity for hydrogen production under visible-light excitation and investigation of the photocatalytic mechanism by femtosecond transient absorption spectroscopy. RSC Adv 7:55993–55999. https://​doi.​org/​10.​1039/​C7RA12118KCrossRef
Metadata
Title
Enhanced hydrogen evolution under visible light by a ternary composite photocatalyst made of CdS and MoS2 modified with bacterial cellulose aerogel
Authors
Lei Jiang
Mengying Xu
Shan Jiang
Pier-Luc Tremblay
Tian Zhang
Publication date
13-11-2021
Publisher
Springer Netherlands
Published in
Cellulose / Issue 1/2022
Print ISSN: 0969-0239
Electronic ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-021-04284-w

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