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Highly Efficient Visible‐Light‐Driven Photocatalytic Hydrogen Production Using Robust Noble‐Metal‐Free Zn 0.5 Cd 0.5 S@Graphene Composites Decorated with MoS 2 Nanosheets
Author(s) -
Madhusudan Puttaswamy,
Shi Run,
Chandrashekar Bananakere Nanjegowda,
Xiang Shengling,
Smitha Ankanahalli Shankaregowda,
Wang Weijun,
Zhang Haichao,
Zhang Xian,
Amini Abbas,
Cheng Chun
Publication year - 2020
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.202000010
Subject(s) - materials science , graphene , photocatalysis , heterojunction , hydrogen production , noble metal , hydrothermal circulation , semiconductor , hydrogen , chemical engineering , charge carrier , visible spectrum , metal , sulfide , nanotechnology , optoelectronics , catalysis , metallurgy , chemistry , organic chemistry , engineering , biochemistry
Solar water splitting using semiconductor photocatalysts is considered to be one of the economical and significant techniques for hydrogen evolution. In this study, graphene–Zn x Cd 1− x S (ZCS) heterojunction is fabricated by hydrothermal method followed by simple photodeposition of ultrathin few layers of molybdenum sulfide (MoS 2 ) nanosheets. The results show that compared with pristine ZCS and 1 wt% graphene mixed ZCS photocatalysts, the 1 wt% graphene and 1 wt% MoS 2 photodeposited ZCS composited sample shows 39.5 mmol h −1 g −1 hydrogen production activity, which is 6.9 and 1.9 times significantly higher, respectively, with an apparent quantum yield of 53% at 420 nm visible light is recorded. The improved photocatalytic activity can be attributed to the formation of heterostructure interface between p‐type MoS 2 nanosheets with n‐type ZCS host, which allows for the faster transfer of the photogenerated electrons and thus significantly promotes the separation of photogenerated charge carriers.