Journal
MATERIALS LETTERS
Volume 236, Issue -, Pages 690-693Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2018.11.047
Keywords
H-2 -generation; Zn0.5Cd0.5S; g-C3N4; Graphene; Semiconductors; Composite materials
Funding
- Youth Fund of Henan Normal University, China [2017QK14]
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In this work, a novel ternary composite photocatalytic material was constructed by in-situ deposition of 0D Zn0.5Cd0.5S nanoparticles onto the 2D g-C3N4 and reduced graphene oxide (RGO) surfaces via a simple one-pot hydrothermal reaction. Through optimizing of the g-C3N4 component proportion, Zn0.5Cd0.5S heterostructure decorated with 3 wt% g-C3N4 nanosheets (Zn0.5Cd0.5S/g-C3N4) displayed a high H-2-production rate of 4.956 mmol g(-1) h(-1), which was 2.73 times higher than that of pure Zn0.5Cd0.5S nanoparticles. Additionally, when 1 wt% RGO was further introduced to the binary Zn0.5Cd0.5S/g-C3N4 heterostructure, the obtained ternary Zn0.5Cd0.5S (0D)/g-C3N4 (2D)/RGO (2D) composite catalyst exhibited the highest photocatalytic H-2-production activity, whose H-2-production rate was 5.41 times higher than that of pure Zn0.5Cd0.5S nanoparticles. The excellent activity of the ternary Zn0.5Cd0.5S/g-C3N4/RGO catalyst is associated with the cooperative effects of Zn0.5Cd0.5S nanoparticles, RGO and g-C3N4 nanosheets, which not only extend the light absorption range and intensity, but also reduce the overpotential for H-2-production and dramatically improve the charge mobility and separation, thus boosting the H-2-evolution rate over the ternary composite photocatalyst. (C) 2018 Elsevier B.V. All rights reserved.
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