1. Construction of 2D/1D Cu7S4 nanosheets/Mn0.3Cd0.7S nanorods heterojunction for highly efficient photocatalytic hydrogen evolution.
- Author
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Lv, Hua, Zhang, Fubiao, Wang, Lanlan, Shen, Qinhui, Li, Guanyong, Zhan, Mingyan, Wang, Gongke, Wang, Guangtao, and Liu, Yumin
- Subjects
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HYDROGEN evolution reactions , *HETEROJUNCTIONS , *NANORODS , *COPPER , *INTERSTITIAL hydrogen generation , *SURFACE reactions , *SOLAR energy - Abstract
[Display omitted] Developing cost-effective cocatalyst-modified photocatalytic systems with boosted carrier separation and rapid surface catalytic reaction is an ideal strategy for effectively converting solar energy into desired fuels. Herein, a series of Cu 7 S 4 /Mn 0.3 Cd 0.7 S hierarchical heterostructures are designed and fabricated to achieve efficient and robust photocatalytic H 2 evolution by coupling one-dimensional (1D) Mn 0.3 Cd 0.7 S nanorods with two-dimensional (2D) Cu 7 S 4 nanosheets through a facile sonochemical strategy. Benefiting from dimensionality and cocatalyst effects, the constructed 2D/1D Cu 7 S 4 /Mn 0.3 Cd 0.7 S heterojunction photocatalyst containing 1.5 wt% Cu 7 S 4 displays excellent photostability and superior photocatalytic H 2 evolution rate up to 914.3 μmol h−1, which is 4.43 and 2.22-folds increment relative to bare Mn 0.3 Cd 0.7 S and the 3 wt% Pt/Mn 0.3 Cd 0.7 S, respectively. The various characterization results reveal that the utilization of semimetallic Cu 7 S 4 nanosheets as the cocatalyst to form a Schottky heterojunction can promote the light-harvesting capability, suppress charge carrier recombination, and provide sufficient reaction sites for hydrogen generation, thereby resulting in the dramatically improved photocatalytic performance. This work clarifies the role of Cu 7 S 4 nanosheets as the robust and cost-effective cocatalyst in the photocatalytic reaction and opens a new horizon for designing other Cu 7 S 4 -based cocatalyst/semiconductor Schottky heterostructures for efficient solar-to-fuel conversion. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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