One‐pot Synthesis of CdS Nanocrystals Hybridized with Single‐Layer Transition‐Metal Dichalcogenide Nanosheets for Efficient Photocatalytic Hydrogen Evolution
Abstract
Exploration of low‐cost and earth‐abundant photocatalysts for highly efficient solar photocatalytic water splitting is of great importance. Although transition‐metal dichalcogenides (TMDs) showed outstanding performance as co‐catalysts for the hydrogen evolution reaction (HER), designing TMD‐hybridized photocatalysts with abundant active sites for the HER still remains challenge. Here, a facile one‐pot wet‐chemical method is developed to prepare M S 2–CdS (M=W or Mo) nanohybrids. Surprisedly, in the obtained nanohybrids, single‐layer M S 2 nanosheets with lateral size of 4–10 nm selectively grow on the Cd‐rich (0001) surface of wurtzite CdS nanocrystals. These M S 2–CdS nanohybrids possess a large number of edge sites in the M S 2 layers, which are active sites for the HER. The photocatalytic performances of WS 2–CdS and MoS 2–CdS nanohybrids towards the HER under visible light irradiation (>420 nm) are about 16 and 12 times that of pure CdS, respectively. Importantly, the M S 2–CdS nanohybrids showed enhanced stability after a long‐time test (16 h), and 70 % of catalytic activity still remained.
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Loading TMDs as co-catalysts to form semiconductor-semiconductor junctions and create more interfaces can greatly enhance charge separation and transport in semiconductor photocatalysts.
“In photocatalytic HERs, charge separation and transport in semiconductor photocatalysts can be greatly enhanced through loading TMDs as co-catalysts to form semiconductor-semiconductor junctions and create more interfaces. [ 36-38 ]”
From 2D Transition‐Metal‐Dichalcogenide‐Nanosheet‐Based Composites for Photocatalytic and Electrocatalytic Hydrogen Evolution Reactions (2016) · cites this paper as [36]
The extremely small size of the MS2/CdS nanohybrids (4-10 nm) shortened the diffusion pathway of the charge carriers and thus decreased the probability of charge-carrier recombination, which further improved the photocatalytic activity.
“Additionally, the extremely small size of the MS 2 /CdS nanohybrids (4-10 nm) shortened the diffusion pathway of the charge carriers and thus decreased the probability of chargecarrier recombination, which further improved the photocatalytic activity. [ 36 ]”
From 2D Transition‐Metal‐Dichalcogenide‐Nanosheet‐Based Composites for Photocatalytic and Electrocatalytic Hydrogen Evolution Reactions (2016) · cites this paper as [36]
Single-layer MS2 nanosheets with a lateral size of 4-10 nm selectively grew on the Cd-rich (0001) surface of wurtzite CdS nanocrystals.
“From the TEM images, single-layer MS 2 nanosheets with a lateral size of 4-10 nm selectively grew on the Cd-rich (0001) surface of wurtzite CdS nanocrystals.”
From 2D Transition‐Metal‐Dichalcogenide‐Nanosheet‐Based Composites for Photocatalytic and Electrocatalytic Hydrogen Evolution Reactions (2016) · cites this paper as [36]
WS2/CdS (1984 μmol h−1 g−1) and MoS2/CdS (1472 μmol h−1 g−1) nanohybrids exhibited excellent catalytic performance under visible-light irradiation (>420 nm), which are about 16 times and 12 times higher than pure CdS nanocrystals (119 μmol h−1 g−1), respectively.
“From the photocatalytic hydrogen evolution results, WS 2 /CdS (1984 µmol h -1 g -1 ) and MoS 2 /CdS (1472 µmol h -1 g -1 ) nanohybrids exhibited excellent catalytic performance under visible-light irradiation ( > 420 nm), which are about 16 times and 12 times higher than the pure CdS nanocrystals (119 µmol h -1 g -1 ), respectively.”
From 2D Transition‐Metal‐Dichalcogenide‐Nanosheet‐Based Composites for Photocatalytic and Electrocatalytic Hydrogen Evolution Reactions (2016) · cites this paper as [36]
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Lu, Q., Yu, Y., Ma, Q., Chen, B., & Zhang, H. (2016) · Advanced Materials · doi:10.1002/adma.201503270 · Cited by 1,447 · see citing works
Self-citation
- Authors
- Chen, J., Wu, X., Yin, L., Li, B., Hong, X., Fan, Z., Chen, B., Xue, C., & Zhang, H.
- Affiliations
- Nanyang Technological University (SG)
- Agency for Science, Technology and Research (SG)
- Corresponding author
- Zhang, Hua
- Venue
- Angewandte Chemie
- Publisher
- Wiley
- Published
- 2014-12-03
- Volume
- 127
- Issue
- 4
- Pages
- 1226-1230
- ISSN
- 0044-8249 (ISSN-L)
- 1521-3757
- OpenAlex
- W4242030100
- Cited by
- 176
- References
- 5
- Citations by year
- 2026: 9 · 2025: 6 · 2024: 6 · 2023: 11 · 2022: 9 · 2021: 13 · 2020: 11 · 2019: 30 · 2018: 23 · 2017: 19 · 2016: 23 · 2015: 16
- FWCI
- 6.37
- Type
- journal article
- Language
- de
- Open access
- closed
- Locations
- Angewandte Chemie (publishedVersion)
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Advanced Photocatalysis Techniques
- Physical Sciences › Materials Science › Materials Chemistry › 2D Materials and Applications
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › TiO2 Photocatalysis and Solar Cells
- Keywords
- CdS nanocrystals, photocatalytic hydrogen evolution, photocatalytic water splitting, one-pot synthesis, edge sites, visible light photocatalysis, catalyst stability
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