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Gram-Scale Aqueous Synthesis of Stable Few-Layered 1T-MoS2: Applications for Visible-Light-Driven Photocatalytic Hydrogen Evolution
Abstract
Most recently, much attention has been devoted to 1T phase MoS2 because of its distinctive phase-engineering nature and promising applications in catalysts, electronics, and energy storage devices. While alkali metal intercalation and exfoliation methods have been well developed to realize unstable 1T-MoS2 , but the aqueous synthesis for producing stable metallic phase remains big challenging. Herein, a new synthetic protocol is developed to mass-produce colloidal metallic 1T-MoS2 layers highly stabilized by intercalated ammonium ions (abbreviated as N-MoS2). In combination with density functional calculations, the X-ray diffraction pattern and Raman spectra elucidate the excellent stability of metallic phase. As clearly depicted by high-angle annular dark-field imaging in an aberration-corrected scanning transmission electron microscope and extended X-ray absorption fine structure, the N-MoS2 exhibits a distorted octahedral structure with a 2a0 × a0 basal plane superlattice and 2.72 Å Mo-Mo bond length. In a proof-of-concept demonstration for the obtained material's applications, highly efficient photocatalytic activity is achieved by simply hybridizing metallic N-MoS2 with semiconducting CdS nanorods due to the synergistic effect. As a direct outcome, this CdS:N-MoS2 hybrid shows giant enhancement of hydrogen evolution rate, which is almost 21-fold higher than pure CdS and threefold higher than corresponding annealed CdS:2H-MoS2.
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Metadata
- Authors
- Liu, Q., Li, X., He, Q., Khalil, A., Liu, D., Xiang, T., Wu, X., & Song, L.
- Venue
- Small
- Publisher
- Wiley
- Published
- 2015-08-31
- Volume
- 11
- Issue
- 41
- Pages
- 5556-5564
- ISSN
- 1613-6810 (ISSN-L)
- OpenAlex
- W2157294920
- Cited by
- 650
- References
- 10
- FWCI
- 17.72
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- doi.wiley.com/10.1002/tdm_license_1.1 (tdm, 1 d)
- Funders
- National Basic Research Program of China (2014CB848900, 2011CB921404)
- National Natural Science Foundation of China (U1232131, 11375198, 51172223, 21421063)
- Strategic Priority Research Program of CAS (XDB01020300)
- Fundamental Research Funds for the Central Universities (WK2310000035, WK2060190025, WK2060140014)
- USTCSCC, SCCAS, Tianjin, and Shanghai Supercomputer Centers
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- Liu, Q., Li, X., He, Q., Khalil, A., Liu, D., Xiang, T., Wu, X., & Song, L. (2015). Gram-Scale Aqueous Synthesis of Stable Few-Layered 1T-MoS2: Applications for Visible-Light-Driven Photocatalytic Hydrogen Evolution. Small. https://doi.org/10.1002/smll.201501822
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