Recoverable and reusable visible-light photocatalytic performance of CVD grown atomically thin MoS2 films.
In: Chemosphere, Jg. 287 (2022-01-25), S. N.PAG
academicJournal
Zugriff:
The decomposition of water pollutants including industrial dyes and chemicals via photocatalytic decontamination is one of the major investigated problems in recent years. Two-dimensional molybdenum disulfide (MoS 2) layers have shown great promise as an efficient visible-light photocatalyst owing to its numerous active sites and large surface area. In this study, atomically thin MoS 2 films of different thicknesses from monolayer to five-layer and ten layers were fabricated on sapphire substrates using chemical vapor deposition (CVD). We demonstrate that these MoS 2 thin films can be used as a photocatalyst to degrade Methylene Blue (MB) dye and can be recovered completely with utmost structural and chemical stability. Under visible-light irradiation, the MB absorption peak completely disappears with ∼95.6% of degradation after 120 min. We also demonstrate the reusability of the MoS 2 thin films without significantly losing the photocatalytic activity even after 5-cycles of degradation studies. The chemical and structural stability of the MoS 2 films after 5-cycles of degradation studies were affirmed using various spectroscopic studies. Our findings suggest that the MB degradation efficiency increases from 19.01% to 98.46% with an increase in pH from 4 to 14. Our approach may facilitate a further design of other transition metal dichalcogenides-based recoverable photocatalysts for industrial applications. [Display omitted] • CVD grown atomically thin MoS 2 films show photocatalytic activity towards degradation of M Methylene Blue (MB) dye. • The MoS 2 films exhibited a degradation efficiency in the range 94.1–95.5%. • The photocatalytic MoS 2 films are easily recoverable and reusable. • The films exhibit high structural and chemical stability even after 5-cycles of the degradation studies. [ABSTRACT FROM AUTHOR]
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Recoverable and reusable visible-light photocatalytic performance of CVD grown atomically thin MoS2 films.
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Autor/in / Beteiligte Person: | Sindhu, Abhishek Singh ; Shinde, Nitin Babu ; Harish, S. ; Navaneethan, M. ; Eswaran, Senthil Kumar |
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Zeitschrift: | Chemosphere, Jg. 287 (2022-01-25), S. N.PAG |
Veröffentlichung: | 2022 |
Medientyp: | academicJournal |
ISSN: | 0045-6535 (print) |
DOI: | 10.1016/j.chemosphere.2021.132347 |
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