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Article Dans Une Revue Beilstein Journal of Nanotechnology Année : 2024

Intermixing of MoS 2 and WS 2 photocatalysts toward methylene blue photodegradation

Résumé

Visible-light-driven photocatalysis using layered materials has garnered increasing attention regarding the degradation of organic dyes. Herein, transition-metal dichalcogenides MoS 2 and WS 2 prepared by chemical vapor deposition as well as their intermixing are evaluated for photodegradation (PD) of methylene blue under solar simulator irradiation. Our findings revealed that WS 2 exhibited the highest PD efficiency of 67.6% and achieved an impressive PD rate constant of 6.1 × 10 −3 min −1 . Conversely, MoS 2 displayed a somewhat lower PD performance of 43.5% but demonstrated remarkable stability. The intriguing result of this study relies on the synergetic effect observed when both MoS 2 and WS 2 are combined in a ratio of 20% of MoS 2 and 80% of WS 2 . This precise blend resulted in an optimized PD efficiency and exceptional stability reaching 97% upon several cycles. This finding underscores the advantageous outcomes of intermixing WS 2 and MoS 2 , shedding light on the development of an efficient and enduring photocatalyst for visible-light-driven photodegradation of methylene blue.
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Dates et versions

hal-04645899 , version 1 (12-07-2024)

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Maryam Al Qaydi, Nitul Rajput, Michael Lejeune, Abdellatif Bouchalkha, Mimoun El Marssi, et al.. Intermixing of MoS 2 and WS 2 photocatalysts toward methylene blue photodegradation. Beilstein Journal of Nanotechnology, 2024, 15, pp.817-829. ⟨10.3762/bjnano.15.68⟩. ⟨hal-04645899⟩
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