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

Visible-light-driven photocatalysis using layered materials has garnered increasing attention regarding the degradation of organic dyes. Herein, transition-metal dichalcogenides MoS and WS 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 exhibited the highest PD efficiency of 67.6% and achieved an impressive PD rate constant of 6.1 × 10 min . Conversely, MoS 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 and WS are combined in a ratio of 20% of MoS and 80% of WS . 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 and MoS , shedding light on the development of an efficient and enduring photocatalyst for visible-light-driven photodegradation of methylene blue.