Abstract
Chemical stability of molybdenum disulfide (MoS2) is important for its application in catalysis fields, and related research is scarce. Herein, two types of catalysis system, activated persulfate (PS) and radical species (generated from g-C3N4 photocatalyst or decomposed from H2O2) were simulated to study the degradation of MoS2 in catalysis process. We found that MoS2 degraded partly via both of activated PS and radical species. Graphene activator of PS showed more significant degradation to MoS2 than Fe activators of PS under dark, which may due to its higher surface area and more active sites on the surface. Light irradiation enhanced the degradation of MoS2 in activated PS system with Fe activators, increased activation of PS under light irradiation. Radical species decomposed from H2O2 degraded the MoS2 under both dark and light. g-C3N4 photocatalyst could degrade MoS2 by generating radical species. Overall, these results showed that the application of MoS2 should be concerned due to its degradation in catalysis process.
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