Open AccessThe degradation of molybdenum disulfide nanomaterial via activated persulfate and radical species
Author(s) -
Dong Xu,
Huiwen Tan,
Yongpei Wei
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/510/4/042007
Subject(s) - persulfate , molybdenum disulfide , catalysis , degradation (telecommunications) , chemistry , photocatalysis , photochemistry , molybdenum , nanomaterials , radical , irradiation , chemical engineering , inorganic chemistry , materials science , nanotechnology , organic chemistry , telecommunications , computer science , engineering , physics , nuclear physics
Chemical stability of molybdenum disulfide (MoS 2 ) 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-C 3 N 4 photocatalyst or decomposed from H 2 O 2 ) were simulated to study the degradation of MoS 2 in catalysis process. We found that MoS 2 degraded partly via both of activated PS and radical species. Graphene activator of PS showed more significant degradation to MoS 2 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 MoS 2 in activated PS system with Fe activators, increased activation of PS under light irradiation. Radical species decomposed from H 2 O 2 degraded the MoS 2 under both dark and light. g-C 3 N 4 photocatalyst could degrade MoS 2 by generating radical species. Overall, these results showed that the application of MoS 2 should be concerned due to its degradation in catalysis process.