Interaction Mechanism Between Multi-Layered Mos2 And H2o2 For Self-Generation Of Reactive Oxygen Species
ENVIRONMENTAL RESEARCH(2020)
摘要
Elucidating the generation mechanism of reactive oxygen species (ROS) is essential for advanced oxidation processes with respect to environmental and biological sciences. Herein, self-generation of ROS such as hydroxyl radicals (center dot OH), superoxide radicals (O-2(center dot-)) and singlet oxygen (O-1(2)) from the interaction between multi-layered flowerlike MoS2 nanosheets and H2O2 is presented. The results demonstrate that H2O2 can exfoliate multilayered MoS2 into quantum dots and promote a 2H to 1 T phase change accompanied by the dissolution of MoS2 to produce H+, MoO42+ and SO42-. Electron spin resonance (ESR) spectroscopy confirm the production of center dot OH, superoxide radicals O-2(center dot-) and O-1(2) in the MoS2/H2O2 system. The calculation data based on density functional theory (DFT) indicate that the 1 T-MoS2 can lower the free energy profiles for stepwise catalytic decomposition of H2O2 to produce ROS as compared to 2H-MoS2.
更多查看译文
关键词
MoS2, Reactive oxygen species, Exfoliation, Phase transition, Methyl orange degradation
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要