期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 58, 期 24, 页码 8134-8138出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201903531
关键词
confined nanofluids; Fenton-like reactions; membranes; MoS2 nanosheets; reactive oxygen species
资金
- National Natural Science Research Fund of China [51708543, 51738013]
- Major Science and Technology Program for Water Pollution Control and Treatment of China [2017ZX07402001]
Heterogenous Fenton-like reactions are frequently proposed for treating persistent pollutants through the generation of reactive radicals. Despite great efforts to optimize catalyst activity, their broad application in practical settings has been restricted by the low efficiency of hydrogen peroxide or persulfate decomposition as well as ultrafast self-quenching of the activated radicals. Theoretical calculations predicted that two-dimensional (2D) metallic 1T phase MoS2 materials with exposed (001) surfaces and (100) edges should have remarkable affinity towards crucial intermediates in the peroxymonosulfate (PMS) activation process. X-ray photoelectron spectroscopy and in situ Raman spectroscopy were used to show that the exposed metallic Mo sites accelerate the rate-limiting step of electron transfer. A lamellar membrane made from a stack of 2D MoS2 with tunable interspacing was then designed as the catalyst. The non-linear transport between the MoS2 nanolayers leads to high water diffusivity so that the short-lived reactive radicals efficiently oxidize contaminants.
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