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Alcohols Assisted Hydrothermal Synthesis of Defect‐Rich MoS 2 and Their Applications in Humidity Sensing
Author(s) -
Leng Xiaohui,
Wang Yiming,
Wang Fei
Publication year - 2019
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201900010
Subject(s) - materials science , hydrothermal circulation , molybdenum disulfide , ethylene glycol , raman spectroscopy , scanning electron microscope , fourier transform infrared spectroscopy , humidity , crystallization , doping , polyethylene glycol , chemical engineering , infrared spectroscopy , hydrothermal synthesis , absorbance , analytical chemistry (journal) , organic chemistry , optoelectronics , chemistry , optics , composite material , chromatography , physics , engineering , thermodynamics
The influence of different alcohols on hydrothermal synthesis of molybdenum disulfide (MoS 2 ) has been studied. X‐ray diffraction and scanning electron microscope results show that MoS 2 synthesized in water and water/polyethylene glycol exhibits good flower‐like crystallization while in ethanol/water, ethylene glycol/water, and glycerol/water, the MoS 2 shows a smaller size of 3D flower structure and larger layer distance. Strong absorbance peaks in Fourier‐transform infrared spectroscopy and Raman spectra indicate oxygen doping in MoS 2 . These defects from oxygen doping induce a good sensitivity to water vapor in the environment. A lower hydrothermal temperature (i.e., 180 and 200 °C) results in these defect rich MoS 2 and benefits the humidity sensing performance.