Layered MoS2 Prepared by Liquid Phase Exfoliation and Its Application to Room Temperature Gas Sensing
碩士 === 國立成功大學 === 材料科學及工程學系 === 104 === This study investigates room temperature gas sensing of MoS2 nanosheets synthesized by liquid phase exfoliation followed by annealing in oxygen atmosphere. Scanning electron microscopy images clearly showed that 45vol% ethanol could exfoliate bulk MoS2 into na...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2016
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| Online Access: | http://ndltd.ncl.edu.tw/handle/15211047669409288660 |
| Summary: | 碩士 === 國立成功大學 === 材料科學及工程學系 === 104 === This study investigates room temperature gas sensing of MoS2 nanosheets synthesized by liquid phase exfoliation followed by annealing in oxygen atmosphere. Scanning electron microscopy images clearly showed that 45vol% ethanol could exfoliate bulk MoS2 into nanosheets. Raman spectrometry and ultraviolet-visible spectrometry also showed that 45vol% ethanol successfully exfoliated bulk MoS2 into few layers. The structure of MoS2 nanosheets was analyzed using Transmission electron microscopy. X-ray photoelectron spectroscopy clearly showed that Mo and S were partially oxidized. Using annealing in oxygen atmosphere, as surface modification, the performance of MoS2 gas sensing could be improved. Using oxidized MoS2 nanosheets, the sensitivity of 0.7ppm NH3 was enhanced from 8.1% to 8.6% at room temperature.
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