Journal
CERAMICS INTERNATIONAL
Volume 42, Issue 7, Pages 9327-9331Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2016.02.160
Keywords
MoS2 hierarchical nanostructures; Au nanoparticles; Nanocomposites; Gas sensors
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Funding
- National Natural Science Foundation of China [61102006]
- Natural Science Foundation of Shandong Province, China [ZR2015EM019, ZR2014EL006]
- Shandong Province Higher Educational Science and Technology Program [J15LA56]
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Two-dimensional molybdenum disulfide (MoS2) is one kind of the promising candidate for gas sensing materials at low temperature. Meanwhile, surface modification with noble metals is considered as an effective strategy to enhance gas sensing performance. In this work, a novel gas sensing material was prepared by decorating Au nanoparticles on MoS2 hierarchical nanostructures. The morphology and microstructure were characterized by X-ray diffraction (XRD), X-ray photoelectron spectra (XPS), field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM). The results clearly reveal that Au nanoparticles with sizes of 10-20 nm were deposited on the surface of MoS2 nanosheets, remaining isolated from each other and the dispersion is very uniform. Furthermore, the MoS2 hierarchical nanostructures are further employed as a support to load Au nanoparticles to construct nanocomposites for chemical gas sensors. Experimental results indicated that the Au nanoparticles-functionalized MoS2 hierarchical nanostructures, combining the high surface and catalytic activity of small Au nanoparticles demonstrated gas-sensing performance to NH3 at low temperature. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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