期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 782, 期 -, 页码 672-678出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.12.258
关键词
Fe2O3/MoO3; Heterostructure; Nanobelts; Xylene; Gas sensor
资金
- Key Program of the Chinese Academy of Sciences, China [KFZD-SW-320]
- National Natural Science Foundation of China, China [21471147]
- Program for JLU Science and Technology Innovative Research Team
- Project of Science and Technology Plan of Jilin Province
- Project of special fund for industrial innovation of Jilin Province
In this study, we report the fabrication of high-performance gas sensor based on a heterojunction structure in which Fe2O3 nanoparticles were used to decorate MoO3 nanobelts. The pure MoO3 nanobelts exhibited a response to 100 parts per million (ppm) of xylene (ratio of resistance to air and gas = 9.08), with no obviously lower cross-responses to 100 ppm of ethanol, acetone, benzene, toluene, methanol and butanol. Compared with pristine MoO3 nanobelts, Fe2O3 nanoparticles decorated nanobelts demonstrated about 2-4 times higher response toward xylene. The enhanced sensing properties of Fe2O3 nanoparticles-decorated MoO3 heterostructured nanobelts can be attributed to the formation of heterojunction between Fe2O3 and MoO3. These results, combined with other reported literature, indicate that controlled engineering of surface loading/decorating is an effective strategy for designing highly sensitive and selective semiconducting metal oxide based gas sensors. (C) 2018 Elsevier B.V. All rights reserved.
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