期刊
CERAMICS INTERNATIONAL
卷 43, 期 17, 页码 14873-14879出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2017.08.003
关键词
ZnO nanorods; Cr doping; First principles; Oxygen adsorption
资金
- Chongqing Research Program of Basic Research and Frontier Technology [cstc2016jcyjA0006]
- Graduate Scientific Research and Innovation Foundation of Chongqing, China [CYS16008]
The pristine and Cr-doped ZnO nanorods were successfully synthesized via a facile hydrothermal route. We found that the ethanol gas response of ZnO was improved significantly by Cr doping. In particular, the enhanced gas-sensing mechanism was investigated by first-principles calculations upon proposed surface adsorption models. The calculated results revealed that the Cr-doped ZnO (0 0 0 1) surface enabled transfer larger electrons and adsorb more oxygen molecules than that of undoped one, thus holding the potential for further enhancement in gas response of ZnO-based sensors.
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