期刊
JOURNAL OF NANOPARTICLE RESEARCH
卷 19, 期 12, 页码 -出版社
SPRINGER
DOI: 10.1007/s11051-017-4089-y
关键词
Nanowires; Nickel oxide; Fe-doping; Gassensing properties
资金
- National Natural Science Foundation of China [51202235]
- Foundation of Science and Technology Department of Zhejiang Province [2017C33078]
In this paper, nickel oxides (NiO) and iron (Fe)-doped NiO nanowires (NWs) with the various doping content (from 1 to 9 at%) were synthesized by using SBA-15 templates with the nanocasting method. All samples were synthesized in the same conditions and exhibited the same mesoporous-structures, uniform diameter, and defects. Mesoporous-structures with high surface area created more active sites for the adsorption of oxygen on the surface of all samples, resulting in the smaller surface resistance in air. The impurity energy levels from the donor Fe-doping provided electrons to neutralize the holes of p-type Fe-doped NiO NWs, which greatly enhanced the total resistance. The comparative gas-sensing study between NiO NWs and Fedoped NiO NWs indicated that the high-valence donor Fe-doping obviously improved the ethanol sensitivity and selectivity for Fe-doped NiO NWs. And Ni0.94Fe0.06O1.03 NWs sensor presented the highest sensitivity of 14.30 toward ethanol gas at 320 degrees C for the high-valence metal-doping.
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