Highly improved ethanol gas-sensing performance of mesoporous nickel oxides nanowires with the stannum donor doping
Highly improved ethanol gas-sensing performance of mesoporous nickel oxides nanowires with the stannum donor doping
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锡供体掺杂介孔氧化镍纳米线显着改善乙醇气敏性能
DOI：
10.1088/1361-6528/aab9d8
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发表时间：
2018-04
期刊：
影响因子：
3.5
通讯作者：
Xinqing Wang
中科院分区：
文献类型：
--
作者：
Junqi Wei;Xiaoqing Li;Yanbing Han;Jingcai Xu;Hongxiao Jin;Dingfeng Jin;Xiaoling Peng;Bo Hong;Jing Li;Yanting Yang;Hongliang Ge;Xinqing Wang
采用SBA-15模板，采用纳米铸造法合成了介孔氧化镍（NiO）和锡（Sn）掺杂的NiO纳米线（NWs）。利用X射线衍射、透射电子显微镜、能谱、氮吸附/解吸等温线和紫外可见光谱对所制备样品的相结构、成分和微观结构进行了表征。气敏分析表明，Sn掺杂可以大大提高介孔NiO纳米线的乙醇敏感性。随着Sn含量的增加，在340℃下，对100 ppm乙醇气体的乙醇敏感性从NiO NW的2.16增加到Ni0.962Sn0.038O1.038的最大值15.60，然后下降到Ni0.946Sn0.054O1.054的12.24。 Sn掺杂带来的高表面积提高了NiO纳米线表面对氧的吸附，从而导致空气中的表面电阻更小。此外，由于空穴积累中的空穴与来自施主杂质能级的电子的复合以及Sn掺杂的体缺陷的增加，乙醇气体中的总电阻大大增强。结论是，通过 Sn 掺杂的更高表面积和高价施主取代，可以大大提高 Sn 掺杂 NiO 纳米线传感器的灵敏度。
Mesoporous nickel oxides (NiO) and stannum(Sn)-doped NiO nanowires (NWs) were synthesized by using SBA-15 templates with the nanocasting method. X-ray diffraction, transmission electron microscope, energy dispersive spectrometry, nitrogen adsorption/desorption isotherm and UV–vis spectrum were used to characterize the phase structure, components and microstructure of the as-prepared samples. The gas-sensing analysis indicated that the Sn-doping could greatly improve the ethanol sensitivity for mesoporous NiO NWs. With the increasing Sn content, the ethanol sensitivity increased from 2.16 for NiO NWs up to the maximum of 15.60 for Ni0.962Sn0.038O1.038, and then decreased to 12.24 for Ni0.946Sn0.054O1.054 to 100 ppm ethanol gas at 340 °C. The high surface area from the Sn-doping improved the adsorption of oxygen on the surface of NiO NWs, resulting in the smaller surface resistance in air. Furthermore, owing to the recombination of the holes in hole-accumulation lay with the electrons from the donor impurity level and the increasing the body defects for Sn-doping, the total resistance in ethanol gas enhanced greatly. It was concluded that the sensitivity of Sn-doped NiO NWs based sensor could be greatly improved by the higher surface area and high-valence donor substitution from Sn-doping.
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影响因子：
6.2
作者：
Xiaojiong Chen;Junqi Wei;Xinyou Wang;Panfeng Wang
通讯作者：
Xiaojiong Chen;Junqi Wei;Xinyou Wang;Panfeng Wang
DOI：
10.1016/s1452-3981(23)16909-4
发表时间：
2012-11
影响因子：
1.5
作者：
F. Lupo;A. Tuel;C. Francia;G. Meligrana;S. Bodoardo;C. Gerbaldi
通讯作者：
F. Lupo;A. Tuel;C. Francia;G. Meligrana;S. Bodoardo;C. Gerbaldi
海胆状六角WO3微球：水热合成和气敏性能
影响因子：
3
作者：
Bin Miao;Shuoqing Zhao;Yanqiong Li;He Zhang
通讯作者：
He Zhang
影响因子：
8.4
作者：
Kim, Hyo-Joong;Choi, Kwon-Il;Lee, Jong-Heun
通讯作者：
Lee, Jong-Heun
NiO纳米晶组装超长NiO纳米线的合成及其增强气敏性能
影响因子：
8.4
作者：
Liu, Bin;Yang, Heqing;Chen, Yan
通讯作者：
Chen, Yan