标题:Synthesis and gas sensing performance of NiO decorated SnO2 vertical-standing nanotubes composite thin films
作者:Zhang, Lei ;He, Jing ;Jiao, Wanli
作者机构:[Zhang, Lei ;He, Jing ;Jiao, Wanli ] School of Material Science and Engineering, Shandong University of Technology, Zibo; 255049, China
通讯作者:Jiao, Wanli
来源:Sensors and Actuators, B: Chemical
出版年:2019
卷:281
页码:326-334
DOI:10.1016/j.snb.2018.10.121
摘要:In this work, a new type NiO decorated SnO2 vertical-standing nanotubes composite thin film was synthesized successfully via a facile hydrothermal method. The microstructure, physico-chemical surface state and morphology of the composite thin film were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM), respectively. The results showed that the NiO decorated SnO2 vertical-standing nanotubes composite thin film with a coral-like microstructure was built of numerous 1D SnO2 nanotubes with the size of 200–300 nm in diameter and 1.5 μm in length; while NiO nanoplates with the size of 20 nm in diameter decorated on the surface of SnO2 nanotubes. Due to the enhanced adsorption of oxygen molecules, formation of p-NiO/n-SnO2 heterojunction and porous structure, the NiO/SnO2 thin film gas sensor with an Ni2+/Sn4+ molar ratio of 5% exhibited high response value, good selectivity and quick response characteristics to ethanol at the optimum working temperature of 250 ℃.
© 2018 Elsevier B.V.
收录类别:EI
资源类型:期刊论文
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