Flower-Like ZnO Nanostructure for NO Sensing at Room Temperature

被引：4
|
作者：
Chang, Wei-Chen [1 ,2 ]
Yu, Wan-Chin [1 ]
Wu, Chun-Han [3 ]
Wang, Chen-Yang [3 ]
Hong, Zih-Siou [3 ]
Wu, Ren-Jang [3 ]
机构：
[1] Natl Taipei Univ Technol, Inst Organ & Polymer Mat, Taipei 10608, Taiwan
[2] Inst Nucl Energy Res, 1000 Wenhua Rd, Longtan 32546, Taoyaun, Taiwan
[3] Providence Univ, Dept Appl Chem, Taichung 43301, Taiwan
来源：
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2016年 / 16卷 / 09期
关键词：
ZnO; Nanoflower; NO Gas Sensing; Room Temperature; SENSITIZED SOLAR-CELLS; GAS SENSOR; FILM; PERFORMANCE; SELECTIVITY; TIO2;
D O I：
10.1166/jnn.2016.12892
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A flower-like nanostructure composed of zinc oxide (ZnO) nanocrystals was synthesized using a template-free aqueous solution method and investigated as a room-temperature nitric oxide (NO) gas sensing material. The flower-like ZnO nanomaterial was characterized by X-ray diffractometry, scanning electron microscopy, transmission electron microscopy, and BET specific surface area measurement. The flower-like nanostructure exhibited higher sensor responses than commercial ZnO nanoparticles. A sensor response (S = resistance of N-2 gas/resistance of NO gas) of 20.1 to 1000 ppm NO was achieved by the ZnO nanoflower, compared to a response of 5.6 for the commercial ZnO nanoparticles. The response time (T-90) and recovery time (T-R90) for the flower-like ZnO nanomaterial were 22.1 and 51.7 min, respectively. A sensing mechanism involving adsorption, surface reaction, and desorption was proposed to explain the long response and recovery times for the nanoflower.
引用
收藏
页码：9209 / 9214
页数：6
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