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

页码：9209 / 9214

页数：6

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