Ethanol-sensing performance of tin dioxide octahedral nanocrystals with exposed high-energy {111} and {332} facets

被引：47
|
作者：
Wang, Chenxia [1 ]
Cai, Daoping [1 ]
Liu, Bin [1 ]
Li, Han [1 ]
Wang, Dandan [1 ]
Liu, Yuan [1 ]
Wang, Lingling [1 ]
Wang, Yanrong [1 ]
Li, Qiuhong [1 ]
Wang, Taihong [1 ]
机构：
[1] Xiamen Univ, Pen Tung Sah Inst Micronano Sci & Technol, Xiamen, Peoples R China
来源：
JOURNAL OF MATERIALS CHEMISTRY A | 2014年 / 2卷 / 27期
基金：
中国国家自然科学基金;
关键词：
SENSITIZED SOLAR-CELLS; SNO2; NANOWIRES; NANOPARTICLES; SENSOR; NANOTUBES; NANORODS; SURFACE;
D O I：
10.1039/c4ta00844h
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Tin dioxide octahedral nanocrystals with exposed high-energy {111} and {332} facets were hydrothermally synthesized and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and selected-area electron diffraction (SAED). Gas sensors were fabricated from the prepared SnO2 nanocrystals and applied to ethanol-sensing tests. Octahedral SnO2 {332} exhibited a maximum response of 2200 under an ethanol concentration of 800 ppm at 250 degrees C with a response time of 1.5 s and a recovery time of 32.5 s, whereas SnO2 {111} exhibited a maximum response of 179 at 360 degrees C with a response time of 9.5 s and a recovery time of 6.7 s. The sensing mechanisms responsible for SnO2 nanocrystals to ethanol vapor are discussed.
引用
收藏
页码：10623 / 10628
页数：6
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