Highly sensitive gas sensors based on hollow SnO2 spheres prepared by carbon sphere template method

被引：119
作者：
Wang, Caihong [1 ]
Chu Xiangfeng [1 ]
Wu Mingmei [1 ]
机构：
[1] Zhongshan Univ, Sch Chem & Chem Engn, Guangzhou 510275, Peoples R China
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2007年 / 120卷 / 02期
关键词：
SnO2; hollow sphere; gas sensor;
D O I：
10.1016/j.snb.2006.03.004
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Hollow SnO2 spheres were prepared in dimethylfomamide (DMF) by controlled hydrolysis of SnCl2 using newly made carbon microspheres as templates. The phase composition and morphology of the material particles were characterized by means of X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. The gas sensing properties of sensors based on the hollow SnO2 spheres were investigated. It was found that the sensor exhibited good performances, characterized by high response, good selectivity and very short response time to dilute (C2H5)(3)N operating at 150 degrees C, especially, the response to 1 ppb (C2H5)(3)N attained 7.1 at 150 degrees C. It was noteworthy that the response to 0.1 ppm C2H5OH of the sensor was 2.7 at 250 degrees C. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：508 / 513
页数：6
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