A pulse-driven sensor based on ordered mesoporous Ag2O/SnO2 with improved H2S-sensing performance

被引：49

作者：

Yang, Tianlin ^{[1
]}

Yang, Qiuyue ^{[1
]}

Xiao, Yan ^{[1
]}

Sun, Peng ^{[1
]}

Wang, Zhenyu ^{[1
]}

Gao, Yuan ^{[1
]}

Ma, Jian ^{[1
]}

Sun, Yanfeng ^{[1
]}

Lu, Geyu ^{[1
]}

机构：

[1] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, 2699 Qianjin St, Changchun 130012, Peoples R China

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2016年 / 228卷

基金：

中国博士后科学基金;

关键词：

Mesoporous; SnO2; Ag2O-loading; Pulse; -driven; H2S sensor; GAS-SENSING PROPERTIES; ONE-POT SYNTHESIS; SNO2; H2S; COMPOSITES; NANOSTRUCTURES; SIZE;

D O I：

10.1016/j.snb.2016.01.065

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Ordered mesoporous Ag2O/SnO2 was synthesized via nanocasting method using hexagonal mesoporous SBA-15 as template. As-prepared Ag2O/SnO2 samples were characterized by X-ray diffraction, nitrogen adsorption-desorption, transmission electron microscopy, energy-dispersive X-ray analysis, and X-ray photoelectron spectroscopy. A microspheric directly heated gas sensor based on the mesoporous Ag2O/SnO2 was fabricated, and its gas sensing performance was investigated. Results indicated that the sensor based on mesoporous Ag2O/SnO2 exhibited excellent selectivity, high response, and good stability to H2S at 100 degrees C. A pulse-driving method was then introduced to enhance the sensitivity to H2S. Under pulse-driving, the response of the sensor to 300 ppb H2S was 5.7, which was approximately two times higher than that under constant current, and the limit of detection was improved to 50 ppb. The high-sensing performance of the sensor was attributed to the composition and structure of mesoporous Ag2O/SnO2 and the pulse-driven mode. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：529 / 538

页数：10

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