Ultra-sensitive H2S sensors based on hydrothermal/impregnation-made Ru-functionalized WO3 nanorods

被引：81
作者：
Kruefu, V. [1 ]
Wisitsoraat, A. [2 ]
Tuantranont, A. [2 ]
Phanichphant, S. [3 ]
机构：
[1] Maejo Univ, Fac Sci, Mat Sci Program, Chiang Mai 50290, Thailand
[2] Natl Sci & Technol Dev Agcy, Natl Elect & Comp Technol Ctr, Pathum Thani 12120, Thailand
[3] Chiang Mai Univ, Fac Sci, Mat Sci Res Ctr, Chiang Mai 50200, Thailand
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2015年 / 215卷
关键词：
Gas sensor; Hydrogen sulfide (H2S); Hydrothermal/impregnation syntheses; One-dimensional (1D) nanostructures; Ru-WO3; nanorods; GAS-SENSING PROPERTIES; ELECTROCHROMIC PROPERTIES; NANOWIRES; ACETONE; FILMS; SNO2; NO2;
D O I：
10.1016/j.snb.2015.03.037
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Ultra-sensitive H2S gas sensors based on the hydrothermal/impregnation-synthesized WO3 one-dimensional (1D) nanostructures functionalized with Ru are presented. The particle properties were characterized by XRD, BET, SEM, TEM and EDS analyses. The H2S-sensing performances in terms of sensor response, response/recovery times and selectivity were optimized by varying Ru concentration. The optimal sensing film (0.50 wt% Ru-WO3) showed an ultra-high sensor response of similar to 192 and short response time of 0.8 s to 10 ppm of H2S at 350 degrees C. In addition, 0.50 wt% Ru-WO3 nanorods (NRs) exhibited much higher H2S selectivity against NO2, SO2, C2H5OH and NH3 compared with unloaded WO3 NRs. Furthermore, the catalyst selectivity of Ru toward H2S was found to be significantly higher than those of three other metals including Ni, Nb and Au, respectively. Therefore, 0.50 wt% Ru-WO3 sensor is one of the most promising candidates for highly sensitive and selective detection of H2S. (C) 2015 Elsevier B.V. All rights reserved.
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页码：630 / 636
页数：7
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