Highly-sensitive H₂S sensors based on flame-made V-substituted SnO₂ sensing films

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• 作者：J. Sukunta^aAuthor Vitae ; A. Wisitsoraat^bAuthor Vitae ; A. Tuantranont^bAuthor Vitae ; S. Phanichphant^cAuthor Vitae ; C. Liewhiran^a ; ^c ; ^{chaikarn_l@yahoo.com}Author Vitae
• 关键词：Flame spray pyrolysis ; SnO2 ; V doping ; H2S ; Sensor
• 刊名：Sensors and Actuators B: Chemical
• 出版年：2017
• 出版时间：April 2017
• 年：2017
• 卷：242
• 期：Complete
• 页码：1095-1107
• 全文大小：4953 K
• 卷排序：242

文摘

Highly crystalline 0–2 wt% V-doped SnO2 nanoparticles (5–20 nm) were produced by flame spray pyrolysis. Structural characterizations suggested that V atoms were substitutionally doped with mainly V5+ oxidation state. H2S sensing performances were greatly enhanced at a low optimal V-doping level of 0.1 wt%. The optimal sensor exhibited a high response of 2274 with a short response time of 2.0 s to 10 ppm of H2S at 350 °C. V-doped SnO2 sensors displayed high H2S selectivity against NO, NO2, SO2, H2, C2H5OH and CH4.