Enhanced ethanol-sensing characteristics of Au decorated In-doped SnO2 porous nanotubes at low working temperature

被引：22
作者：
Chen, Long [1 ]
Shi, Haozhou [1 ]
Ye, Chenjia [1 ]
Xia, Xiaoyu [1 ]
Li, Yi [1 ]
Pan, Chenying [1 ]
Song, Yanhua [1 ]
Liu, Jun [1 ]
Dong, Hao [2 ]
Wang, Di [2 ]
Chen, Xing [1 ]
机构：
[1] Zhejiang Univ, Dept Biomed Engn, Biosensor Natl Special Lab, Hangzhou 310027, Peoples R China
[2] Intelligent Percept Res Inst, Zhejiang Lab, Hangzhou, Peoples R China
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2023年 / 375卷
基金：
中国国家自然科学基金;
关键词：
Electrospinning; SnO2; Porous nanotubes; Ethanol gas sensor; MICRO GAS SENSOR; IN2O3; NANOFIBERS; ROOM-TEMPERATURE; PERFORMANCE; NANORODS; FABRICATION;
D O I：
10.1016/j.snb.2022.132864
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
In this work, Au decorated In-doped SnO2 (Au@In2O3-SnO2) porous nanotubes (PNTs) were fabricated via electrospinning and a subsequent calcination treatment. The In-doped SnO2 PNTs with various Au/Sn molar ratios possessed good ethanol sensing properties. As a result, the 3 % mol Au decorated In-doped SnO2 PNTs had high response to ethanol (Ra/Rg = 316.8-100 ppm) and can detect ethanol down to 50 ppb at a low working temperature of 150 degrees C. In addition, the gas sensor also had high selectivity, good reversibility and long-term stability. The enhanced sensing performance was mainly ascribed to the increase of oxygen vacancies, cata-lytic activity of Au nanocatalysts, and porous structures. The sensing results demonstrated that Au@In2O3-SnO2 PNTs had the great potential for ethanol detecting, and provide a facile method for rationally designing other types of gas sensors.
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页数：10
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