Highly sensitive sensor based on ordered porous ZnO nanosheets for ethanol detecting application

被引：118
作者：
Li, Qichao [1 ,2 ]
Chen, Di [1 ,2 ]
Miao, Jianmin [1 ,2 ]
Lin, Shujing [1 ,2 ]
Yu, Zixian [1 ,2 ]
Cui, Daxiang [1 ,2 ]
Yang, Zhi [1 ]
Chen, Xianping [3 ,4 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Elect Informat & Elect Engn, Key Lab Thin Film & Microfabricat Technol, Minist Educ, 800 Dongchuan Rd, Shanghai 200240, Peoples R China
[2] Shanghai Engn Res Ctr Intelligent Diag & Treatmen, 800 Dongchuan Rd, Shanghai 200240, Peoples R China
[3] Chongqing Univ, Educ Minist China, Key Lab Optoelect Technol & Syst, Chongqing 400044, Peoples R China
[4] Chongqing Univ, Coll Optoelect Engn, Chongqing 400044, Peoples R China
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2021年 / 326卷
基金：
中国国家自然科学基金;
关键词：
Gas sensors; Ethanol sensing; Ordered ZnO nanosheets; Formation mechanism; Sensing mechanism; GAS-SENSING PROPERTIES; HYDROTHERMAL SYNTHESIS; ORGANIC FRAMEWORK; NANOPARTICLES; NANORODS; MICROSPHERES; PERFORMANCE; SNO2; NANOSTRUCTURES; HETEROJUNCTION;
D O I：
10.1016/j.snb.2020.128952
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Ethanol sensors with high sensitivity are demanded for healthcare and environmental monitoring applications, especially in drunk driving detection. In this work, we present a high-performance gas sensor based on ordered porous ZnO (PZnO) nanosheets with a low cost. Gas sensing tests show that PZnO exhibits the highest ethanol sensing responsiveness at 307 degrees C to some toxic organic volatiles. The response of our PZnO based sensor is 212.0 toward 200 ppm ethanol vapor, the response and recovery time are only 8 s and 7 s, respectively. Compared with other ZnO based sensors shown in recent literatures, our PZnO based sensor exhibits faster response/recovery speed and higher sensitivity, which can be ascribed to the single-crystalline feature, more (002) facets exposure, ordered porous structure and a large amount of oxygen vacancy on the sensitive surface according to the sensing mechanism and density functional theory simulation study. The response also shows good linear relationship with the ethanol concentration in logarithm. Besides, the PZnO sensor is immune to high relative humidity. These characteristics enable PZnO based sensors for ethanol detecting applications.
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页数：10
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