Fabrication of Lettuce-Like ZnO Gas Sensor with Enhanced H2S Gas Sensitivity

Crystals

Xiangyue Wang¹  Jie Gao²  Longxiao Xu³  Tianyu Liu³  Chun Zhao³  Ziyang Yu³  Yueying Liu³  Hui Suo³ 

[1] College of Chemistry, Jilin University, Changchun 130118, China;College of Electronic Science and Engineering, Jilin University, Changchun 130118, China;State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130118, China;

关键词: zno;    microspheres;    gas sensors;    h₂s;    fast response;   

DOI  :  10.3390/cryst10030145

来源: DOAJ

【 摘 要 】

In this work, a lettuce-like ZnO gas sensor with high sensitivity for H₂S detection was successfully fabricated by a one-step hydrothermal method. Characterization analysis of the phases, crystallinities, morphology, and chemical compositions indicated that lettuce-like ZnO has a lettuce-like microsphere structure composed of wurtzite hexagonal ZnO sheets. A gas sensitivity test of the lettuce-like ZnO showed that the sensor had a high H₂S response (113.04 for 100 ppm H₂S) and H₂S selectivity. The lettuce-like ZnO sensor has fast response characteristics while maintaining high sensitivity, and has a response time as low as 15 seconds and a recovery time of 90 seconds, and the detection limit reaches 1 ppm. The sensitive mechanism of lettuce-like ZnO sensor to H₂S is also discussed.

【 授权许可】

Unknown