Hydrothermally synthesized ZnO hierarchical structure for lower concentration methane sensing

•The hierarchical structure ZnO was synthesized by one-step hydrothermal method.•The response of the sensor has a good linear with the lower concentration of CH4.•Hierarchical ZnO sensor has a low initial CH4 response concentration (10 ppm).•Hierarchical ZnO sensor has good stability.•The gas sensin...

Full description

Saved in:
Bibliographic Details
Published in:Materials letters 2019-11, Vol.254, p.242-245
Main Authors: Yang, Yanqiong, Wang, Xiaodong, Yi, Guiyun, Li, Huimin, Shi, Chuang, Sun, Guang, Zhang, Zhanying
Format: Article
Language:English
Subjects:
Crystal structure
Detection
Gas sensing
Gas sensors
Hierarchical ZnO
Hydrothermal crystal growth
Materials science
Methane
Microstructure
Morphology
Performance tests
Sensors
Structural hierarchy
Zinc oxide
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•The hierarchical structure ZnO was synthesized by one-step hydrothermal method.•The response of the sensor has a good linear with the lower concentration of CH4.•Hierarchical ZnO sensor has a low initial CH4 response concentration (10 ppm).•Hierarchical ZnO sensor has good stability.•The gas sensing mechanism of the hierarchical ZnO sensor for CH4 is discussed. Hierarchical microstructure ZnO was successfully prepared by a simple one-step hydrothermal method and annealing process, and its crystal structure, morphology and pore distribution were characterized. The gas sensing performance test results show that the response of the ZnO sensor has a good linear relationship with 10–500 ppm of methane, and the sensor has a low initial methane response concentration with good sensitivity and stability. This work implies that this hierarchical ZnO is expected to be a potential candidate for low-concentration methane sensing.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2019.07.081