Sub-ppm acetic acid gas sensor based on In2O3 nanofibers

Metal oxide semiconductor sensors based on nanocrystalline In 2 O 3 and its composites are found to be very sensitive in detecting low-concentration (~ 5 ppm) gases such as ozone, nitrogen dioxide, formaldehyde and butane. Here, we successfully obtained fiber-shaped In 2 O 3 crystalline nanofibers v...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials science 2019-11, Vol.54 (22), p.14055-14063
Main Authors: Wang, Yu-Chong, Sun, Zhong-Sen, Wang, Su-Zhen, Wang, Shu-Ying, Cai, Sheng-Xun, Huang, Xin-Yu, Li, Ke, Chi, Zong-Tao, Pan, Shu-Di, Xie, Wan-Feng
Format: Article
Language:English
Subjects:
Acetic acid
Acids
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Crystallography and Scattering Methods
Electronic Materials
Gas sensors
Indium oxides
Materials Science
Metal oxide semiconductors
Nanofibers
Nitrogen dioxide
Operating temperature
Polymer Sciences
Selectivity
Sensors
Solid Mechanics
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:Metal oxide semiconductor sensors based on nanocrystalline In 2 O 3 and its composites are found to be very sensitive in detecting low-concentration (~ 5 ppm) gases such as ozone, nitrogen dioxide, formaldehyde and butane. Here, we successfully obtained fiber-shaped In 2 O 3 crystalline nanofibers via electrospun and calcination routes. The gas sensing properties of the In 2 O 3 nanofibers were studied by exposing them to the acetic acid vapor with different concentrations from 500 ppb to 2000 ppm at the optimum operating temperature (250 °C). The device possesses ultra-high response of 66.7 toward 2000 ppm acetic acid vapor, low response and recovery times of 25 s and 37 s (100 ppm), respectively, and significant selectivity to acetic acid at 100 ppm. In particular, the sensor based on In 2 O 3 nanofibers has very low detection limit and can reach 500 ppb. Therefore, the presented In 2 O 3 nanofiber sensor can be used in practice in acetic acid detection area in the future.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-019-03877-y