Jump to main content
Jump to site search

Issue 13, 2020
Previous Article Next Article

A room temperature sub-ppm NO2 gas sensor based on WO3 hollow spheres

Author affiliations

Abstract

Owing to the advantages of low power consumption, convenient design and simple preparation, room temperature (RT) gas sensors have been widely studied in recent years. In this study, we fabricated a gas sensor of WO3 hollow spheres obtained using a facile hydrothermal method, which exhibited an obvious room-temperature sensing response to sub-ppm NO2 without any other assistance. Multiple techniques were utilized to characterize the structures and morphologies of the WO3 materials and a series of gas sensors was fabricated and tested for exploring the potential application of the materials. It was found that the pH values in the hydrothermal reactions played an important role in both the morphologies and the gas sensing properties for the WO3 materials. The hollow spheres prepared at a pH of 0.7 exhibited good sensing properties to sub-ppm NO2 at RT, namely a high response, low detection limit, good selectivity and repeatability. Besides, the gas sensing mechanism was also discussed briefly.

Graphical abstract: A room temperature sub-ppm NO2 gas sensor based on WO3 hollow spheres

Back to tab navigation

Supplementary files

Article information


Submitted
26 Dec 2019
Accepted
24 Feb 2020
First published
25 Feb 2020

New J. Chem., 2020,44, 5064-5070
Article type
Paper

A room temperature sub-ppm NO2 gas sensor based on WO3 hollow spheres

J. Zhao, M. Hu, Y. Liang, Q. Li, X. Zhang and Z. Wang, New J. Chem., 2020, 44, 5064
DOI: 10.1039/C9NJ06384F

Social activity

Search articles by author

Spotlight

Advertisements