Issue 20, 2021

Olivine-type cadmium germanate: a new sensing semiconductor for the detection of formaldehyde at the ppb level

Abstract

Formaldehyde is the most popular and highly toxic indoor pollutants. It is very urgent to develop more sensitive formaldehyde gas sensors with remarkable sensitivity at the ppb level. In this study, for the first time, the olivine-structured Cd2GeO4 was identified as an excellent formaldehyde sensing material. The as-obtained Cd2GeO4 and other sensing materials were well characterized by XRD, SEM, TEM, XPS, scanning Kelvin probe and O2 temperature-programmed desorption techniques. The sensor based on the as-prepared Cd2GeO4 exhibits a high response of 14.1, a short response time (about 5 s) towards 10 ppm formaldehyde and a low detection limit of 60 ppb formaldehyde at a relatively low operating temperature of 140 °C, benefiting the practical application. We believe that the excellent formaldehyde sensing performance should be attributed to the rich chemisorbed oxygen, the small size and the appropriate Fermi level of Cd2GeO4. It can be expected that it will be a promising material for fabricating excellent formaldehyde gas sensors due to its unique sensing characteristics.

Graphical abstract: Olivine-type cadmium germanate: a new sensing semiconductor for the detection of formaldehyde at the ppb level

Supplementary files

Article information

Article type
Research Article
Submitted
18 Jūn. 2021
Accepted
04 Aug. 2021
First published
04 Aug. 2021

Inorg. Chem. Front., 2021,8, 4467-4473

Olivine-type cadmium germanate: a new sensing semiconductor for the detection of formaldehyde at the ppb level

J. Li, Q. Liang, B. Zhang, H. Chen, X. Tian, M. Fan, Y. Guo, N. Bai, X. Zou and G. Li, Inorg. Chem. Front., 2021, 8, 4467 DOI: 10.1039/D1QI00772F

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements