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Rare Metals
Published in: Rare Metals 6/2021

07-01-2021 | Original Article

Enhanced formaldehyde sensitivity of two-dimensional mesoporous SnO2 by nitrogen-doped graphene quantum dots

Authors: Zhen-Lu Chen, Ding Wang, Xian-Ying Wang, Jun-He Yang

Published in: Rare Metals | Issue 6/2021

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Abstract

Formaldehyde (HCHO) is widely known as an indoor air pollutant, and the monitoring of the gas has significant importance. However, most HCHO sensing materials do not have low detection limits and operate at high temperatures. Herein, two-dimensional (2D) mesoporous ultrathin SnO2 modified with nitrogen-doped graphene quantum dots (N-GQDs) was synthesized. The N-GQDs/SnO2 nanocomposite demonstrated high efficiency for HCHO detection. With the addition of 1.00 wt% N-GQDs, the response (Ra/Rg) of SnO2 gas sensor increased from 120 to 361 at 60 °C for the detection of 10 × 10−6 HCHO. In addition, the corresponding detection limit was as low as 10 × 10−9. Moreover, the sensor exhibited excellent selectivity and stability for the detection of HCHO. The enhanced sensing performance was attributed to both the large specific surface area of SnO2 and electron regulation of N-GQDs. Therefore, this study presents a novel HCHO sensor, and it expands the research and application potential of GQDs nanocomposites.

Graphical abstract

previous article Cobalt monosulfide nanofibers: ethanol sensing and magnetic properties
next article DFT calculation on p-xylene sensing mechanism of (C4H9NH3)2PbI4 single crystal based on physisorption

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Appendix
Available only for authorised users
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Metadata
Title
Enhanced formaldehyde sensitivity of two-dimensional mesoporous SnO2 by nitrogen-doped graphene quantum dots
Authors
Zhen-Lu Chen
Ding Wang
Xian-Ying Wang
Jun-He Yang
Publication date
07-01-2021
Publisher
Nonferrous Metals Society of China
Published in
Rare Metals / Issue 6/2021
Print ISSN: 1001-0521
Electronic ISSN: 1867-7185
DOI
https://doi.org/10.1007/s12598-020-01636-6

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