Oximation reaction induced reduced graphene oxide gas sensor for formaldehyde detection

Zhou, Lei, Qian, Rong, Zhou, Shangjun, Chen, Qiao, Wen, Zhaoyin and Li, Gourong (2020) Oximation reaction induced reduced graphene oxide gas sensor for formaldehyde detection. Journal of Saudi Chemical Society. ISSN 1319-6103

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Abstract

High-performance gas sensors can offer great potentials for monitoring and detection ofvolatile organic compounds (VOCs) in both domestic and industrial environment. In the presentwork, a new HCHO gas sensor was constructed with reduced graphene oxide (RGO) induced bythe oximation reaction. The gas-sensing performance test results suggested that the RGO hydrox-ylamine hydrochloride (RGO/HA-HCl) sensor presented a high response of 75% at 16 ppm HCHOat room temperature, and a high selectivity for HCHO suffering little interference with high concen-trations of volatile organic compounds, including methanol, ethanol, and methylbenzene, dichlor-omethane and water. Additionally, the RGO/HA-HCl sensor also showed a good long-termstability with RSD of 5.83% for a 15-day continuous sensing test, and the detection limit (DL)could reach 0.023 ppm under ambient conditions. Moreover, the mechanism for the high sensitivityand selectivity of formaldehyde was further established by in-situ gas chromatography mass spec-trometry (GC–MS). This work would provide a reliable new HCHO gas sensor which could be usedfor monitoring and forewarning the emission of HCHO for a better protection and improvement ofour environment.

Item Type: Article
Schools and Departments: School of Life Sciences > Chemistry
Depositing User: Qiao Chen
Date Deposited: 03 Mar 2020 12:00
Last Modified: 05 Mar 2020 16:00
URI: http://sro.sussex.ac.uk/id/eprint/90229

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