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Selective Detection of Toxic C1 Chemicals Using a Hydroxylamine-Based Chemiresistive Sensor Array

Chahal, Mandeep Kaur, Sumita, Masato, Labuta, Jan, Payne, Daniel Tony, Hill, Jonathan P., Yamauchi, Yusuke, Nakanishi, Takashi, Tanaka, Takeshi, Kataura, Hiromichi, Koga, Kenji, and others. (2023) Selective Detection of Toxic C1 Chemicals Using a Hydroxylamine-Based Chemiresistive Sensor Array. ACS Sensors, 8 (4). pp. 1585-1592. E-ISSN 2379-3694. (doi:10.1021/acssensors.2c02720) (Access to this publication is currently restricted. You may be able to access a copy if URLs are provided) (KAR id:103533)

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Formaldehyde (FA) is a deleterious C1 pollutant commonly found in the interiors of modern buildings. C1 chemicals are generally more toxic than the corresponding C2 chemicals, but the selective discrimination of C1 and C2 chemicals using simple sensory systems is usually challenging. Here, we report the selective detection of FA vapor using a chemiresistive sensor array composed of modified hydroxylamine salts (MHAs, ArCH2ONH2·HCl) and single-walled carbon nanotubes (SWCNT). By screening 32 types of MHAs, we have identified an ideal sensor array that exhibits a characteristic response pattern for FA. Thus, trace FA (0.02–0.05 ppm in air) can be clearly discriminated from the corresponding C2 chemical, acetaldehyde (AA). This system has been extended to discriminate methanol (C1) from ethanol (C2) in combination with the catalytic conversion of these alcohols to their corresponding aldehydes. Our system offers portable and reliable chemical sensors that discriminate the subtle differences between C1 and C2 chemicals, enabling advanced environmental monitoring and healthcare applications.

Item Type: Article
DOI/Identification number: 10.1021/acssensors.2c02720
Subjects: Q Science > QD Chemistry
Divisions: Divisions > Division of Natural Sciences > Chemistry and Forensics
Depositing User: Mandeep Kaur Chahal
Date Deposited: 09 Nov 2023 09:21 UTC
Last Modified: 10 Nov 2023 09:52 UTC
Resource URI: (The current URI for this page, for reference purposes)

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Chahal, Mandeep Kaur.

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