Sensing Properties Investigation of Graphene Oxide Reduced  by Various Agents for Detection of DMMP

	Sensing Properties Investigation of Graphene Oxide Reduced by Various Agents for Detection of DMMP
علوم و فناوریهای پدافند نوین
Article 1, Volume 7, Issue 4 - Serial Number 26, December 2016, Pages 269-276 PDF (1.26 M)
Author
Mostafa Najafi^*
Receive Date: 30 January 2019, Revise Date: 16 July 2025, Accept Date: 30 January 2019
Abstract
In this work, a chemiresistor gas sensor based on chemically reduced graphene oxide (CRGO) for selective detection of dimethyl methyl phosphonate (DMMP) as a nerve agent simulant was developed. The reduction of graphene oxide was performed by various reducing agents such as glucose, ascorbic acid, hydrazine hydrate and p-phenylenediamine (PPD). The efficient dispersion of CRGOs in distilled water were drop-cast onto an interdigitated electrode. Also tetrafluorohydroquinone (TFQ) was used as a second coating layer for improving sensor selectivity and sensitivity. LCR-Meter device is used for measurement of resistance changes. The sensor showed a linear dynamic range of 2-4.5 mg/L with a detection limit 0.3 mg/L for DMMP determination. Also the RSD to evaluate the repeatability of sensor for 4 replicate measurements was 1%.
Keywords
Chemiresistor; Reduced Graphene Oxide; DMMP; Gas Sensor

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