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- Title
Highly sensitive, selective, repeatable and flexible chemiresistive NO<sub>2</sub> sensor based on reduced graphene oxide/free based porphyrin composite.
- Authors
Khune, Abhaysinh S.; Bongane, Rameshwar P.; Narwade, Vijaykiran N.; Ingle, Nikesh N.; Dole, B. N.; Tsai, Meng-Lin; Hianik, Tibor; Shirsat, Mahendra D.
- Abstract
A highly sensitive and selective nitrogen dioxide (NO2) sensor has been developed using reduced graphene oxide (rGO)/5-(4-Methoxycarbonylphenyl)-10,15,20-triphenyl-21H,23H-porphine (MCPTPP) composite. The rGO was prepared by thermal reduction of graphene oxide (GO), which was synthesized via an improved Hummer’s method. Using a drop-casting technique, the rGO/MCPTPP composite was deposited on an Indium Tin Oxide (ITO) flexible electrode. Various rGO/MCPTPP composites were developed by varying MCPTPP concentrations. A range of characterization tools confirmed the successful synthesis of the materials. The rGO/MCPTPP_1:3 composite exhibited high sensitivity, rapid response, and a recovery time of 31s. and 81s. respectively when exposed to 250 ppm NO2 at room temperature (RT). The sensor demonstrated good repeatability, excellent 60-day stability, and linearity from 50 to 500 ppm of NO2 concentration. The developed flexible chemiresistive sensor displayed excellent selectivity for NO2 among all the tested gases. The significant enhancement in NO2 sensing performance is attributed to the synergistic effect between rGO and MCPTPP. This work highlights the potential of the rGO/MCPTPP composite for sensitive and selective chemiresistive detection of NO2, making it promising for environmental monitoring and chemical industry applications.
- Publication
Journal of Materials Science: Materials in Electronics, 2024, Vol 35, Issue 9, p1
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-024-12413-x