Fabrication of polypyrrole/tin oxide/graphene nanoribbon ternary nanocomposite and its high-performance ammonia gas sensing at room temperature

• Published in: Materials science & engineering. B, Solid-state materials for advanced technology Vol. 272; p. 115317
• Main Authors: Hsieh, Chia-Hsun, Xu, Ling-Hui, Wang, Jie-Mao, Wu, Tzong-Ming
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01-10-2021; Elsevier BV
• Subjects: Ammonia; Ammonia gas sensor; Chemical synthesis; Composite; Dynamic tests; Gas sensors; Graphene; Graphene nanoribbon; Kidney diseases; Nanocomposites; Nanoparticles; Nanoribbons; Polypyrrole; Polypyrroles; Reproducibility; Room temperature; Selectivity; Sensors; Tin dioxide; Tin oxide; Tin oxides; Composite; Tin oxide; Polypyrrole; Graphene nanoribbon; Ammonia gas sensor
• ISSN: 0921-5107; 1873-4944
• DOI: 10.1016/j.mseb.2021.115317

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In this study, the polypyrrole (PPy)/tin oxide (SnO2)/graphene nanoribbon (GNR) ternary nanocomposites are successfully synthesized using in situ chemical oxidative polymerization. In doing so, the SnO2 nanoparticles fabricated using a solvothermal reaction are coated on the surface of the GNR. The gas sensing performances of nanocomposites at room temperature are estimated by a homemade dynamic test system, equipped with a simultaneous resistance measurement platform. The response value of the PPy/SnO2/GNR sensor containing 3-wt% SnO2 nanoparticles with an exposure of 1-ppm NH3 is 92.7, which is roughly three times greater than that of a pure PPy sensor. This composite sensor can sensitively detect the NH3 between concentrations of 0.6 and 2 ppm at room temperature. The PPy/SnO2/GNR sensor also has higher repeatability and selectivity when exposed to 1- and 2-ppm NH3 at room temperature than existing sensor. Due to the outstanding repeatability and selectivity, it is evident that the PPy/SnO2/GNR nanocomposite sensor is a promising gas sensing material for the detection of the hepatic or kidney disease in human breath.