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- Title
Sensor film based on electrical resistance of graphene nanoplatelets and polystyrene (XGNP/PS): fabrication, characterization, and application.
- Authors
Costa, Joicy Bianca de Souza; Silva, Felipe de Andrade Oliveira; Trindade, Felipe Cunha da Silva; Lavorante, André Fernando; Gomes, Daniel de Filgueiras; Figueiredo, José Fernando Dagnone; Paim, Ana Paula Silveira
- Abstract
The objective of this work was to develop a sensor based on variation of the electrical resistance of graphene-polystyrene sensor film (10.0% XGNP/PS (m/m)) for the determination of ammonia gas in broiler manure samples. The proposed sensor was designed using a data acquisition system, a detection system, a sample compartment, and a detection cell. The characterization of the sensor film by RAMAN, TGA and MEV indicated the formation of a new material with improved thermal and electrical characteristics. From a full factorial design, the influence of four analysis factors on the variation of the electrical resistance of the XGNP/PS composite was studied to determine the best conditions for ammonia gas detection. The variables established were electrical voltage 0 V, time interval of the measurement step 200 s, time interval of the cleaning step 400 s, and sample volume 10 mL. Linear responses were obtained for concentrations of 5–30 mg L−1 (S = (10.643 ± 0.201) + (0.219 ± 0.013)*C, where S signal and C concentration in mg L−1, R = 0.996) with detection and quantification limits of 0.046 mg L−1 and 0.154 mg L−1, respectively, and relative standard deviation (RSD) of 0.05% (n = 3, 15 mg L−1 ammonia). The use of this proposed sensor is a simple, viable and versatile option, as it provides a sensitive and fast response at room temperature with low sample consumption.
- Subjects
MANURE gases; DATA acquisition systems; AMMONIA gas; NANOPARTICLES; POLYSTYRENE; AMMONIA
- Publication
Journal of Materials Science: Materials in Electronics, 2022, Vol 33, Issue 18, p14927
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-022-08409-0