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NH3 Sensor Based on rGO-PANI Composite with Improved Sensitivity.
Hadano, Fabio Seiti; Gavim, Anderson Emanuel Ximim; Stefanelo, Josiani Cristina; Gusso, Sara Luiza; Macedo, Andreia Gerniski; Rodrigues, Paula Cristina; Mohd Yusoff, Abd Rashid Bin; Schneider, Fabio Kurt; Deus, Jeferson Ferreira de; José da Silva, Wilson.
Afiliação
  • Hadano FS; Graduate Program in Electrical and Computer Engineering, Federal University of Technology-Paraná, Curitiba 80230-901, Brazil.
  • Gavim AEX; Graduate Program in Electrical and Computer Engineering, Federal University of Technology-Paraná, Curitiba 80230-901, Brazil.
  • Stefanelo JC; Institute of Physics, University of São Paulo, São Carlos 13566-590, Brazil.
  • Gusso SL; Graduate Program in Physics and Astronomy, Federal University of Technology-Paraná, Curitiba 80230-901, Brazil.
  • Macedo AG; Graduate Program in Physics and Astronomy, Federal University of Technology-Paraná, Curitiba 80230-901, Brazil.
  • Rodrigues PC; Graduate Program in Chemistry, Federal University of Technology-Paraná, Curitiba 81280-340, Brazil.
  • Mohd Yusoff ARB; Department of Physics, Vivian Tower, Singleton Park, Swansea SA2 8PP, UK.
  • Schneider FK; Graduate Program in Electrical and Computer Engineering, Federal University of Technology-Paraná, Curitiba 80230-901, Brazil.
  • Deus JF; Graduate Program in Physics and Astronomy, Federal University of Technology-Paraná, Curitiba 80230-901, Brazil.
  • José da Silva W; Graduate Program in Electrical and Computer Engineering, Federal University of Technology-Paraná, Curitiba 80230-901, Brazil.
Sensors (Basel) ; 21(15)2021 Jul 21.
Article em En | MEDLINE | ID: mdl-34372184
This work reports on a reduced graphene oxide and poly(aniline) composite (rGO-PANI), with rGO clusters inserted between PANI chains. These clusters were formed due the plasticizing effect of N-methyl-2-pyrrolidone (NMP) solvent, which was added during the synthesis. Further, this composite was processed as thin film onto an interdigitated electrode array and used as the sensitive layer for ammonia gas, presenting sensitivity of 250% at 100 ppm, a response time of 97 s, and a lowest detection limit of 5 ppm. The PANI deprotonation process, upon exposure to NH3, rGO, also contributed by improving the sensitivity due its higher surface area and the presence of carboxylic acids. This allowed for the interaction between the hydrogen of NH3 (nucleophilic character) and the -COOH groups (electrophilic character) from the rGO surface, thereby introducing a promising sensing composite for amine-based gases.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Grafite Tipo de estudo: Diagnostic_studies Idioma: En Revista: Sensors (Basel) Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Brasil País de publicação: Suíça
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Grafite Tipo de estudo: Diagnostic_studies Idioma: En Revista: Sensors (Basel) Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Brasil País de publicação: Suíça