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Article Dans Une Revue Surfaces Année : 2022

Tunning the Gas Sensing Properties of rGO with In2O3 Nanoparticles

Bruno de Lima
  • Fonction : Auteur
Amanda Komorizono
  • Fonction : Auteur
Amadou Ndiaye
Maria Inês B. Bernardi
  • Fonction : Auteur
Jerome Brunet
Valmor Mastelaro
  • Fonction : Auteur

Résumé

Here, we discuss the effect of In2O3 nanoparticles on the reduced graphene oxide (rGO) gas-sensing potentialities. In2O3 nanoparticles were prepared with the polymer precursors method, while the nanocomposites were prepared by mixing an In2O3 nanoparticle suspension with an rGO suspension in different proportions. The gas-sensing performance of our materials was tested by exposing our materials to known concentrations of a target toxic gas in a dry airflow. Our results demonstrate that In2O3 nanoparticles enhance the rGO sensitivity for strong oxidizing species such as O3 and NO2, while a negative effect on its sensitivity for NH3 sensing is observed. Furthermore, our measurements towards H2S suggest that the concentration of In2O3 nanoparticles can induce an uncommon transition from p-type to n-type semiconductor nature when rGO–In2O3 nanocomposites operate at temperatures close to 160 °C.

Domaines

Matériaux

Dates et versions

hal-03607544 , version 1 (14-03-2022)

Identifiants

Citer

Bruno de Lima, Amanda Komorizono, Amadou Ndiaye, Maria Inês B. Bernardi, Jerome Brunet, et al.. Tunning the Gas Sensing Properties of rGO with In2O3 Nanoparticles. Surfaces, 2022, 5 (1), pp.127-142. ⟨10.3390/surfaces5010006⟩. ⟨hal-03607544⟩
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