We investigate economic room temperature sensors for toxic ammonia molecules (NH3) based on reduced graphene oxide decorated with silver nanoparticles (Ag:rGO) to provide a systematic understanding of the role played by the employed reducing agent. To this aim, we perform a comparative study of the sensing performance for a set of reducing agents, using a combination of experimental and theoretical methods. Specifically, Ag:rGO prepared with the reducing agents glucose, vitamin C, and sodium borohydride (NaBH4) is studied experimentally by the chemi-resistive method and is modelled theoretically by first-principles calculations. NaBH4 turns out to be an effective reducing agent due to favourable charge transfer kinetics by band bending.
Bibliographical noteKAUST Repository Item: Exported on 2021-06-15
Acknowledgements: The research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST). The authors extend their appreciation to the Deanship of Scientific Research at King Khalid University for funding this work through general research project under Grant No. G.R.P/21/42.
ASJC Scopus subject areas
- Surfaces, Coatings and Films