Impact of reducing agents on the ammonia sensing performance of silver decorated reduced graphene oxide: Experiment and first principles calculations

Sivalingam Muthu Mariappan, Mathan Kumar Eswaran, Udo Schwingenschlögl, Tharmar Thangeeswari, Elangovan Vinoth, Mohd Shkir, Zafar Said, Balasubramanian Karthikeyan

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

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.
Original languageEnglish (US)
Pages (from-to)149886
JournalApplied Surface Science
Volume558
DOIs
StatePublished - Apr 25 2021

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

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