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

Sivalingam Muthu Mariappan; Mathan K. Eswaran; Udo Schwingenschlögl; Tharmar Thangeeswari; Elangovan Vinoth; Mohd Shkir; Zafar Said; Balasubramanian Karthikeyan

doi:10.1016/j.apsusc.2021.149886

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

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

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

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 language	English
Article number	149886
Journal	Applied Surface Science
Volume	558
DOIs	https://doi.org/10.1016/j.apsusc.2021.149886
Publication status	Published - Aug 30 2021
Externally published	Yes

Keywords

Ammonia
Reduced graphene oxide.
Sensor
Silver nanoparticle

ASJC Scopus subject areas

Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films

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10.1016/j.apsusc.2021.149886

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Mariappan, S. M., Eswaran, M. K., Schwingenschlögl, U., Thangeeswari, T., Vinoth, E., Shkir, M., Said, Z., & Karthikeyan, B. (2021). Impact of reducing agents on the ammonia sensing performance of silver decorated reduced graphene oxide: Experiment and first principles calculations. Applied Surface Science, 558, Article 149886. https://doi.org/10.1016/j.apsusc.2021.149886

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

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.",

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T1 - Impact of reducing agents on the ammonia sensing performance of silver decorated reduced graphene oxide

T2 - Experiment and first principles calculations

AU - Mariappan, Sivalingam Muthu

AU - Eswaran, Mathan K.

AU - Schwingenschlögl, Udo

AU - Thangeeswari, Tharmar

AU - Vinoth, Elangovan

AU - Shkir, Mohd

AU - Said, Zafar

AU - Karthikeyan, Balasubramanian

PY - 2021/8/30

Y1 - 2021/8/30

N2 - 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.

AB - 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.

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KW - Reduced graphene oxide.

KW - Sensor

KW - Silver nanoparticle

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JO - Applied Surface Science

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

Abstract

Keywords

ASJC Scopus subject areas

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