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Novel Preparation of Reduced Graphene Oxide–Silver Complex using an Electrical Spark Discharge Method

This study used an electrical discharge machine (EDM) to perform an electrical spark discharge method (ESDM), which is a new approach for reducing graphene oxide (GO) at normal temperature and pressure, without using chemical substances. A silver (Ag) electrode generates high temperature and high en...

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Autores principales: Tseng, Kuo-Hsiung, Ku, Hsueh-Chien, Tien, Der-Chi, Stobinski, Leszek
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6669528/
https://www.ncbi.nlm.nih.gov/pubmed/31284501
http://dx.doi.org/10.3390/nano9070979
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author Tseng, Kuo-Hsiung
Ku, Hsueh-Chien
Tien, Der-Chi
Stobinski, Leszek
author_facet Tseng, Kuo-Hsiung
Ku, Hsueh-Chien
Tien, Der-Chi
Stobinski, Leszek
author_sort Tseng, Kuo-Hsiung
collection PubMed
description This study used an electrical discharge machine (EDM) to perform an electrical spark discharge method (ESDM), which is a new approach for reducing graphene oxide (GO) at normal temperature and pressure, without using chemical substances. A silver (Ag) electrode generates high temperature and high energy during gap discharge. Ag atoms and Ag nanoparticles (AgNP) are suspended in GO, and ionization generates charged Ag(+) ions in the Ag plasma with a strong reducing property, thereby carrying O away from GO. A large flake-like structure of GO was simultaneously pyrolyzed to a small flake-like structure of reduced graphene oxide (rGO). When Ag was used as an electrode, GO was reduced to rGO and the exfoliated AgNP surface was coated with rGO, thus forming an rGOAg complex. Consequently, suspensibility and dispersion were enhanced.
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spelling pubmed-66695282019-08-08 Novel Preparation of Reduced Graphene Oxide–Silver Complex using an Electrical Spark Discharge Method Tseng, Kuo-Hsiung Ku, Hsueh-Chien Tien, Der-Chi Stobinski, Leszek Nanomaterials (Basel) Article This study used an electrical discharge machine (EDM) to perform an electrical spark discharge method (ESDM), which is a new approach for reducing graphene oxide (GO) at normal temperature and pressure, without using chemical substances. A silver (Ag) electrode generates high temperature and high energy during gap discharge. Ag atoms and Ag nanoparticles (AgNP) are suspended in GO, and ionization generates charged Ag(+) ions in the Ag plasma with a strong reducing property, thereby carrying O away from GO. A large flake-like structure of GO was simultaneously pyrolyzed to a small flake-like structure of reduced graphene oxide (rGO). When Ag was used as an electrode, GO was reduced to rGO and the exfoliated AgNP surface was coated with rGO, thus forming an rGOAg complex. Consequently, suspensibility and dispersion were enhanced. MDPI 2019-07-05 /pmc/articles/PMC6669528/ /pubmed/31284501 http://dx.doi.org/10.3390/nano9070979 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Tseng, Kuo-Hsiung
Ku, Hsueh-Chien
Tien, Der-Chi
Stobinski, Leszek
Novel Preparation of Reduced Graphene Oxide–Silver Complex using an Electrical Spark Discharge Method
title Novel Preparation of Reduced Graphene Oxide–Silver Complex using an Electrical Spark Discharge Method
title_full Novel Preparation of Reduced Graphene Oxide–Silver Complex using an Electrical Spark Discharge Method
title_fullStr Novel Preparation of Reduced Graphene Oxide–Silver Complex using an Electrical Spark Discharge Method
title_full_unstemmed Novel Preparation of Reduced Graphene Oxide–Silver Complex using an Electrical Spark Discharge Method
title_short Novel Preparation of Reduced Graphene Oxide–Silver Complex using an Electrical Spark Discharge Method
title_sort novel preparation of reduced graphene oxide–silver complex using an electrical spark discharge method
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6669528/
https://www.ncbi.nlm.nih.gov/pubmed/31284501
http://dx.doi.org/10.3390/nano9070979
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