Fabrication of reduced graphene oxide with high electrical conductivity by thermal-assisted photoreduction of electrochemically-exfoliated graphene oxide
Electrochemical exfoliation of graphite is a method for synthesizing graphene oxide (GO) with fewer structural defects than GO synthesized by conventional chemical oxidation. Photoreduction of GO has been focused on due to their facile procedures, and environmental friendliness. In this report, elec...
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| Veröffentlicht in: | Japanese Journal of Applied Physics 2022-09, Vol.61 (SL), p.SL1012 |
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| container_issue | SL |
| container_start_page | SL1012 |
| container_title | Japanese Journal of Applied Physics |
| container_volume | 61 |
| creator | Hirotomi, Yuji Kubota, Wataru Utsunomiya, Toru Ichii, Takashi Sugimura, Hiroyuki |
| description | Electrochemical exfoliation of graphite is a method for synthesizing graphene oxide (GO) with fewer structural defects than GO synthesized by conventional chemical oxidation. Photoreduction of GO has been focused on due to their facile procedures, and environmental friendliness. In this report, electrochemically-exfoliated graphene oxide (EGO) was irradiated by vacuum ultraviolet (VUV) light at 140 °C under a high vacuum environment, named thermal-assisted VUV light treatment. Conductive atomic force microscopy was used to investigate the electrical characteristics of individual sheets on the nanometer scale. The electrical conductivity of the treated sheet (1.4 × 10
5
S m
−1
) was higher than the pristine EGO by an order of magnitude. The chemical and structural analysis showed that the EGO was reduced and their
π
-conjugated domains were restored through a hybrid of photochemical and thermal treatment. These results indicate that our hybrid approach has the potential for reducing the EGO. |
| doi_str_mv | 10.35848/1347-4065/ac66c0 |
| format | Article |
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5
S m
−1
) was higher than the pristine EGO by an order of magnitude. The chemical and structural analysis showed that the EGO was reduced and their
π
-conjugated domains were restored through a hybrid of photochemical and thermal treatment. These results indicate that our hybrid approach has the potential for reducing the EGO.</description><identifier>ISSN: 0021-4922</identifier><identifier>EISSN: 1347-4065</identifier><identifier>DOI: 10.35848/1347-4065/ac66c0</identifier><identifier>CODEN: JJAPB6</identifier><language>eng</language><publisher>Tokyo: IOP Publishing</publisher><subject>Atomic force microscopy ; Chemical synthesis ; conductive atomic force microscopy ; Electrical resistivity ; electrochemical exfoliation ; Exfoliation ; Graphene ; graphene oxide ; Heat treatment ; High vacuum ; Oxidation ; photoreduction ; Structural analysis ; thermal reduction</subject><ispartof>Japanese Journal of Applied Physics, 2022-09, Vol.61 (SL), p.SL1012</ispartof><rights>2022 The Japan Society of Applied Physics</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c464t-6859be7cc9c40d3f2fb1e85134804fec3a3de44d6425a1ceeb25241fc2c07d7a3</citedby><cites>FETCH-LOGICAL-c464t-6859be7cc9c40d3f2fb1e85134804fec3a3de44d6425a1ceeb25241fc2c07d7a3</cites><orcidid>0000-0002-0023-7812 ; 0000-0002-4021-8894</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://iopscience.iop.org/article/10.35848/1347-4065/ac66c0/pdf$$EPDF$$P50$$Giop$$H</linktopdf><link.rule.ids>314,778,782,27907,27908,53829,53876</link.rule.ids></links><search><creatorcontrib>Hirotomi, Yuji</creatorcontrib><creatorcontrib>Kubota, Wataru</creatorcontrib><creatorcontrib>Utsunomiya, Toru</creatorcontrib><creatorcontrib>Ichii, Takashi</creatorcontrib><creatorcontrib>Sugimura, Hiroyuki</creatorcontrib><title>Fabrication of reduced graphene oxide with high electrical conductivity by thermal-assisted photoreduction of electrochemically-exfoliated graphene oxide</title><title>Japanese Journal of Applied Physics</title><addtitle>Jpn. J. Appl. Phys</addtitle><description>Electrochemical exfoliation of graphite is a method for synthesizing graphene oxide (GO) with fewer structural defects than GO synthesized by conventional chemical oxidation. Photoreduction of GO has been focused on due to their facile procedures, and environmental friendliness. In this report, electrochemically-exfoliated graphene oxide (EGO) was irradiated by vacuum ultraviolet (VUV) light at 140 °C under a high vacuum environment, named thermal-assisted VUV light treatment. Conductive atomic force microscopy was used to investigate the electrical characteristics of individual sheets on the nanometer scale. The electrical conductivity of the treated sheet (1.4 × 10
5
S m
−1
) was higher than the pristine EGO by an order of magnitude. The chemical and structural analysis showed that the EGO was reduced and their
π
-conjugated domains were restored through a hybrid of photochemical and thermal treatment. These results indicate that our hybrid approach has the potential for reducing the EGO.</description><subject>Atomic force microscopy</subject><subject>Chemical synthesis</subject><subject>conductive atomic force microscopy</subject><subject>Electrical resistivity</subject><subject>electrochemical exfoliation</subject><subject>Exfoliation</subject><subject>Graphene</subject><subject>graphene oxide</subject><subject>Heat treatment</subject><subject>High vacuum</subject><subject>Oxidation</subject><subject>photoreduction</subject><subject>Structural analysis</subject><subject>thermal reduction</subject><issn>0021-4922</issn><issn>1347-4065</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><recordid>eNp1kU1OwzAQhS0EEqVwAHaWWIfaju2kS1RRQKrEBtaW40waV2kcbBfoUbgtScPPArEazei9bzRvELqk5DoVOc9nNOVZwokUM22kNOQITX5Gx2hCCKMJnzN2is5C2PStFJxO0MdSF94aHa1rsauwh3JnoMRrr7saWsDu3ZaA32yscW3XNYYGTBwcDTau7cXRvtq4x8Uexxr8VjeJDsGG2EO62kV3IH7jR7czNWwHRLNP4L1yjdXxz85zdFLpJsDFV52i5-Xt0-I-WT3ePSxuVonhksdE5mJeQGbM3HBSphWrCgq56G_PCa_ApDotgfNSciY0NQAFE4zTyjBDsjLT6RRdjdzOu5cdhKg2bufbfqViMicpzYSQvYqOKuNdCB4q1Xm71X6vKFGHD6ghbjXErcYP9J5k9FjX_UL_138ChBmMmg</recordid><startdate>20220901</startdate><enddate>20220901</enddate><creator>Hirotomi, Yuji</creator><creator>Kubota, Wataru</creator><creator>Utsunomiya, Toru</creator><creator>Ichii, Takashi</creator><creator>Sugimura, Hiroyuki</creator><general>IOP Publishing</general><general>Japanese Journal of Applied Physics</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7U5</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0002-0023-7812</orcidid><orcidid>https://orcid.org/0000-0002-4021-8894</orcidid></search><sort><creationdate>20220901</creationdate><title>Fabrication of reduced graphene oxide with high electrical conductivity by thermal-assisted photoreduction of electrochemically-exfoliated graphene oxide</title><author>Hirotomi, Yuji ; Kubota, Wataru ; Utsunomiya, Toru ; Ichii, Takashi ; Sugimura, Hiroyuki</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c464t-6859be7cc9c40d3f2fb1e85134804fec3a3de44d6425a1ceeb25241fc2c07d7a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Atomic force microscopy</topic><topic>Chemical synthesis</topic><topic>conductive atomic force microscopy</topic><topic>Electrical resistivity</topic><topic>electrochemical exfoliation</topic><topic>Exfoliation</topic><topic>Graphene</topic><topic>graphene oxide</topic><topic>Heat treatment</topic><topic>High vacuum</topic><topic>Oxidation</topic><topic>photoreduction</topic><topic>Structural analysis</topic><topic>thermal reduction</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hirotomi, Yuji</creatorcontrib><creatorcontrib>Kubota, Wataru</creatorcontrib><creatorcontrib>Utsunomiya, Toru</creatorcontrib><creatorcontrib>Ichii, Takashi</creatorcontrib><creatorcontrib>Sugimura, Hiroyuki</creatorcontrib><collection>CrossRef</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Japanese Journal of Applied Physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Hirotomi, Yuji</au><au>Kubota, Wataru</au><au>Utsunomiya, Toru</au><au>Ichii, Takashi</au><au>Sugimura, Hiroyuki</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Fabrication of reduced graphene oxide with high electrical conductivity by thermal-assisted photoreduction of electrochemically-exfoliated graphene oxide</atitle><jtitle>Japanese Journal of Applied Physics</jtitle><addtitle>Jpn. J. Appl. Phys</addtitle><date>2022-09-01</date><risdate>2022</risdate><volume>61</volume><issue>SL</issue><spage>SL1012</spage><pages>SL1012-</pages><issn>0021-4922</issn><eissn>1347-4065</eissn><coden>JJAPB6</coden><abstract>Electrochemical exfoliation of graphite is a method for synthesizing graphene oxide (GO) with fewer structural defects than GO synthesized by conventional chemical oxidation. Photoreduction of GO has been focused on due to their facile procedures, and environmental friendliness. In this report, electrochemically-exfoliated graphene oxide (EGO) was irradiated by vacuum ultraviolet (VUV) light at 140 °C under a high vacuum environment, named thermal-assisted VUV light treatment. Conductive atomic force microscopy was used to investigate the electrical characteristics of individual sheets on the nanometer scale. The electrical conductivity of the treated sheet (1.4 × 10
5
S m
−1
) was higher than the pristine EGO by an order of magnitude. The chemical and structural analysis showed that the EGO was reduced and their
π
-conjugated domains were restored through a hybrid of photochemical and thermal treatment. These results indicate that our hybrid approach has the potential for reducing the EGO.</abstract><cop>Tokyo</cop><pub>IOP Publishing</pub><doi>10.35848/1347-4065/ac66c0</doi><tpages>6</tpages><orcidid>https://orcid.org/0000-0002-0023-7812</orcidid><orcidid>https://orcid.org/0000-0002-4021-8894</orcidid><oa>free_for_read</oa></addata></record> |
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| language | eng |
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| source | IOP Publishing Journals; Institute of Physics (IOP) Journals - HEAL-Link |
| subjects | Atomic force microscopy Chemical synthesis conductive atomic force microscopy Electrical resistivity electrochemical exfoliation Exfoliation Graphene graphene oxide Heat treatment High vacuum Oxidation photoreduction Structural analysis thermal reduction |
| title | Fabrication of reduced graphene oxide with high electrical conductivity by thermal-assisted photoreduction of electrochemically-exfoliated graphene oxide |
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