Influence of Deposition Temperature as a Reducing Agent on Synthesis of Reduced Graphene Oxide (RGO) Nanosheets
In this paper we have investigated the physical properties of reduced graphene oxide (RGO) thin films prepared at various substrate temperatures of 230, 260, 290, 320 and 350 oC using spray pyrolysis technique. We have compared these films from various viewpoints, including structural, morphological...
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| Format: | Article |
| Language: | English |
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Iran University of Science & Technology
2019-03-01
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| Series: | Iranian Journal of Materials Science and Engineering |
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| Online Access: | http://ijmse.iust.ac.ir/browse.php?a_code=A-10-1648-1&slc_lang=en&sid=1 |
| _version_ | 1811295169087012864 |
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| author | H. Darrudi M. Adelifard |
| author_facet | H. Darrudi M. Adelifard |
| author_sort | H. Darrudi |
| collection | DOAJ |
| description | In this paper we have investigated the physical properties of reduced graphene oxide (RGO) thin films prepared at various substrate temperatures of 230, 260, 290, 320 and 350 oC using spray pyrolysis technique. We have compared these films from various viewpoints, including structural, morphological, optical, electrical and thermos-electrical properties. XRD analysis showed a phase shift from graphene oxide (GO) to RGO due to elevate the substrate temperature from 200 oC to higher temperatures. FESEM images of RGO thin films reveal that a stacked image of irregular and folding nanosheets, and rod-like features at temperatures below and above 290 oC; respectively. Optical studies showed that the layers have a relatively high absorption coefficient (∼0.8×104 to 1.7×104 cm−1) in the visible range, with an optical band gap of 1.67–1.88 eV. The Hall effect data showed that all samples have a p-type conductivity with a hole concentration of ∼1015 cm−3, and sheet resistance values of about 106 Ω/sq, in agreement with previous reports. The thermoelectric measurements revealed that with increasing applied temperature gradient between the two ends of the samples, the thermoelectric electromotive force (emf) of the prepared RGO thin films increases. |
| first_indexed | 2024-04-13T05:29:21Z |
| format | Article |
| id | doaj.art-57f5ec33e18b4a728489b70b31129ef2 |
| institution | Directory Open Access Journal |
| issn | 1735-0808 2383-3882 |
| language | English |
| last_indexed | 2024-04-13T05:29:21Z |
| publishDate | 2019-03-01 |
| publisher | Iran University of Science & Technology |
| record_format | Article |
| series | Iranian Journal of Materials Science and Engineering |
| spelling | doaj.art-57f5ec33e18b4a728489b70b31129ef22022-12-22T03:00:30ZengIran University of Science & TechnologyIranian Journal of Materials Science and Engineering1735-08082383-38822019-03-011612228Influence of Deposition Temperature as a Reducing Agent on Synthesis of Reduced Graphene Oxide (RGO) NanosheetsH. Darrudi0M. Adelifard1 School of Physics, Damghan University School of Physics, Damghan University In this paper we have investigated the physical properties of reduced graphene oxide (RGO) thin films prepared at various substrate temperatures of 230, 260, 290, 320 and 350 oC using spray pyrolysis technique. We have compared these films from various viewpoints, including structural, morphological, optical, electrical and thermos-electrical properties. XRD analysis showed a phase shift from graphene oxide (GO) to RGO due to elevate the substrate temperature from 200 oC to higher temperatures. FESEM images of RGO thin films reveal that a stacked image of irregular and folding nanosheets, and rod-like features at temperatures below and above 290 oC; respectively. Optical studies showed that the layers have a relatively high absorption coefficient (∼0.8×104 to 1.7×104 cm−1) in the visible range, with an optical band gap of 1.67–1.88 eV. The Hall effect data showed that all samples have a p-type conductivity with a hole concentration of ∼1015 cm−3, and sheet resistance values of about 106 Ω/sq, in agreement with previous reports. The thermoelectric measurements revealed that with increasing applied temperature gradient between the two ends of the samples, the thermoelectric electromotive force (emf) of the prepared RGO thin films increases.http://ijmse.iust.ac.ir/browse.php?a_code=A-10-1648-1&slc_lang=en&sid=1Reduced graphene oxide (RGO)NanosheetsOptical propertiesElectrical properties |
| spellingShingle | H. Darrudi M. Adelifard Influence of Deposition Temperature as a Reducing Agent on Synthesis of Reduced Graphene Oxide (RGO) Nanosheets Iranian Journal of Materials Science and Engineering Reduced graphene oxide (RGO) Nanosheets Optical properties Electrical properties |
| title | Influence of Deposition Temperature as a Reducing Agent on Synthesis of Reduced Graphene Oxide (RGO) Nanosheets |
| title_full | Influence of Deposition Temperature as a Reducing Agent on Synthesis of Reduced Graphene Oxide (RGO) Nanosheets |
| title_fullStr | Influence of Deposition Temperature as a Reducing Agent on Synthesis of Reduced Graphene Oxide (RGO) Nanosheets |
| title_full_unstemmed | Influence of Deposition Temperature as a Reducing Agent on Synthesis of Reduced Graphene Oxide (RGO) Nanosheets |
| title_short | Influence of Deposition Temperature as a Reducing Agent on Synthesis of Reduced Graphene Oxide (RGO) Nanosheets |
| title_sort | influence of deposition temperature as a reducing agent on synthesis of reduced graphene oxide rgo nanosheets |
| topic | Reduced graphene oxide (RGO) Nanosheets Optical properties Electrical properties |
| url | http://ijmse.iust.ac.ir/browse.php?a_code=A-10-1648-1&slc_lang=en&sid=1 |
| work_keys_str_mv | AT hdarrudi influenceofdepositiontemperatureasareducingagentonsynthesisofreducedgrapheneoxidergonanosheets AT madelifard influenceofdepositiontemperatureasareducingagentonsynthesisofreducedgrapheneoxidergonanosheets |