Effect of the carbon loading on the structural and photocatalytic properties of reduced graphene oxide-TiO2 nanocomposites prepared by hydrothermal synthesis
| Autor(a) principal: | |
|---|---|
| Data de Publicação: | 2019 |
| Outros Autores: | , , , , , , , , , |
| Tipo de documento: | Artigo |
| Idioma: | eng |
| Título da fonte: | Repositório Institucional da UFMG |
| Texto Completo: | https://doi.org/10.1016/j.jmrt.2019.10.020 http://hdl.handle.net/1843/46908 https://orcid.org/0000-0002-1543-5416 https://orcid.org/0000-0001-6813-2999 https://orcid.org/0000-0001-6437-0009 https://orcid.org/0000-0002-0308-0179 https://orcid.org/0000-0002-0873-1671 https://orcid.org/0000-0002-7562-0285 https://orcid.org/0000-0002-6357-9553 |
Resumo: | CNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico |
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2022-11-04T12:54:46Z2022-11-04T12:54:46Z20198662626274https://doi.org/10.1016/j.jmrt.2019.10.02022387854http://hdl.handle.net/1843/46908https://orcid.org/0000-0002-1543-5416https://orcid.org/0000-0001-6813-2999https://orcid.org/0000-0001-6437-0009https://orcid.org/0000-0002-0308-0179https://orcid.org/0000-0002-0873-1671https://orcid.org/0000-0002-7562-0285https://orcid.org/0000-0002-6357-9553CNPq - Conselho Nacional de Desenvolvimento Científico e TecnológicoFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas GeraisCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível SuperiorINCT – Instituto nacional de ciência e tecnologia (Antigo Instituto do Milênio)This work deals with the preparation of reduced graphene oxide (RGO)-TiO2 composites by a one-step hydrothermal treatment. The effect of the RGO loading on both the structural properties and photocatalytic behavior of RGO-TiO2 is deeply addressed herein. The hydrothermal treatment promoted the reduction of graphene oxide, crystallization of TiO2 into anatase, and anchoring of TiO2 nanoparticles on RGO sheets. It was observed that the prepared anatase particles showed sizes below 10 nm, whereas the RGO sheets displayed thicknesses smaller than 1 nm. The use of RGO at concentrations up to 15 wt% greatly increased the specific surface area of RGO-TiO2. It was demonstrated that the combination of RGO and TiO2 gives rise to materials with improved photocatalytic properties and tailored structural properties. The composite with the highest photoactivity was the one containing an RGO loading of 1 wt%; this composite displayed a photocatalytic rate constant about 9.5 times higher than that evaluated for pure TiO2. This behavior may be related to the stacking of RGO nanosheets when its concentration is above 1 wt%. Moreover, the addition of RGO in excess may prevent the activation of the TiO2 surface by UV light and also decrease the lifetime of the photogenerated electron-hole pairs. Therefore, it appears that 1 wt% is the optimal loading of RGO to obtain a close interfacial contact between RGO and TiO2, leading to both an effective activation of TiO2 by UV radiation and an enhanced charge transfer between RGO and TiO2.engUniversidade Federal de Minas GeraisUFMGBrasilENG - DEPARTAMENTO DE ENGENHARIA METALÚRGICAENG - DEPARTAMENTO DE ENGENHARIA QUÍMICAICX - DEPARTAMENTO DE FÍSICAICX - DEPARTAMENTO DE QUÍMICAJournal of Materials Research and Technology - JMR & TGrafenoÓxido de grafenoDióxido de titânioReduced graphene oxideTin dioxideTitaniaSol-gel processPhotocatalytic evaluationEffect of the carbon loading on the structural and photocatalytic properties of reduced graphene oxide-TiO2 nanocomposites prepared by hydrothermal synthesisinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttps://www.sciencedirect.com/science/article/pii/S2238785419302613#!Bruno de Souza GonçalvesManuel Noel Paul Georges HoumardEduardo Henrique Martins NunesHugo Guimarães PalharesTarcizo da Cruz Costa de SouzaVinícius Gomide de CastroGlaura Goulart SilvaBruno Cordeiro SilvaKlaus Wilhelm Heinrich KrambrockRenata Braga SoaresVanessa de Freitas Cunha Linsapplication/pdfinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFMGinstname:Universidade Federal de Minas Gerais (UFMG)instacron:UFMGLICENSELicense.txtLicense.txttext/plain; charset=utf-82042https://repositorio.ufmg.br/bitstream/1843/46908/1/License.txtfa505098d172de0bc8864fc1287ffe22MD51ORIGINALEffect of the carbon loading on the structural and.pdfEffect of the carbon loading on the structural and.pdfapplication/pdf3662302https://repositorio.ufmg.br/bitstream/1843/46908/2/Effect%20of%20the%20carbon%20loading%20on%20the%20structural%20and.pdfac68bd3f1d62be4a5702935c286dc6d4MD521843/469082022-11-04 09:54:46.964oai:repositorio.ufmg.br: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Repositório de PublicaçõesPUBhttps://repositorio.ufmg.br/oaiopendoar:2022-11-04T12:54:46Repositório Institucional da UFMG - Universidade Federal de Minas Gerais (UFMG)false |
| dc.title.pt_BR.fl_str_mv |
Effect of the carbon loading on the structural and photocatalytic properties of reduced graphene oxide-TiO2 nanocomposites prepared by hydrothermal synthesis |
| title |
Effect of the carbon loading on the structural and photocatalytic properties of reduced graphene oxide-TiO2 nanocomposites prepared by hydrothermal synthesis |
| spellingShingle |
Effect of the carbon loading on the structural and photocatalytic properties of reduced graphene oxide-TiO2 nanocomposites prepared by hydrothermal synthesis Bruno de Souza Gonçalves Reduced graphene oxide Tin dioxide Titania Sol-gel process Photocatalytic evaluation Grafeno Óxido de grafeno Dióxido de titânio |
| title_short |
Effect of the carbon loading on the structural and photocatalytic properties of reduced graphene oxide-TiO2 nanocomposites prepared by hydrothermal synthesis |
| title_full |
Effect of the carbon loading on the structural and photocatalytic properties of reduced graphene oxide-TiO2 nanocomposites prepared by hydrothermal synthesis |
| title_fullStr |
Effect of the carbon loading on the structural and photocatalytic properties of reduced graphene oxide-TiO2 nanocomposites prepared by hydrothermal synthesis |
| title_full_unstemmed |
Effect of the carbon loading on the structural and photocatalytic properties of reduced graphene oxide-TiO2 nanocomposites prepared by hydrothermal synthesis |
| title_sort |
Effect of the carbon loading on the structural and photocatalytic properties of reduced graphene oxide-TiO2 nanocomposites prepared by hydrothermal synthesis |
| author |
Bruno de Souza Gonçalves |
| author_facet |
Bruno de Souza Gonçalves Manuel Noel Paul Georges Houmard Eduardo Henrique Martins Nunes Hugo Guimarães Palhares Tarcizo da Cruz Costa de Souza Vinícius Gomide de Castro Glaura Goulart Silva Bruno Cordeiro Silva Klaus Wilhelm Heinrich Krambrock Renata Braga Soares Vanessa de Freitas Cunha Lins |
| author_role |
author |
| author2 |
Manuel Noel Paul Georges Houmard Eduardo Henrique Martins Nunes Hugo Guimarães Palhares Tarcizo da Cruz Costa de Souza Vinícius Gomide de Castro Glaura Goulart Silva Bruno Cordeiro Silva Klaus Wilhelm Heinrich Krambrock Renata Braga Soares Vanessa de Freitas Cunha Lins |
| author2_role |
author author author author author author author author author author |
| dc.contributor.author.fl_str_mv |
Bruno de Souza Gonçalves Manuel Noel Paul Georges Houmard Eduardo Henrique Martins Nunes Hugo Guimarães Palhares Tarcizo da Cruz Costa de Souza Vinícius Gomide de Castro Glaura Goulart Silva Bruno Cordeiro Silva Klaus Wilhelm Heinrich Krambrock Renata Braga Soares Vanessa de Freitas Cunha Lins |
| dc.subject.por.fl_str_mv |
Reduced graphene oxide Tin dioxide Titania Sol-gel process Photocatalytic evaluation |
| topic |
Reduced graphene oxide Tin dioxide Titania Sol-gel process Photocatalytic evaluation Grafeno Óxido de grafeno Dióxido de titânio |
| dc.subject.other.pt_BR.fl_str_mv |
Grafeno Óxido de grafeno Dióxido de titânio |
| description |
CNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico |
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2019 |
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2019 |
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2022-11-04T12:54:46Z |
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2022-11-04T12:54:46Z |
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info:eu-repo/semantics/publishedVersion |
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info:eu-repo/semantics/article |
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article |
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publishedVersion |
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http://hdl.handle.net/1843/46908 |
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https://doi.org/10.1016/j.jmrt.2019.10.020 |
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22387854 |
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https://orcid.org/0000-0002-1543-5416 https://orcid.org/0000-0001-6813-2999 https://orcid.org/0000-0001-6437-0009 https://orcid.org/0000-0002-0308-0179 https://orcid.org/0000-0002-0873-1671 https://orcid.org/0000-0002-7562-0285 https://orcid.org/0000-0002-6357-9553 |
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https://doi.org/10.1016/j.jmrt.2019.10.020 http://hdl.handle.net/1843/46908 https://orcid.org/0000-0002-1543-5416 https://orcid.org/0000-0001-6813-2999 https://orcid.org/0000-0001-6437-0009 https://orcid.org/0000-0002-0308-0179 https://orcid.org/0000-0002-0873-1671 https://orcid.org/0000-0002-7562-0285 https://orcid.org/0000-0002-6357-9553 |
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22387854 |
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eng |
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eng |
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Journal of Materials Research and Technology - JMR & T |
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info:eu-repo/semantics/openAccess |
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openAccess |
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Universidade Federal de Minas Gerais |
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UFMG |
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Brasil |
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ENG - DEPARTAMENTO DE ENGENHARIA METALÚRGICA ENG - DEPARTAMENTO DE ENGENHARIA QUÍMICA ICX - DEPARTAMENTO DE FÍSICA ICX - DEPARTAMENTO DE QUÍMICA |
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Universidade Federal de Minas Gerais |
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