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 | Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
16/05/2024 |
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Data da última atualização: |
31/01/2025 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
NASCIMENTO, V. R. S.; TORRES, J. A.; IGA, G. D.; SANTOS, A. L. dos; EGUES, S. M.; GABRIEL FILHO, J. B.; FERREIRA, L. F. R.; RIBEIRO, C. |
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Afiliação: |
TIRADENTES UNIVERSITY INSTITUTE OF TECHNOLOGY AND RESEARCH; FEDERAL UNIVERSITY OF SÃO CARLOS (UFSCAR); CHEMISTRY, FEDERAL UNIVERSITY OF SÃO CARLOS (UFSCAR); SÃO PAULO UNIVERSITY; INSTITUTE OF TECHNOLOGY AND RESEARCH TIRADENTES UNIVERSITY; UNIVERSIDADE FEDERAL DE MINAS GERAIS; PROGRAM IN GENOMIC SCIENCES AND BIOTECHNOLOGY, CATHOLIC UNIVERSITY OF BRASÍLIA; CAUE RIBEIRO DE OLIVEIRA, CNPDIA. |
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Título: |
CO2 Photoreduction Product Selectivity with TiO2__Cu Nanocatalysts under Different Reaction Media. |
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Ano de publicação: |
2024 |
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Fonte/Imprenta: |
ChemCatChem, e202301612, 2024. |
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Páginas: |
1 - 12 |
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DOI: |
doi.org/10.1002/cctc.202301612 |
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Idioma: |
Inglês |
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Conteúdo: |
This study explores photocatalytic conversion of CO2 using TiO2__Cu heterojunctions with different Cu contents and investigates influence of different reaction media on the process efficiency. The use of KOH favored liquid products, especially ethanol. An analysis of H2 production as the main competitive reaction was done. Sodium oxalate led to an increase in H2 evolution by approximately 600 μmol g-1 compared to pure water, in the presence of CO2 in the reaction medium, but the blank test (without CO2) indicates a lower H2 yield (~136 μmol g-1), which suggests that the competitive reaction with CO2 also plays a role in H2 production. This role was related to the decrease of the initial pH from approximately 8.5 to 5.2, stabilizing at 5.5 at the end of the 6 h reaction. In an environment saturated with N2, the pH increases to 9 and stabilizes at 7.8 at the end of the process. In the presence of acetic acid, both CO and H2 production were suppressed, with a significant increase in the selectivity for methane via cleavage of the acid‘s carbon bond. The findings underscore the importance of optimizing reaction conditions to achieve higher yields of desired products in the photocatalytic conversion of .CO2. |
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Palavras-Chave: |
Energy crisis; Energy derived from fossil fuels. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01982naa a2200253 a 4500
001 2164305
005 2025-01-31
008 2024 bl uuuu u00u1 u #d
024 7 $adoi.org/10.1002/cctc.202301612$2DOI
100 1 $aNASCIMENTO, V. R. S.
245 $aCO2 Photoreduction Product Selectivity with TiO2__Cu Nanocatalysts under Different Reaction Media.$h[electronic resource]
260 $c2024
300 $a1 - 12
520 $aThis study explores photocatalytic conversion of CO2 using TiO2__Cu heterojunctions with different Cu contents and investigates influence of different reaction media on the process efficiency. The use of KOH favored liquid products, especially ethanol. An analysis of H2 production as the main competitive reaction was done. Sodium oxalate led to an increase in H2 evolution by approximately 600 μmol g-1 compared to pure water, in the presence of CO2 in the reaction medium, but the blank test (without CO2) indicates a lower H2 yield (~136 μmol g-1), which suggests that the competitive reaction with CO2 also plays a role in H2 production. This role was related to the decrease of the initial pH from approximately 8.5 to 5.2, stabilizing at 5.5 at the end of the 6 h reaction. In an environment saturated with N2, the pH increases to 9 and stabilizes at 7.8 at the end of the process. In the presence of acetic acid, both CO and H2 production were suppressed, with a significant increase in the selectivity for methane via cleavage of the acid‘s carbon bond. The findings underscore the importance of optimizing reaction conditions to achieve higher yields of desired products in the photocatalytic conversion of .CO2.
653 $aEnergy crisis
653 $aEnergy derived from fossil fuels
700 1 $aTORRES, J. A.
700 1 $aIGA, G. D.
700 1 $aSANTOS, A. L. dos
700 1 $aEGUES, S. M.
700 1 $aGABRIEL FILHO, J. B.
700 1 $aFERREIRA, L. F. R.
700 1 $aRIBEIRO, C.
773 $tChemCatChem, e202301612, 2024.
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| 1. |  | OJO, O.; GARCIA-AGUNDEZ, A.; GIRAULT, B.; HERNÁNDEZ, H.; CABANA, E.; GARCIA-GARCIA, A.; ARABSHAHI, P.; BAQUERO, C.; CASARI, P.; FERREIRA, E. J.; FREY, D.; GEORGIOU, C.; GOESSENS, M.; ISHCHENKO, A.; JIMÉNEZ, E.; KEBKAL, O.; LILLO, R.; MENEZES, R.; NICOLAOU, N.; ORTEGA, A.; PATRAS, P.; ROBERTS, J. C.; STAVRAKIS, E.; TANAKA, Y.; ANTA, A. F. CoronaSurveys: Using surveys with indirect reporting to estimate the incidence and evolution of epidemics. arXiv preprint arXiv:2005.12783, v. 2, 2020. 1 - 16| Tipo: Artigo em Periódico Indexado |
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