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Registro Completo |
Biblioteca(s): |
Embrapa Instrumentação. |
Data corrente: |
24/03/2022 |
Data da última atualização: |
24/03/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
TORRES, J. A.; CRUZ, J. C. da; NOGUEIRA, A. E.; SILVA, G. T. S. T. da; OLIVEIRA, J. de; RIBEIRO, C. |
Afiliação: |
CAUE RIBEIRO DE OLIVEIRA, CNPDIA. |
Título: |
Role of Cu0 -TiO2 interaction in catalyst stability in CO2 photoreduction process. |
Ano de publicação: |
2022 |
Fonte/Imprenta: |
Journal of Environmental Chemical Engineering, v. 10, 107291, 2022. |
ISSN: |
2213-3437 |
DOI: |
https://doi.org/10.1016/j.jece.2022.107291 |
Idioma: |
Inglês |
Conteúdo: |
The application of copper-based semiconductors for CO2 photoreduction has been limited by the poor stability of these catalysts in aqueous solutions due to parallel oxidation reactions. Thus, here we discussed the role of the Cu0 -TiO2 interaction in catalyst stability, where the semiconductor acts as a charge separator and support for Cu0 . Cu0 nanoparticles were deposited on the surface of TiO2 by reducing copper nitrate using a sodium borohydride solution. The metallic copper presents a higher selectivity in CO production (82.32%), while pure iO2 presents a selectivity for CH4 (62.44%). However, with the heterostructure formation, the photocatalysts activity increases and the selectivity changes with copper amount variation over TiO2. In addition to the obtained C1 products (CH4, CO, and CH3OH), products containing two or more carbons (C2+) were also generated, such as acetic acid (C2H4O2), acetone (C3H6O), and isopropanol (C3H8O). H2 was also produced, although the selectivity for products derived from the photoreduction of CO2 was significantly greater. The sample TiO2/Cu 30% was significantly stable, which indicated the importance of an adequate heterojunction in the catalyst activity. These results demonstrate the synergistic effect between different copper species over TiO2, in which both materials play a role in the catalytic event. |
Palavras-Chave: |
Heterostructure; Selectivity; Stability. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02096naa a2200241 a 4500 001 2141233 005 2022-03-24 008 2022 bl uuuu u00u1 u #d 022 $a2213-3437 024 7 $ahttps://doi.org/10.1016/j.jece.2022.107291$2DOI 100 1 $aTORRES, J. A. 245 $aRole of Cu0 -TiO2 interaction in catalyst stability in CO2 photoreduction process.$h[electronic resource] 260 $c2022 520 $aThe application of copper-based semiconductors for CO2 photoreduction has been limited by the poor stability of these catalysts in aqueous solutions due to parallel oxidation reactions. Thus, here we discussed the role of the Cu0 -TiO2 interaction in catalyst stability, where the semiconductor acts as a charge separator and support for Cu0 . Cu0 nanoparticles were deposited on the surface of TiO2 by reducing copper nitrate using a sodium borohydride solution. The metallic copper presents a higher selectivity in CO production (82.32%), while pure iO2 presents a selectivity for CH4 (62.44%). However, with the heterostructure formation, the photocatalysts activity increases and the selectivity changes with copper amount variation over TiO2. In addition to the obtained C1 products (CH4, CO, and CH3OH), products containing two or more carbons (C2+) were also generated, such as acetic acid (C2H4O2), acetone (C3H6O), and isopropanol (C3H8O). H2 was also produced, although the selectivity for products derived from the photoreduction of CO2 was significantly greater. The sample TiO2/Cu 30% was significantly stable, which indicated the importance of an adequate heterojunction in the catalyst activity. These results demonstrate the synergistic effect between different copper species over TiO2, in which both materials play a role in the catalytic event. 653 $aHeterostructure 653 $aSelectivity 653 $aStability 700 1 $aCRUZ, J. C. da 700 1 $aNOGUEIRA, A. E. 700 1 $aSILVA, G. T. S. T. da 700 1 $aOLIVEIRA, J. de 700 1 $aRIBEIRO, C. 773 $tJournal of Environmental Chemical Engineering$gv. 10, 107291, 2022.
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Embrapa Instrumentação (CNPDIA) |
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Biblioteca(s): |
Embrapa Pantanal. |
Data corrente: |
05/03/2010 |
Data da última atualização: |
20/07/2017 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
B - 2 |
Autoria: |
SILVA, W. M.; ROCHE, K. F.; EILERS, V.; OLIVEIRA, M. D. de. |
Afiliação: |
William Marcos da Silva, UFMS; Kennedy Francis Roche, UFMS; Vivianne Eilers, UFMS; MARCIA DIVINA DE OLIVEIRA, CPAP. |
Título: |
Copepod (Crustacea) distribution in the freshwater and hyposaline lakes of the Pantanal of Nhecolandia (Mato Grosso do Sul, Brazil). |
Ano de publicação: |
2009 |
Fonte/Imprenta: |
Acta Limnologica Brasiliensia, v. 21, n. 3, p. 327-331, 2009. |
Idioma: |
Português |
Conteúdo: |
Eighteen freshwater and hyposaline lakes of the Nhecolândia floodplain were sampled in two periods, April/03 (beginning of dry period) and March/04 (end of wet period). Dezoito lagoas de água doce e de água hiposalina do Pantanal da Nhecolândia foram amostrados em dois períodos, abril/03 (início da seca) e março/04(fim da cheia). |
Palavras-Chave: |
floodplain; planície de inundação. |
Thesagro: |
Copepoda; Limnologia. |
Thesaurus NAL: |
limnology; Pantanal. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/105238/1/57229.pdf
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Marc: |
LEADER 01016naa a2200229 a 4500 001 1792684 005 2017-07-20 008 2009 bl uuuu u00u1 u #d 100 1 $aSILVA, W. M. 245 $aCopepod (Crustacea) distribution in the freshwater and hyposaline lakes of the Pantanal of Nhecolandia (Mato Grosso do Sul, Brazil). 260 $c2009 520 $aEighteen freshwater and hyposaline lakes of the Nhecolândia floodplain were sampled in two periods, April/03 (beginning of dry period) and March/04 (end of wet period). Dezoito lagoas de água doce e de água hiposalina do Pantanal da Nhecolândia foram amostrados em dois períodos, abril/03 (início da seca) e março/04(fim da cheia). 650 $alimnology 650 $aPantanal 650 $aCopepoda 650 $aLimnologia 653 $afloodplain 653 $aplanície de inundação 700 1 $aROCHE, K. F. 700 1 $aEILERS, V. 700 1 $aOLIVEIRA, M. D. de 773 $tActa Limnologica Brasiliensia$gv. 21, n. 3, p. 327-331, 2009.
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