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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: |
26/04/2021 |
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Data da última atualização: |
10/06/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
OLIVEIRA, J. A.; TORRES, J. A.; GONÇALVES, R. V.; RIBEIRO, C.; NOGUEIRA, F. G. E.; RUOTOLO, L. A. M. |
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Afiliação: |
CAUE RIBEIRO DE OLIVEIRA, CNPDIA. |
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Título: |
Photocatalytic CO2 reduction over Nb2O5/basic bismuth nitrate nanocomposites. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Materials Research Bulletin, v. 133, a. 111073, 2021. |
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ISSN: |
0025-5408 |
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DOI: |
https://doi.org/10.1016/j.materresbull.2020.111073 |
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Idioma: |
Inglês |
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Conteúdo: |
In this work, CO2 was photocatalytic converted to valuable chemicals using photoactive basic bismuth nitrates (Bi6O(4+x)(OH)(4-x)(NO3)(6-x)).nH2O, x = 0–2, n = 0–3) and niobium pentoxide nanocomposites (BBN/Nb2O5). Milder hydrothermal synthesis (at 120 ◦C) maintained the crystal lattice of the BBN precursor (Bi6O5(OH)3(NO3)5.3H2O), while the synthesis carried out at 230 ◦C led to lamellar Bi2O2(OH)(NO3). Despite of the sample treated at 230 ◦C did not present the required band edge positions to reduce CO2, all the other materials were active for CO2 photoreduction. CO (~2.8 μmol g− 1 h− 1 ) was identified as the main product, followed by C2H4 (~0.1 μmol g− 1 h− 1 ), with the latter being favored using the nanocomposite produced at 120 ◦C. Scavenger experiments revealed that the photocatalytic mechanism is based on a Z-scheme, where molecules are oxidized in the valence band of Nb2O5 and CO2 is reduced in the conduction band of BBN. |
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Palavras-Chave: |
Catalytic properties; Chemical synthesis; Composites; Nanostructures. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01735naa a2200253 a 4500
001 2131513
005 2022-06-10
008 2021 bl uuuu u00u1 u #d
022 $a0025-5408
024 7 $ahttps://doi.org/10.1016/j.materresbull.2020.111073$2DOI
100 1 $aOLIVEIRA, J. A.
245 $aPhotocatalytic CO2 reduction over Nb2O5/basic bismuth nitrate nanocomposites.$h[electronic resource]
260 $c2021
520 $aIn this work, CO2 was photocatalytic converted to valuable chemicals using photoactive basic bismuth nitrates (Bi6O(4+x)(OH)(4-x)(NO3)(6-x)).nH2O, x = 0–2, n = 0–3) and niobium pentoxide nanocomposites (BBN/Nb2O5). Milder hydrothermal synthesis (at 120 ◦C) maintained the crystal lattice of the BBN precursor (Bi6O5(OH)3(NO3)5.3H2O), while the synthesis carried out at 230 ◦C led to lamellar Bi2O2(OH)(NO3). Despite of the sample treated at 230 ◦C did not present the required band edge positions to reduce CO2, all the other materials were active for CO2 photoreduction. CO (~2.8 μmol g− 1 h− 1 ) was identified as the main product, followed by C2H4 (~0.1 μmol g− 1 h− 1 ), with the latter being favored using the nanocomposite produced at 120 ◦C. Scavenger experiments revealed that the photocatalytic mechanism is based on a Z-scheme, where molecules are oxidized in the valence band of Nb2O5 and CO2 is reduced in the conduction band of BBN.
653 $aCatalytic properties
653 $aChemical synthesis
653 $aComposites
653 $aNanostructures
700 1 $aTORRES, J. A.
700 1 $aGONÇALVES, R. V.
700 1 $aRIBEIRO, C.
700 1 $aNOGUEIRA, F. G. E.
700 1 $aRUOTOLO, L. A. M.
773 $tMaterials Research Bulletin$gv. 133, a. 111073, 2021.
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