Data/hora: 01/06/2024 00:38:29

Biblioteca(s): | Embrapa Instrumentação.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | A - 1
Data corrente: | 26/04/2021
Data da última atualização: | 10/06/2022
Autoria: | OLIVEIRA, J. A.; TORRES, J. A.; GONÇALVES, R. V.; RIBEIRO, C.; NOGUEIRA, F. G. E.; RUOTOLO, L. A. M.
Afiliação: | CAUE RIBEIRO DE OLIVEIRA, CNPDIA.
Título: | Photocatalytic CO2 reduction over Nb2O5/basic bismuth nitrate nanocomposites.
Ano de publicação: | 2021
Fonte/Imprenta: | Materials Research Bulletin, v. 133, a. 111073, 2021.
ISSN: | 0025-5408
DOI: | https://doi.org/10.1016/j.materresbull.2020.111073
Idioma: | Inglês
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.
Palavras-Chave: | Catalytic properties; Chemical synthesis; Composites; Nanostructures.
Categoria do assunto: | --
Registro original: | Embrapa Instrumentação (CNPDIA)
Exemplares: | CNPDIA - (17763-1) - UPC - AP - DD - PROCI.21/25 -  - 2021/25 - DIS