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Registro Completo |
Biblioteca(s): |
Embrapa Instrumentação. |
Data corrente: |
23/11/2022 |
Data da última atualização: |
22/01/2024 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
SILVA, F. B. F.; SILVA, G. T. S. T. da; TORRES, J. A.; OLIVEIRA, C. R. de. |
Afiliação: |
CAUE RIBEIRO DE OLIVEIRA, CNPDIA. |
Título: |
Tuning the photocatalytic activity of tin oxide through mechanical surface activation. |
Ano de publicação: |
2022 |
Fonte/Imprenta: |
Journal of the Brazilian Chemical Society, v. 33, n. 7, 2022. |
Páginas: |
725-733 |
DOI: |
https://dx.doi.org/10.21577/0103-5053.20220009 |
Idioma: |
Inglês |
Conteúdo: |
Tin oxide (SnO2) nanoparticles were synthesized by the co-precipitation method and mechanically modified by high-energy ball milling. The experimental results demonstrate that the collision with zirconia balls produces slight changes in the crystalline, electronic, morphological, and surface properties of SnO2, which lead to an increase in the redox potential of the energy level and the formation of the hydroxyl group on the SnO2 surface. Moreover, these changes are intensified over the milling up to 90 min, directly affecting the photocatalytic performance, which was monitored by the rate of rhodamine B (RhB) degradation driven by ultraviolet (UV) irradiation. As a result, all ground samples showed better photocatalytic activity than pristine SnO2 (Sn-cop). The maximum degradation of rhodamine B was ca. 75%, achieved with 90 min-milled SnO2 nanoparticles (Sn-M90), compared to the Sn-cop sample induced a 1.67 times higher degradation rate. The reaction mechanism suggests that its better photocatalytic activity may be associated with the higher increased redox potential of the valence and conduction bands and the formation of hydroxyl active sites on the catalyst surface principal oxidizing agent generated. Therefore, we conclude that the ball milling process is an efficient way to induce stable activation of oxide metal for photocatalytic applications. |
Palavras-Chave: |
Bandgap dependence; Hydroxyl groups; Mechanical activation; SnO2 nanoparticles. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1148648/1/P-Tuning-the-Photocatalytic-Activity-of-Tin-Oxide-through-Mechanical-Surface.pdf
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Marc: |
LEADER 02105naa a2200229 a 4500 001 2148648 005 2024-01-22 008 2022 bl uuuu u00u1 u #d 024 7 $ahttps://dx.doi.org/10.21577/0103-5053.20220009$2DOI 100 1 $aSILVA, F. B. F. 245 $aTuning the photocatalytic activity of tin oxide through mechanical surface activation.$h[electronic resource] 260 $c2022 300 $a725-733 520 $aTin oxide (SnO2) nanoparticles were synthesized by the co-precipitation method and mechanically modified by high-energy ball milling. The experimental results demonstrate that the collision with zirconia balls produces slight changes in the crystalline, electronic, morphological, and surface properties of SnO2, which lead to an increase in the redox potential of the energy level and the formation of the hydroxyl group on the SnO2 surface. Moreover, these changes are intensified over the milling up to 90 min, directly affecting the photocatalytic performance, which was monitored by the rate of rhodamine B (RhB) degradation driven by ultraviolet (UV) irradiation. As a result, all ground samples showed better photocatalytic activity than pristine SnO2 (Sn-cop). The maximum degradation of rhodamine B was ca. 75%, achieved with 90 min-milled SnO2 nanoparticles (Sn-M90), compared to the Sn-cop sample induced a 1.67 times higher degradation rate. The reaction mechanism suggests that its better photocatalytic activity may be associated with the higher increased redox potential of the valence and conduction bands and the formation of hydroxyl active sites on the catalyst surface principal oxidizing agent generated. Therefore, we conclude that the ball milling process is an efficient way to induce stable activation of oxide metal for photocatalytic applications. 653 $aBandgap dependence 653 $aHydroxyl groups 653 $aMechanical activation 653 $aSnO2 nanoparticles 700 1 $aSILVA, G. T. S. T. da 700 1 $aTORRES, J. A. 700 1 $aOLIVEIRA, C. R. de 773 $tJournal of the Brazilian Chemical Society$gv. 33, n. 7, 2022.
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Embrapa Instrumentação (CNPDIA) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Recursos Genéticos e Biotecnologia. Para informações adicionais entre em contato com cenargen.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Recursos Genéticos e Biotecnologia. |
Data corrente: |
30/06/2021 |
Data da última atualização: |
10/01/2022 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
PUPIN, M. A. F.; VERGANI, G. B.; LIMA, M. S. D.; SILVA, K. de M.; RAMOS, A. F.; BATISTA, R. I. T. P.; FONSECA, J. F. da; OLIVEIRA, M. E. F. |
Afiliação: |
MARIA AMÉLIA FERRÃO PUPIN; GABRIEL BRUN VERGANI; MONALISA SOUSA DIAS LIMA; KLEIBE DE MORAES SILVA, CNPC; ALEXANDRE FLORIANI RAMOS, Cenargen; RIBRIO IVAN TAVARES PEREIRA BATISTA; JEFERSON FERREIRA DA FONSECA, CNPC; MARIA EMILIA FRANCO OLIVEIRA. |
Título: |
Do sheep breed effect influence superovulatory responses and embryos yields? |
Ano de publicação: |
2020 |
Fonte/Imprenta: |
Animal Reproduction, v. 17, n. 3, 2020. Edição dos Abstracts of the 34nd Annual Meeting of the Brazilian Embryo Technology Society (SBTE), 2020 (online). |
Idioma: |
Inglês |
Conteúdo: |
The aim was evaluated the breed effect on superovulatory responses and embryo yields in Brazilian native ewes submitted to a mid-term progesterone-based protocol and gonadotrophic treatment with 133 mg of pFSH. The study was conducted in the northeast of Brazil in ewes of three breeds: Morada Nova (MN; n=10); Santa Inês (SI; n=10) and Somalis (SO; n=10). |
Thesaurus NAL: |
Animal reproduction; Brazil; Embryo transfer; Gonadotropins; Progesterone; Sheep. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
Marc: |
LEADER 01223nam a2200265 a 4500 001 2132678 005 2022-01-10 008 2020 bl uuuu u01u1 u #d 100 1 $aPUPIN, M. A. F. 245 $aDo sheep breed effect influence superovulatory responses and embryos yields?$h[electronic resource] 260 $aAnimal Reproduction, v. 17, n. 3, 2020. Edição dos Abstracts of the 34nd Annual Meeting of the Brazilian Embryo Technology Society (SBTE), 2020 (online).$c2020 520 $aThe aim was evaluated the breed effect on superovulatory responses and embryo yields in Brazilian native ewes submitted to a mid-term progesterone-based protocol and gonadotrophic treatment with 133 mg of pFSH. The study was conducted in the northeast of Brazil in ewes of three breeds: Morada Nova (MN; n=10); Santa Inês (SI; n=10) and Somalis (SO; n=10). 650 $aAnimal reproduction 650 $aBrazil 650 $aEmbryo transfer 650 $aGonadotropins 650 $aProgesterone 650 $aSheep 700 1 $aVERGANI, G. B. 700 1 $aLIMA, M. S. D. 700 1 $aSILVA, K. de M. 700 1 $aRAMOS, A. F. 700 1 $aBATISTA, R. I. T. P. 700 1 $aFONSECA, J. F. da 700 1 $aOLIVEIRA, M. E. F.
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Embrapa Recursos Genéticos e Biotecnologia (CENARGEN) |
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