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| Registros recuperados : 2 | |
| Registros recuperados : 2 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
23/11/2022 |
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Data da última atualização: |
22/01/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
SILVA, F. B. F.; SILVA, G. T. S. T. da; TORRES, J. A.; OLIVEIRA, C. R. de. |
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Afiliação: |
CAUE RIBEIRO DE OLIVEIRA, CNPDIA. |
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Título: |
Tuning the photocatalytic activity of tin oxide through mechanical surface activation. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Journal of the Brazilian Chemical Society, v. 33, n. 7, 2022. |
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Páginas: |
725-733 |
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DOI: |
https://dx.doi.org/10.21577/0103-5053.20220009 |
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Idioma: |
Inglês |
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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. |
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Palavras-Chave: |
Bandgap dependence; Hydroxyl groups; Mechanical activation; SnO2 nanoparticles. |
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Categoria do assunto: |
-- |
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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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Registro original: |
Embrapa Instrumentação (CNPDIA) |
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