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Registro Completo |
Biblioteca(s): |
Embrapa Clima Temperado. |
Data corrente: |
19/01/2010 |
Data da última atualização: |
17/10/2011 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
FERREIRA, L. H. G.; SILVEIRA, C. A. P.; OSSANES, L. da S.; PILLON, C. N. |
Afiliação: |
L. H. G. FERREIRA; CARLOS AUGUSTO POSSER SILVEIRA, CPACT; L. da S. OSSANES; CLENIO NAILTO PILLON, CPACT. |
Título: |
Aplicação de diferentes fontes de fósforo e matriz fertilizante à base de xisto: avaliação da eficiência agronômica. |
Ano de publicação: |
2009 |
Fonte/Imprenta: |
In: ENCONTRO BRASILEIRO DE SUBSTÂNCIAS HÚMICAS, 8., 2009. Pelotas. Resumos... Pelotas: Embrapa Clima Temperado, 2009. p. 27. |
ISBN: |
978-85-85941-40-6 |
Idioma: |
Português |
Palavras-Chave: |
Eficiência agronômica. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00635naa a2200169 a 4500 001 1747255 005 2011-10-17 008 2009 bl uuuu u00u1 u #d 020 $a978-85-85941-40-6 100 1 $aFERREIRA, L. H. G. 245 $aAplicação de diferentes fontes de fósforo e matriz fertilizante à base de xisto$bavaliação da eficiência agronômica. 260 $c2009 653 $aEficiência agronômica 700 1 $aSILVEIRA, C. A. P. 700 1 $aOSSANES, L. da S. 700 1 $aPILLON, C. N. 773 $tIn: ENCONTRO BRASILEIRO DE SUBSTÂNCIAS HÚMICAS, 8., 2009. Pelotas. Resumos... Pelotas: Embrapa Clima Temperado, 2009. p. 27.
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Embrapa Clima Temperado (CPACT) |
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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 |
Circulação/Nível: |
A - 2 |
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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