Fast and facile sonochemical synthesis of Mg‐ and Zn‐doped PbS nanospheres: optical properties and photocatalytic activity
| dc.contributor.author | Andrade Neto, Nivaldo Freire de | |
| dc.contributor.author | Ramalho, Onécima Biatriz de Medeiros | |
| dc.contributor.author | Fantucci, Hugo | |
| dc.contributor.author | Santos, Rafael Mattos dos | |
| dc.contributor.author | Delmonte, Maurício Roberto Bomio | |
| dc.contributor.author | Motta, Fabiana Villela da | |
| dc.date.accessioned | 2021-10-05T13:10:00Z | |
| dc.date.issued | 2020-07-14 | |
| dc.description.embargo | 2030-12-30 | |
| dc.description.resumo | In this work, Mg2+- and Zn2+-doped PbS nanopowders were synthesized simply and quickly by a sonochemical method. The nanopowders were characterized by X-ray difraction, wavelength dispersive X-ray fuorescence, scanning electron microscopy, and ultraviolet–visible spectroscopy. The photocatalytic activity was estimated by methylene blue dye degradation. The sonochemical method produces crystalline PbS particles with cubic structure and free of secondary phases. The use of polyvinylpyrrolidone as a surfactant, and reaction medium at pH 13, results in the formation of nanospheres with diameter ranging from 31.4 to 114.5 nm. Doping favors the absorption of radiation in the visible region, and consequently, reduces the optical bandgap of the PbS. Photocatalytic assays show that magnesium and zinc codoping results in 80% reduction of methylene blue concentration after 180 min, while undoped PbS achieves only 42%. Tests with charge scavengers indicate that holes (h+) act as the main mechanism in the photocatalytic process | pt_BR |
| dc.identifier.citation | ANDRADE NETO, N. F.; RAMALHO, O. B. M.; FANTUCCI, H.; SANTOS, R. M.; BOMIO, M. R. D.; MOTTA, F. V.. Fast and facile sonochemical synthesis of Mg- and Zn-doped PbS nanospheres: optical properties and photocatalytic activity. Journal of Materials Science: Materials in Electronics, [S.L.], v. 31, n. 17, p. 14192-14202, 14 jul. 2020. Disponível em: https://link.springer.com/article/10.1007%2Fs10854-020-03975-7. Acesso em: 20 abr. 2021. http://dx.doi.org/10.1007/s10854-020-03975-7. | pt_BR |
| dc.identifier.doi | 10.1007/s10854-020-03975-7 | |
| dc.identifier.issn | 1573-482X | |
| dc.identifier.issn | 0957-4522 | |
| dc.identifier.uri | https://repositorio.ufrn.br/handle/123456789/41562 | |
| dc.language | en | pt_BR |
| dc.publisher | Springer | pt_BR |
| dc.rights | Attribution 3.0 Brazil | * |
| dc.rights.uri | http://creativecommons.org/licenses/by/3.0/br/ | * |
| dc.subject | Sonochemical synthesis | pt_BR |
| dc.subject | Photocatalytic activity | pt_BR |
| dc.subject | Optical properties | pt_BR |
| dc.title | Fast and facile sonochemical synthesis of Mg‐ and Zn‐doped PbS nanospheres: optical properties and photocatalytic activity | pt_BR |
| dc.type | article | pt_BR |
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