Characterization of ZnAl2 O4 spinel obtained by hydrothermal and microwave assisted combustion method: a comparative study
| dc.contributor.author | Melo, Marcus Antônio de Freitas | |
| dc.contributor.author | Macedo, Heloísa Pimenta de | |
| dc.contributor.author | Melo, Dulce Maria de Araújo | |
| dc.contributor.author | Medeiros, Rodolfo Luiz Bezerra de Araújo | |
| dc.contributor.author | Medeiros, Amanda Lucena de | |
| dc.contributor.author | Figueredo, Gilvan Pereira de | |
| dc.contributor.author | Oliveira, Ângelo Anderson Silva de | |
| dc.date.accessioned | 2021-12-08T18:22:10Z | |
| dc.date.available | 2021-12-08T18:22:10Z | |
| dc.date.issued | 2017 | |
| dc.description.resumo | In this work, zinc aluminate spinel was prepared by two methods of directly synthesis (without calcination): microwave assisted combustion and hydrothermal method. The materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and N2-adsorption/desorption isotherms. The XRD patterns confirmed the formation of cubic ZnAl2O4 spinel structure with no secondary phases for both synthesis routes, whereas the hydrothermal method yielded powders with crystallite size 3 times smaller (6.9 nm), as compared to the powders produced by microwave assisted combustion method (25.6 nm). The micrographs revealed agglomerated powders with plate-like morphologies for both routes. Nitrogen adsorption/desorption isotherms (BET) revealed higher surface area (183 m2.g-1) and greater pore volume (0.173 cm3.g-1) for ZnAl2O4 powders prepared by the hydrothermal method | pt_BR |
| dc.identifier.citation | ALMEIDA, H. N.; CALIXTO, G. Q.; CHAGAS, B. M. E.; MELO, D. M. A.; RESENDE, F. M.; MELO, M. A. F.; BRAGA, Renata Martins . Characterization and pyrolysis of Chlorella vulgaris and Arthrospira platensis: potential of bio-oil and chemical production by Py-GC/MS analysis. Environmental Science and Pollution Research, v. 24, p. 14142-14150, 2017. Disponível em: https://link.springer.com/article/10.1007/s11356-017-9009-2. Acesso em: 13 out. 2021. https://doi.org/10.1590/1980-5373-MR-2016-0977 | pt_BR |
| dc.identifier.doi | 10.1590/1980-5373-MR-2016-0977 | |
| dc.identifier.issn | 1614-7499 | |
| dc.identifier.uri | https://repositorio.ufrn.br/handle/123456789/45287 | |
| dc.language | en | pt_BR |
| dc.publisher | Scielo | pt_BR |
| dc.rights | Attribution 3.0 Brazil | * |
| dc.rights.uri | http://creativecommons.org/licenses/by/3.0/br/ | * |
| dc.subject | Zinc Aluminate | pt_BR |
| dc.subject | Hydrothermal Method | pt_BR |
| dc.subject | Microwave Assisted Combustion | pt_BR |
| dc.title | Characterization of ZnAl2 O4 spinel obtained by hydrothermal and microwave assisted combustion method: a comparative study | pt_BR |
| dc.type | article | pt_BR |
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