Evaluation of two processing routes for the synthesis of molybdenum oxide with cobalt addition

Molybdenum oxides are very interesting technologic materials, which present several industrial uses. The addition of a second metal may enhance its catalytic properties as well as change electronic behavior. Several methodologies for adding a second metal can be found in the literature, however, the...

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Autor principal: Araújo, Camilla Pacelly Brandão
Formato: article
Idioma:English
Publicado em: Associação Brasileira de Cerâmica
Assuntos:
Solid-state
Doping
Molybdenum oxide
Wet impregnation
Endereço do item:https://repositorio.ufrn.br/handle/123456789/31163
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spelling ri-123456789-311632021-01-03T08:24:29Z Evaluation of two processing routes for the synthesis of molybdenum oxide with cobalt addition Avaliação de duas rotas de processamento para produção de óxido de molibdênio com adição de cobalto Araújo, Camilla Pacelly Brandão Solid-state Doping Molybdenum oxide Wet impregnation Molybdenum oxides are very interesting technologic materials, which present several industrial uses. The addition of a second metal may enhance its catalytic properties as well as change electronic behavior. Several methodologies for adding a second metal can be found in the literature, however, the comparison between them is hardly ever found. Here two processing routes were tested for the synthesis of molybdenum oxide with cobalt addition: solid-state and wet routes. Ammonium molybdate and cobalt nitrate were used as starting materials and cobalt addition was carried out before calcination. Starting materials were characterized by SEM, FTIR, XRF, and XRD. Calcination products were evaluated by SEM, XRF, XRD and UV-vis spectroscopy. Calcined products whose doping was performed via solid-state presented smaller crystal size (~25 nm), larger cobalt retention (deviation, δ ~10%) and slightly smaller band gap in comparison to those doped via the wet route (~40 nm and δ>11%) 2020-12-30T14:20:36Z 2020-12-30T14:20:36Z 2019-12-13 article ARAUJO, C. P. B.; FROTA, A. V. V. M.; SOUTO, M. V. M.; BARBOSA, C. M.; SILVA, M. M. S.; SOUZA, C. P. de. Evaluation of two processing routes for the synthesis of molybdenum oxide with cobalt addition. Cerâmica, [S.L.], v. 66, n. 377, p. 21-29, mar. 2020. Disponível em: https://www.scielo.br/scielo.php?pid=S0366-69132020000100021&script=sci_abstract. Acesso em: 22 out. 2020. http://dx.doi.org/10.1590/0366-69132020663772755. 1678-4553 0366-6913 https://repositorio.ufrn.br/handle/123456789/31163 10.1590/0366-69132020663772755 en Attribution-NonCommercial 3.0 Brazil http://creativecommons.org/licenses/by-nc/3.0/br/ application/pdf Associação Brasileira de Cerâmica
institution Repositório Institucional
collection RI - UFRN
language English
topic Solid-state
Doping
Molybdenum oxide
Wet impregnation
spellingShingle Solid-state
Doping
Molybdenum oxide
Wet impregnation
Araújo, Camilla Pacelly Brandão
Evaluation of two processing routes for the synthesis of molybdenum oxide with cobalt addition
description Molybdenum oxides are very interesting technologic materials, which present several industrial uses. The addition of a second metal may enhance its catalytic properties as well as change electronic behavior. Several methodologies for adding a second metal can be found in the literature, however, the comparison between them is hardly ever found. Here two processing routes were tested for the synthesis of molybdenum oxide with cobalt addition: solid-state and wet routes. Ammonium molybdate and cobalt nitrate were used as starting materials and cobalt addition was carried out before calcination. Starting materials were characterized by SEM, FTIR, XRF, and XRD. Calcination products were evaluated by SEM, XRF, XRD and UV-vis spectroscopy. Calcined products whose doping was performed via solid-state presented smaller crystal size (~25 nm), larger cobalt retention (deviation, δ ~10%) and slightly smaller band gap in comparison to those doped via the wet route (~40 nm and δ>11%)
format article
author Araújo, Camilla Pacelly Brandão
author_facet Araújo, Camilla Pacelly Brandão
author_sort Araújo, Camilla Pacelly Brandão
title Evaluation of two processing routes for the synthesis of molybdenum oxide with cobalt addition
title_short Evaluation of two processing routes for the synthesis of molybdenum oxide with cobalt addition
title_full Evaluation of two processing routes for the synthesis of molybdenum oxide with cobalt addition
title_fullStr Evaluation of two processing routes for the synthesis of molybdenum oxide with cobalt addition
title_full_unstemmed Evaluation of two processing routes for the synthesis of molybdenum oxide with cobalt addition
title_sort evaluation of two processing routes for the synthesis of molybdenum oxide with cobalt addition
publisher Associação Brasileira de Cerâmica
publishDate 2020
url https://repositorio.ufrn.br/handle/123456789/31163
work_keys_str_mv AT araujocamillapacellybrandao evaluationoftwoprocessingroutesforthesynthesisofmolybdenumoxidewithcobaltaddition
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