Cerium–zirconium mixed oxide synthesized by sol-gel method and its effect on the oxygen vacancy and specific surface area

Campos, Pablo Teles Aragão; Oliveira, Claudinei Fabiano; Lima, João Pedro Vieira; Silva, Daniele Renata de Queiroz; Dias, Sílvia Cláudia Loureiro; Dias, José Alves

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Campo DC	Valor	Idioma
dc.contributor.author	Campos, Pablo Teles Aragão	-
dc.contributor.author	Oliveira, Claudinei Fabiano	-
dc.contributor.author	Lima, João Pedro Vieira	-
dc.contributor.author	Silva, Daniele Renata de Queiroz	-
dc.contributor.author	Dias, Sílvia Cláudia Loureiro	-
dc.contributor.author	Dias, José Alves	-
dc.date.accessioned	2022-08-22T22:37:55Z	-
dc.date.available	2022-08-22T22:37:55Z	-
dc.date.issued	2021	-
dc.identifier.citation	CAMPOS, Pablo Teles Aragão et al. Cerium–zirconium mixed oxide synthesized by sol-gel method and its effect on the oxygen vacancy and specific surface area. Journal of Solid State Chemistry, v. 307, art. 122752, mar. 2022. DOI 10.1016/j.jssc.2021.122752. Disponível em: https://www.sciencedirect.com/sdfe/reader/pii/S0022459621007970/pdf. Acesso em: 22 ago. 2022.	pt_BR
dc.identifier.uri	https://repositorio.unb.br/handle/10482/44617	-
dc.language.iso	Inglês	pt_BR
dc.publisher	Elsevier	pt_BR
dc.rights	Acesso Restrito	pt_BR
dc.title	Cerium–zirconium mixed oxide synthesized by sol-gel method and its effect on the oxygen vacancy and specific surface area	pt_BR
dc.type	Artigo	pt_BR
dc.subject.keyword	Nanoestruturas	pt_BR
dc.subject.keyword	Óxido de zinco	pt_BR
dc.subject.keyword	Óxido de cério	pt_BR
dc.identifier.doi	https://doi.org/10.1016/j.jssc.2021.122752	pt_BR
dc.description.abstract1	In this study, cerium-zirconium mixed oxides were prepared using the sol-gel methodology with cetyltrimethylammonium bromide (CTAB) for tuning the specific surface area and pore volume. The composition of Ce0.8Zr0.2O2 (CZ) was selected as being one of the most active for soot oxidation, which is a concern as an environmental pollutant. The structural and morphological properties were investigated using EDXRF, XRD, SEM/EDS, Raman and N2 physisorption at low temperature. The catalytic test was evaluated by temperatureprogrammed oxidation coupled with mass spectrometry (TPO/MS). Any variation in the CTAB concentration during synthesis changed the particle size and surface area, indicating that the particle formation follows a mechanism in which the CTAB acts as capping agent. Additionally, the material synthesized with CTAB was found to have higher oxygen vacancy compared to the materials from the conventional sol-gel process. The catalytic test suggested that the material with the smallest surface area had the lowest temperature of oxidation (T50% = 400o C), which demonstrates that the oxygen vacancy parameter is essentially more important than the specific surface area itself.	pt_BR
dc.contributor.email	mailto:jdias@unb.br	pt_BR
dc.description.unidade	Instituto de Química (IQ)	pt_BR
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