Long-range and short-range structures of cube-like shape SrTiO3 powders: microwave-assisted hydrothermal synthesis and photocatalytic activity

dc.contributorUniversidade Estadual Paulista (Unesp)
dc.creatorSilva, Luís F. da
dc.creatorAvansi, Waldir
dc.creatorAndrés, Juan
dc.creatorRibeiro, Caue
dc.creatorMoreira, Mário L.
dc.creatorLongo, Elson [UNESP]
dc.creatorMastelaro, Valmor R.
dc.date2015-05-15T13:30:16Z
dc.date2015-05-15T13:30:16Z
dc.date2013
dc.date.accessioned2023-09-12T05:01:39Z
dc.date.available2023-09-12T05:01:39Z
dc.identifierhttp://pubs.rsc.org/en/Content/ArticleLanding/2013/CP/c3cp50643f#!divAbstract
dc.identifierPCCP. Physical Chemistry Chemical Physics, v. 15, p. 12386-12393, 2013.
dc.identifier1463-9076
dc.identifierhttp://hdl.handle.net/11449/123473
dc.identifier10.1039/c3cp50643f
dc.identifier5321313558714462
dc.identifier7422167106177474
dc.identifier8498310891810082
dc.identifier5852409796882171
dc.identifier4361220072322558
dc.identifier6395095165722635
dc.identifier9848311210578810
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8772911
dc.descriptionWe report herein a detailed study on the influence of microwave-assisted hydrothermal (MAH) treatment time on both long and short range structures around Ti atoms of SrTiO3 powders. Few studies have been carried out on short-order structural properties as well as the relationship between the local order and the SrTiO3 photocatalytic properties. We use X-ray diffraction to determine the long-range structure, while the local environment around the Ti atom is probed with X-ray absorption spectroscopy and the vibration frequencies are investigated by Raman spectroscopy. The faster crystallization of SrTiO3 powders provided by the MAH system resulted in large distortions of Ti–O bond lengths which remain unchanged even for a longer MAH treatment time. Despite the long-range structure being associated with ideal TiO6 clusters, X-ray absorption spectroscopy measurements identified the presence of undercoordinated TiO5 clusters. Compared with the reference bulk SrTiO3, the hierarchical SrTiO3 cube-like shape showed enhanced photocatalytic activity, which was associated with the presence of these TiO5 clusters. Field emission scanning electron microscopy (FE-SEM) revealed that the superstructures based on a cube-like shape are formed by an assembly process, becoming well defined as a function of MAH treatment time.
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionUniversidade Estadual Paulista Júlio de Mesquita Filho, Departamento de Bioquímica e Tecnologia Química, Instituto de Química de Araraquara, Araraquara, Rua Francisco Degni, 55, Quitandinha, CEP 14801907, SP, Brasil
dc.descriptionUniversidade Estadual Paulista Júlio de Mesquita Filho, Departamento de Bioquímica e Tecnologia Química, Instituto de Química de Araraquara, Araraquara, Rua Francisco Degni, 55, Quitandinha, CEP 14801907, SP, Brasil|Instituto de Física de Sa˜o Carlos, Universidade de Sa˜o Paulo, Avenida Trabalhador Sa˜o-carlense, 400, 13566-590, Sa˜o Carlos, SP, Brazil.
dc.descriptionDepartamento Química-Física y Analítica, Universitat Jaume I, Campus de Riu Sec, Castello E-12080, Spain d EMBRAPA Instrumentaça˜o, Rua XV de novembro, 1452, 13560-970, Sa˜o Carlos, SP, Brazil
dc.descriptionINCTMN, Physical and Mathematics Institute (IFM), Universidade Federal de Pelotas, Campus Universitário Capa˜o do Lea˜o, P.O. Box 354, 96010-900, Pelotas, RS, Brazil
dc.format12386-12393
dc.languageeng
dc.relationPCCP. Physical Chemistry Chemical Physics
dc.relation3.906
dc.relation1,686
dc.rightsAcesso restrito
dc.sourceCurrículo Lattes
dc.subjectMicrowave-Assisted Hydrothermal
dc.subjectSrTiO3
dc.titleLong-range and short-range structures of cube-like shape SrTiO3 powders: microwave-assisted hydrothermal synthesis and photocatalytic activity
dc.typeArtigo


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