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Surfactant-Mediated Morphology and Photocatalytic Activity of α‑Ag2WO4 Material
dc.contributor.author | Guerra Macedo, Nadia | |
dc.contributor.author | Gouveia, Amanda | |
dc.contributor.author | Alvarez Roca, Roman | |
dc.contributor.author | Assis, Marcelo de | |
dc.contributor.author | Gracia, Lourdes | |
dc.contributor.author | Andres, Juan | |
dc.contributor.author | Leite, Edson R. | |
dc.contributor.author | Longo, Elson | |
dc.date.accessioned | 2018-06-21T11:46:45Z | |
dc.date.available | 2018-06-21T11:46:45Z | |
dc.date.issued | 2018-03 | |
dc.identifier.citation | MACEDO, Nadia G., et al. Surfactant-Mediated Morphology and Photocatalytic Activity of α-Ag2WO4 Material. The Journal of Physical Chemistry C, 2018, 122.15: 8667-8679. | ca_CA |
dc.identifier.uri | http://hdl.handle.net/10234/175284 | |
dc.description.abstract | In the present work, the morphology (hexagonal rod-like vs cuboid-like) of an α-Ag2WO4 solid-state material is manipulated by a simple controlled-precipitation method, with and without the presence of the anionic surfactant sodium dodecyl sulfate (SDS), respectively, over short reaction times. Characterization techniques, such as X-ray diffraction analysis, Rietveld refinement analysis, Fourier-transform (FT) infrared spectroscopy, FT Raman spectroscopy, UV–vis spectroscopy, transmission electron microscopy (TEM), high-resolution TEM, selected area electron diffraction, energy-dispersive X-ray spectroscopy, field emission-scanning electron microscopy (FE-SEM), and photoluminescence emission, are employed to disclose the structural and electronic properties of the α-Ag2WO4 material. First-principles calculations were performed to (i) obtain the relative stability of the six low-index surfaces of α-Ag2WO4; (ii) rationalize the crystal morphologies observed in FE-SEM images (using the Wulff construction); and (iii) determine the energy profiles associated with the transformation process between both morphologies induced by the presence of SDS. Finally, we demonstrate a relationship between morphology and photocatalytic activity, evaluated by photodegradation of Rhodamine B dye under UV light, based on the different numbers of unsaturated superficial Ag and W cations (local coordination, i.e., clusters) of each surface. | ca_CA |
dc.format.extent | 13 p. | ca_CA |
dc.format.mimetype | application/pdf | ca_CA |
dc.language.iso | eng | ca_CA |
dc.publisher | American Chemical Society | ca_CA |
dc.rights | © 2018 American Chemical Society | ca_CA |
dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | * |
dc.subject | morphology | ca_CA |
dc.subject | photocatalytic activity | ca_CA |
dc.subject | dyes | ca_CA |
dc.subject | enamels | ca_CA |
dc.subject | electron diffraction | ca_CA |
dc.subject | infrared spectroscopy | ca_CA |
dc.title | Surfactant-Mediated Morphology and Photocatalytic Activity of α‑Ag2WO4 Material | ca_CA |
dc.type | info:eu-repo/semantics/article | ca_CA |
dc.identifier.doi | https://doi.org/10.1016/10.1021/acs.jpcc.8b01898 | |
dc.relation.projectID | Fundaca̧õ de Amparo à Pesquisa do Estado de Saõ Paulo (FAPESP 2012/ 14004-5, 2013/07296-2, 2017/07240-8, and 2013/26671-9) ; Conselho Nacional de Desenvolvimento Cientifíco e Tecnológico (CNPq 439234/2016-6, 150205/2017-1, and 166281/ 2017-4) ; Generalitat Valenciana (PrometeoII/2014/022, Prom-eteo/2016/079, ACOMP/2014/270, ACOMP/2015/1202) ; Ministerio de Economia y Competitividad (CTQ2015-65207-P) ; Programa de Cooperacioń Cientifica con Iberoamerica (Brasil) of Ministerio de Educación (PHBP14-00020) | ca_CA |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | ca_CA |
dc.relation.publisherVersion | https://pubs.acs.org/doi/abs/10.1021/acs.jpcc.8b01898 | ca_CA |
dc.date.embargoEndDate | 2019-03 | |
dc.type.version | info:eu-repo/semantics/acceptedVersion | ca_CA |
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