Morphological evolution and visible light-induced degradation of Rhodamine 6G by nanocrystalline bismuth tungstate prepared using a template-based approach
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2016-09-01
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Silva, Raissa Mendes
Batista Barbosa, Diego Augusto
De Jesus Silva Mendonça, Caritas
De Oliveira Lima, José Renato
Silva, Fernando Carvalho
Longo, Elson [UNESP]
MacIel, Adeilton Pereira
De Araujo Paschoal, Carlos William
Almeida, Marcio Aurélio Pinheiro
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The cleaning of water contaminated with organic dyes is a crucial problem nowadays. The search for good catalysts is intense, and bismuth tungstates have attracted a lot of attention because of their catalytic properties which are related to their crystal structure and morphology. In this study, we show that Bi2WO6 (BWO) crystals synthesized by the surfactant-assisted hydrothermal method create a different morphology than non-assisted crystals. With the assistance of the PVP surfactant, even the BWO crystalline structure could change, crystallizing into a high-symmetry metastable phase. These changes in morphology imply a decrease in BWO catalytic activity, which shows that insightful control of BWO synthesis is necessary to improve the BWO properties.
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Bi2WO6, Photodegradation, Surfactants
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Journal of Physics and Chemistry of Solids, v. 96-97, p. 83-91.