Morphological evolution and visible light-induced degradation of Rhodamine 6G by nanocrystalline bismuth tungstate prepared using a template-based approach

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...

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Bibliographic Details
Published in:The Journal of physics and chemistry of solids 2016-09, Vol.96-97, p.83-91
Main Authors: Silva, Raissa Mendes, Batista Barbosa, Diego Augusto, de Jesus Silva Mendonça, Caritas, de Oliveira Lima, José Renato, Silva, Fernando Carvalho, Longo, Elson, Maciel, Adeilton Pereira, de Araujo Paschoal, Carlos William, Almeida, Marcio Aurélio Pinheiro
Format: Article
Language:English
Subjects:
Bi2WO6
Bismuth
Catalysis
Catalysts
Crystal structure
Crystals
Morphology
Photodegradation
Searching
Surfactants
Tungstates
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Summary: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. •Bi2WO6 was successful synthesized by the template method.•We show the template has a strong role on Bi2WO6 structural arrangement, even changing its symmetry.•Catalytic activation by visible light changed according to the template.
ISSN:0022-3697
1879-2553
DOI:10.1016/j.jpcs.2016.05.004