Synthesis and photocatalytic properties of α-ZnWO4 nanocrystals in tungsten zinc borate glasses

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Abstract

Tungsten oxide (WO3)-containing glasses of WO3-ZnO-B2O3 were prepared using a conventional melt quenching method, and α-ZnWO4 nanocrystals were synthesized through the crystallization of glasses. A glass with the composition of 20WO3-50ZnO-30B2O3 showed the bulk crystallization of α-ZnWO4 nanocrystals with a diameter of ~10nm. Broad and asymmetric emission peaks were observed at the wavelength of λ~475nm, i.e., blue emissions, in the photoluminescence spectra for the samples with α-ZnWO4 nanocrystals. From the degradation of the intensity of optical absorption under ultraviolet light (λ=254nm) irradiations for the solution consisting of crystallized particles with α-ZnWO4 nanocrystals and methylene blue, it was clarified that α-ZnWO4 nanocrystals formed have photocatalytic activities. The formation of α-ZnWO4 nanocrystals is discussed from the viewpoint of the glass-forming tendency. © 2014 The Ceramic Society of Japan and the Korean Ceramic Society.

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Ida, T., Shinozaki, K., Honma, T., & Komatsu, T. (2014). Synthesis and photocatalytic properties of α-ZnWO4 nanocrystals in tungsten zinc borate glasses. Journal of Asian Ceramic Societies, 2(3), 253–257. https://doi.org/10.1016/j.jascer.2014.05.006

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