Abstract
The exposure of more stable {001} facets to micro/nanostructure surface and heterojunction are effective measures to enhance the photocatalysis activity. A new mixed-crystal nanostructure of K3TiOF5/TiO2 with dominant {001} facets was well designed and successfully fabricated by a facile hydrothermal method. The introduction of K3TiOF5 stimulates the formation of stable and dominant {001} facets, and the mixed-crystal nanostructure improves the charge separation under light irradiation. Then, it is used to photodegradate anionic dyes, the photodegradation reaction rate of such K3TiOF5/TiO2 reaches up to 6.0108 h-1, which is 15.5 and 2.2 times higher than that of pure TiO2 nanospheres (0.3876 h-1) and P25 (2.6718 h-1), respectively. And more than 98% of MO are removed within 40 min. Its better photocatalysis activity would be mainly attributed to the efficient charge separation in such mixed-crystal nanostructure and ingenious morphology for giving more photocatalytic active-sites.
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