Add time:08/06/2019         Source:sciencedirect.com

WO3 nanocrystal was prepared through a simple calcination treatment of hierarchical nanostructures self-assembled from phosphotungstic acid and dopamine. The morphology, composition, and formation process of WO3 nanoparticles were characterized in detail. The results showed that as-prepared WO3 nanoparticles were highly crystallized and 40–50 nm in size with quite smooth surface. Moreover, the photocatalytic property of WO3 nanocrystal was investigated by the decomposition of typical azo dye under UV light irradiation (254 nm). Pure WO3 nanocrystal showed a high photodegradation efficiency for Congo red even under quite low UV irradiation. In view of its simplicity and low-cost, the present work provides a new way for fabrication of WO3 nanoparticles in the photocatalysis field.

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