The Photocatalysis Properties of Heterostructured WO₃-TiO₂ Composite Prepared by Waste WC-TiC Hardmetal

Abstract:

We reported a facile hydrothermal route for the preparation of WO₃TiO₂ composite nanoparticles (TWCNs) using waste WC-TiC hardmetal in the presence of hydrofluoric acid (HF). Scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and nitrogen adsorption/desorption analysis were employed for structural and composition analyses of the TWCNs. Our results suggested that HF was not only strongly involved in the growth of WO₃, but also played a critical role in the etching effect for TWCN product. The photocatalytic activity of TWCNs was investigated by UV-vis spectroscopy. Dye molecules could be rapidly decomposed with TWCNs photocatalyst under visible light illumination. The enhanced photocatalytic activity is attributed to well matched band edge positions of WO₃ and TiO₂, and the large specific surface area of TWCNs in view of the incorporation of mesopores. The results presented here are expected to make a contribution toward the development of recycling waste resource delicately for photocatalytic water purification.

• Periodical: Advanced Materials Research (Volume 873)
• Pages: 603-611
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.873.603
• Online since: December 2013
• Authors: Yi Long Yang*, Jinshu Wang, Yong Li Li, Jun Shu Wu, Hong Yi Li
• Keywords: Hydrothermal, Photocatalysis, Recycle Waste Hardmetal, WO₃-TiO₂composite

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