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Photoactivity of tungsten and niobium composite of titania under UV irradiation

Kumar Gaurav, (a, b) Neha Kumari, (a, b) and A. S. Bhattacharyya, (a, c) and S. K. Samdarshi, (a, b, *)

(a) Centre for Excellence in Green and Efficient Energy Technology, Central University of Jharkhand, Ranchi 835205, Jharkhand, India.
(b) Centre for Energy Engineering, Central University of Jharkhand, Ranchi 835205, Jharkhand, India.
(c) Centre for Nanotechnology, Central University of Jharkhand, Ranchi 835205, Jharkhand, India

Carbon - Science and Technology 11/2 (2019) 57 - 64.

© Applied Science Innovations Private Limited, India.

Full Text (OPEN ACCESS):  CST-347.pdf

 

Image

SEM image of TW and TN

Keywords: Metal oxide, Photocatalyst, WO3-TiO2 composite, Nb2O5-TiO2 composite, Methylene Blue, Photodegradation.

Abstract: TiO2 has been shown to be excellent photoactive material in the presence of UV light. In order to make TiO2 a more efficient photocatalyst several attempts are being made. The present work attempts to address the issue through WO3-TiO2 (TW sample) and Nb2O5-TiO2 (TN sample) composites. Both the composite were synthesized through sol-gel process. The composites were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and UV–Visible spectrophotometer. The composites lower band gap value than DP25. This effect also seems to be reflected in photo-degradation experiment. Photo-degradation of methylene blue (MB) dye, in the presence of Nb2O5-TiO2, WO3–TiO2 composite and DP25 under UV irradiation was studied. WO3–TiO2 composites have superior photoactivity than Degussa P25 (DP25) while Nb2O5-TiO2 composite seems to have deteriorating effect on photoactivity of TiO2.

 

 


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