Preparation and Characterization of TiO2-Based Nano Particles and Tests for Their Activities in Meth¬ylene Blue Photodegradation

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Title: Preparation and Characterization of TiO2-Based Nano Particles and Tests for Their Activities in Meth¬ylene Blue Photodegradation
Authors: Duan, Aoshu
Date: 2014
Abstract: A two-step hydrothermal method was applied to synthesis Vanadium Sulfide (IV) coupled with commercial P25 on TiO2 nanoparticle (VS4-on-P25). Materials were characterized by scanning electron microscope (SEM), high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), ultraviolet–visible spectroscopy (UV-Vis), diffuse reflectance UV-Vis spectroscopy and Raman spectroscopy. Photocatalytic activity of this new material was determined by photo-degradation of Methylene blue (MB) under UV irradiation. Experiments show that the VS4-on-P25 exhibits a higher photocatalytic activity than commercial P25 by providing more active site for dye adsorption, and reducing the recombination of charge carriers. Furthermore, the VS4-on-P25 extends its light-absorption spectrum into visible-light range due to its narrower band gap. The highest photocatalytic activity was found with a VS4 loading of 6 wt.%, which outperforms pure P25 by a factor of 2.29 in MB degradation rate.
URL: http://hdl.handle.net/10393/31378
http://dx.doi.org/10.20381/ruor-3852
CollectionThèses, 2011 - // Theses, 2011 -
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