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Electronic characterization and photocatalytic properties of CdS/TiO2 semiconductor composite

Paper ID Volume ID Publish Year Pages File Format Full-Text
28528 44080 2006 6 PDF Available
Title
Electronic characterization and photocatalytic properties of CdS/TiO2 semiconductor composite
Abstract

Titanium dioxide is broadly used as a catalyst for photochemical reactions. In this work, nanometric particles of CdS (a narrow band gap semiconducting material) were used to impregnate TiO2 in order to optimize its photocatalytic properties. CdS/TiO2 semiconductor composites were obtained in 1, 3, 5 and 20 mol% proportion and characterized by differential thermogravimetric analysis (DTG), X-ray diffraction (XRD), laser-induced fluorescence (LIF) and resonance Raman spectroscopy. The results identified the CdS in hexagonal geometry and the TiO2 in anatase form. Resonance Raman spectroscopy data revealed a lattice softening of the TiO2-anatase phase due to electronic interaction between TiO2 and CdS in the CdS/TiO2 catalyst. The effect of modifying the proportion of CdS in the catalyst electronic properties and efficiency was also studied. The photocatalytic activity of the CdS/TiO2 was investigated using artificial UV light for degradation of the textile azo-dye Drimaren red. The photocatalytic analysis revealed better efficiency for the CdS/TiO2 5% composite as compared with other CdS/TiO2 proportions and with TiO2 alone.

Keywords
Photocatalysis; Resonance Raman; Titanium dioxide; Cadmium sulfide; Advanced oxidative processes; Environmental photochemistry
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Electronic characterization and photocatalytic properties of CdS/TiO2 semiconductor composite
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 181, Issues 2–3, 31 July 2006, Pages 152–157
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us