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Surface characterization of nanostructured TiO2 and carbon blacks composites by dye adsorption and photoelectrochemical studies

Paper ID Volume ID Publish Year Pages File Format Full-Text
48742 46520 2006 10 PDF Available
Title
Surface characterization of nanostructured TiO2 and carbon blacks composites by dye adsorption and photoelectrochemical studies
Abstract

Photocatalysts based on nanostructured TiO2 and carbon blacks (CB) particles were obtained by chemical (sol–gel) and physical (mechanical grinding) preparation techniques. Characterization of these samples by XRD, FT-IR and dye adsorption studies was combined with optical and scanning photoelectrochemical analysis in an attempt to explain the photodegradation efficiency of these materials. The superior adsorption of sol–gel materials in the aqueous dye solutions did not account for the differences observed in photocatalytic activity, where the sol–gel composite outperforms the physical mixture or TiO2 alone by one digit. Data on the photoelectrochemical activity of these composites showed the abundance of inactive sites in the mixtures, while the sol–gel composite showed a uniform active surface. Rectification properties brought up by carbon in sol–gel composites and plus the abundance of hydroxyl groups on the oxide surface are proposed to be responsible for the long-term activity of these photocatalysts.

Keywords
Titanium oxide; Carbon black; Nanostructures; Sol–gel; Photocatalysts; Photoelectrochemical; Adsorption; Methyl violet
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Surface characterization of nanostructured TiO2 and carbon blacks composites by dye adsorption and photoelectrochemical studies
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 69, Issues 1–2, 1 December 2006, Pages 65–74
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
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Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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Any Questions? feel free to contact us