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Photodeposition of CdSe using Se-TiO2 suspensions as photocatalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
28733 44089 2006 9 PDF Available
Title
Photodeposition of CdSe using Se-TiO2 suspensions as photocatalysts
Abstract

The photodeposition of cadmium selenide (CdSe) using Se-TiO2 photocatalysts was studied at pH 3.5 and 7 in the presence of formic acid. The Se-TiO2 photocatalysts were obtained by Se ion photoreduction using selenite (Se(IV)) and selenate (Se(VI)) as precursors. The formation of cadmium selenide was attributed to the reaction between cadmium ions and selenide ions (Se2−) released from the Se deposited on TiO2 particles under illumination. The release of the Se2− ions from the Se–TiO2 is believed to be the determining step for the formation of the CdSe particles, hence controlling their morphology as either rod-shaped or spherical. Metallic cadmium was also detected on the surface of TiO2 particles as a product of the photocatalytic reduction at pH 7. Its formation was attributed to the photoreduction of cadmium by the photogenerated electrons in the TiO2 and/or the Se semiconductors.

Keywords
Cadmium selenide; Photocatalytic reduction; Titanium dioxide; Mechanism; Morphology
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Photodeposition of CdSe using Se-TiO2 suspensions as photocatalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 179, Issues 1–2, 1 April 2006, Pages 57–65
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
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Full-text PDF Download
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