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Hydrothermal crystallization of titania on silver nucleation sites for the synthesis of visible light nano-photocatalysts—Enhanced photoactivity using Rhodamine 6G

Paper ID Volume ID Publish Year Pages File Format Full-Text
40873 45869 2012 6 PDF Available
Title
Hydrothermal crystallization of titania on silver nucleation sites for the synthesis of visible light nano-photocatalysts—Enhanced photoactivity using Rhodamine 6G
Abstract

The doping of titania with metal ions is a well-established method for prolonging the recombination rate of photoexcited electrons to enhance its photocatalytic activity in the visible light region. In this work, silver–titania nanocomposite catalysts were successfully synthesized using an alternative hydrothermal synthetic pathway where suspended silver nanoparticles served as nucleation sites for the crystallization of titania. EDX analysis and TEM imaging were used to confirm the presence of silver on the titania. From the XRD results, titania produced by the present hydrothermal method were mainly in the anatase phase, while the addition of silver seemed to lower the content of rutile and brookite forms. Photocatalytic studies conducted by observing the photodegradation of Rhodamine 6G showed a marked improvement in visible light photocatalytic activity for silver-doped samples, although a diminishing effect in degradation rates was observed when silver concentration was increased beyond 3 mol%.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (159 K)Download as PowerPoint slideHighlights► Silver-titania nanoparticles has been developed by using a hydrothermal process. ► Silver has been used as nucleation sites to induce crystallization. ► The pH of titania precursor was observed to influence the phase of titania formed. ► The visible light photodegradation rate of Rhodamine 6G were significantly higher. ► A lower (1%) or higher (≥5%) silver concentration diminished the degradation rates.

Keywords
Hydrothermal crystallization; Silver; Titania; Visible light; Nano; Photocatalysis; Nucleation; Rhodamine 6G
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Hydrothermal crystallization of titania on silver nucleation sites for the synthesis of visible light nano-photocatalysts—Enhanced photoactivity using Rhodamine 6G
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 433–434, 8 August 2012, Pages 75–80
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
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