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Effect of deposition of silver on structural characteristics and photoactivity of TiO2-based photocatalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
46268 46436 2012 9 PDF Available
Title
Effect of deposition of silver on structural characteristics and photoactivity of TiO2-based photocatalysts
Abstract

The homemade bare TiO2 photocatalyst obtained in a previous work was modified with nanosized silver particles by liquid impregnation and photodeposition methods to obtain different noble metal loadings (0.3–1 at.%). Characterization of the synthesized photocatalysts was carried out by the BET method, XPS, TEM, SEM-EDX, XRD and diffuse reflectance measurements. Photocatalytic activity of these silver-deposited TiO2 nanoparticles was tested by photocatalytic degradation of phenol as a reference model representing phenolic pollutants. The noble metal content on the TiO2 surface affected the efficiency of the photocatalytic process, and the photocatalytic activity of noble metal-modified TiO2 was considerably better than that of bare TiO2. Phenol decomposition rate was higher with TiO2 modified by the liquid impregnation method than with TiO2 modified by the photodeposition method.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► A highly photoactive homemade photocatalyst was modified by silver deposits. ► The liquid impregnation method resulted in photocatalysts with higher activity. ► Photoactivity of 0.3Ag-iTiO2 was higher than that of P25 for several pollutants. ► Its efficiency decreases only slightly after the first use. ► 0.3Ag-iTiO2 sediments quickly and so, its reutilization would be possible.

Keywords
TiO2; Silver; Impregnation; Photodeposition; Photocatalysis; Phenol
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Effect of deposition of silver on structural characteristics and photoactivity of TiO2-based photocatalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 127, 30 October 2012, Pages 112–120
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