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Ag/TiO2/β-CD nano composite: Preparation and photo catalytic properties for methylene blue degradation

Paper ID Volume ID Publish Year Pages File Format Full-Text
40041 45843 2013 10 PDF Available
Title
Ag/TiO2/β-CD nano composite: Preparation and photo catalytic properties for methylene blue degradation
Abstract

•Synthesizing of new green Ag/TiO2/β-CD nanocomposites with different β-CD content.•Increasing the amount of synthesized Ag by more β-CD content.•Increasing visible region absorption in presence of β-CD.•Improving the stability of nanocomposite solution in presene of β-CD.•Synthesizing of Ag/TiO2/β-CD nanocomposite with a strong photo catalytic ability.

In this paper, Ag/TiO2/beta-cyclodextrin (β-CD) nano composite was successfully synthesized as a novel friendly nano photo catalyst with ability of loading various compounds. The influence of different β-cyclodextrin content in the formation of nano composites was investigated. Various analysis including FTIR, dynamic light scattering (DLS), diffuse reflectance spectroscopy (DRS), XRD, FESEM, EDAX, and TEM were used to characterize the prepared nano composites. The presence of β-CD in the nano composite was confirmed by FTIR patterns. FE-SEM pictures indicated roughly spherical particles and DLS results showed the average hydrodynamic diameters of 95 nm in aqueous dispersion that was bigger with more β-CD. TEM images confirmed the presence of three compounds in the nano composites. The peak intensity and the spectra intensity in the visible region increased with more β-CD confirming synthesis of more Ag on TiO2. The effective role of β-CD as stabilizer was also proved by the low reduction of the peak intensity for various nano composites after 15 days. One factor response surface methodology (RSM) was applied to model Methylene Blue degradation rate by Ag/TiO2/β-CD under UV irradiation. The mathematical model suggested significant improvement in the photo degradation rate of Ag/TiO2/β-CD in comparing with Ag/TiO2. However, more β-CD limitedly improved the degradation rate of Methylen Blue and excess β-CD was detrimental on the reduction of photo degradation rate.

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Keywords
Ag/TiO2/β-CD nano composite; Photo catalysis; UV–visible absorption; Response surface methodology
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Ag/TiO2/β-CD nano composite: Preparation and photo catalytic properties for methylene blue degradation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 467, 2 October 2013, Pages 107–116
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