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Photocatalytic decolorization of Rhodamine B dye using novel mesoporous SnO2–TiO2 nano mixed oxides prepared by sol–gel method

Paper ID Volume ID Publish Year Pages File Format Full-Text
26549 43962 2013 8 PDF Available
Title
Photocatalytic decolorization of Rhodamine B dye using novel mesoporous SnO2–TiO2 nano mixed oxides prepared by sol–gel method
Abstract

•A novel SnO2–TiO2 coupled semiconductors were successfully prepared by sol–gel method using polymethylmethacrylate as controlling template agent.•A controlled crystalline and mesoporous structure was achieved using appropriate composition of SnO2.•Both adsorption and photocatalytic action are responsible for dye decolorization.•Complete decolorization of Rhodamine B dye was successfully proceeds on the sample exhibit 10 mol% SnO2.

The photocatalytic removal of Rhodamine B dye was successfully carried under UV irradiation over mesoporous SnO2/TiO2 nanoparticles embedded various molar compositions of SnO2 (0–25%) synthesized by sol–gel process using polymethylmethacrylate as template. Structural and textural features of the samples were investigated by X-ray diffraction (XRD), nitrogen adsorption–desorption isotherm, Fourier transformer infra-red (FTIR) and transmission electron microscope (TEM). The existence of tin oxide is associated with remarkable reduction in particle size to 6 nm and increasing the surface area up to161 m2/g revealing the successful role of SnO2 in manipulating high surface area nanoparticles. The TEM results revealed that well-dispersed and uniform spherical nanoparticles with diameters of 6 nm were embedded in the sample matrix. Both adsorption and UV irradiation are contribute for decolorization of about 92% of Rhodamine dye over the sample embedded 10% SnO2 after 3 h of the reaction compared with 70% only decomposition over pure titania. The photocatalytic decolorization of the dye follows a pseudo-first-order kinetics and the apparent rate constant was increase with increasing the tin oxide content up to 10%. The existence of tin oxide is associated with remarkable reduction in particle size, increasing the oxidizing power and increasing the efficiency of charge carrier separation which considered the main reasons for a remarkable increasing in the catalytic activity of the samples. As the mode of preparation is economically feasible, we can consider this catalyst to be very effective to decolorize various organic dyes.

Graphical abstractA series of mesoporous TiO2–SnO2 nano mixed oxide was prepared by sol–gel method that is effectively exhibit high photocatalytic activity in removal of Rhodamine B dye.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Mesoporous SnO2–TiO2 nanoparticle; Sol–gel; Photocatalysis; First order reaction; Rhodamine B decolorization
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Photocatalytic decolorization of Rhodamine B dye using novel mesoporous SnO2–TiO2 nano mixed oxides prepared by sol–gel method
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 260, 15 May 2013, Pages 1–8
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
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us