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Visible and UV photocatalytic characterization of Sn–TiO2 electrospun fibers

Paper ID Volume ID Publish Year Pages File Format Full-Text
54836 47028 2013 4 PDF Available
Title
Visible and UV photocatalytic characterization of Sn–TiO2 electrospun fibers
Abstract

Nanostructured fiber-mats have large surface area, high reactivity, low weight and low agglomeration tendency. These are advantages if compared with nanoparticles for photocatalytic application. In this work, high temperature stable anatase titanium dioxide fiber-mats doped with tin (0.5–15%) were produced by electrospinning technology. The precursors used were titanium propoxide (TiP) and Tin 2-ethylhexanoate. They were hydrolyzed in acetic acid and mixed with an alcoholic solution of 10 wt.% PVP. The effect of heat treatment on the microstructure characteristics and the photocatalytic activity of the fiber-mats in comparison with a commercial TiO2 powder (Degussa P-25) were studied. After the electrospinning process, a thin, porous fiber-mat was obtained. This material was dried in air at room temperature for 24 h. These fibers were then heat treated from 450 to 800 °C for 3 h at a heating rate of 1.4 °C/min. The fiber-mats were then, characterized using N2 adsorption – BET surface area, X-ray diffraction for crystalline phase determination, and SEM and TEM analyses for morphological characterization. The photocatalytic properties were studied using as model system the degradation of methyl orange in water (20 ppm) under UV-A or visible light. The results show that the photoactivity increases with the increment in heat treatment temperature until 650 °C, when the fibers start to become densified and the surface area drops significantly due to sintering. The addition of Sn was beneficial to the photoactivity of TiO2 fibers.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (132 K)Download as PowerPoint slideHighlights► Synthesis of Sn-doped titania fibers using electrospinning. ► Highly UV photoactive photocatalyst containing 0.5 wt.% Sn was obtained. ► Sn promotes the formation of rutile even at lower synthesis temperature. ► The crystallinity and surface area of titania is affected by Sn.

Keywords
Electrospinning; Photocatalysis; Sn-doped titania
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Visible and UV photocatalytic characterization of Sn–TiO2 electrospun fibers
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 208, 1 June 2013, Pages 7–10
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