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Surfactant-free synthesis uniform Ti1−xSnxO2 nanocrystal colloids and their photocatalytic performance

Paper ID Volume ID Publish Year Pages File Format Full-Text
47144 46462 2010 9 PDF Available
Title
Surfactant-free synthesis uniform Ti1−xSnxO2 nanocrystal colloids and their photocatalytic performance
Abstract

The preparation of Ti1−xSnxO2 nanocrystal colloids from peroxo-metal precursor by hydrothermal method was reported in this work. The obtained materials were investigated by means of XRD, Raman, TEM, XPS, ICP-AES, N2 adsorption–desorption measurements (BET), PL and UV–vis spectroscopies technology. Photocatalytic degradation of phenol was studied under UV illumination. The results indicated that Ti1−xSnxO2 nanocrystal colloids were obtained in the nanometer scale (less than 10 nm) and the crystallite size was smaller than pure TiO2. Anatase phase, mixture phase (anatase and rutile) and rutile phase of Sn-doped TiO2 samples were formed, when x < 0.04, 0.04 < x < 0.06 and x ≥ 0.06, respectively. The Sn4+ dopants presented substitution Ti4+ into the lattice of TiO2 alongside increasing the surface oxygen vacancies and the surface hydroxyl groups. Regarding photocatalytic activity, Sn-doped TiO2 samples (TiSn3) were nearly four times higher than undoped samples. This obvious beneficial effect could be attributed to high surface area, optimal crystalline phase and surface state modifications.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights▶ Anatase, rutile and mixture phase of Ti1−xSnxO2 samples were formed by changing Sn/Ti ratio. ▶ Enhanced activity attributes to high surface area, optimal crystalline phase and surface state.

Keywords
Titanium dioxide; Nanocrystal colloids; Photocatalytic; Sn4+ dopant; Peroxo-metal precursor; Hydrothermal method
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 100, Issues 1–2, 11 October 2010, Pages 68–76
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