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Highly photocatalytic activity of brookite/rutile TiO2 nanocrystals with semi-embedded structure

Paper ID Volume ID Publish Year Pages File Format Full-Text
45273 46407 2016 8 PDF Available
Title
Highly photocatalytic activity of brookite/rutile TiO2 nanocrystals with semi-embedded structure
Abstract

•High content of brookite (72%) was achieved via a solvothermal approach.•Tert-butanol was found that can induce the formation of brookite.•High rate constants of three times higher than commercial DegussaP-25.•Phase composition, content as well as hybrid crystal structure were analyzed to explore the synergetic effect.•Semi-embedded structure importantly influences the final activity.

A facile solvothermal approach was used to prepare brookite-type TiO2 nanocrystals with different phase content and structure, accomplished by adjusting the ratio of TiCl4 to t-BuOH. The obtained biphasic brookite/rutile TiO2 nanocrystals showed a high brookite weight content (72%). The photocatalytic degradation of phenol under UV-irradiation was used to determine the synergetic effect from the combination of different phases (e.g., brookite, anatase, and rutile). The biphasic NST-4 composed of brookite and rutile exhibited the highest degradation rates, with rate constants three times higher than commercial Degussa P-25. Detailed analysis found that, besides phase composition and content, the semi-embedded structure was essential to obtain a superior activity of biphasic TiO2 samples.

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Keywords
Brookite/rutile TiO2; Semi-embedded structure; Photocatalytic activity; Solvothermal approach
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Highly photocatalytic activity of brookite/rutile TiO2 nanocrystals with semi-embedded structure
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 180, January 2016, Pages 551–558
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