Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 180, Issue -, Pages 551-558Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2015.07.003
Keywords
Brookite/rutile TiO2; Semi-embedded structure; Photocatalytic activity; Solvothermal approach
Funding
- NSF of China [21207090, 21377088, 21477079, 21407106]
- Shanghai Government [12nm0504000, 13ZR1430600, 14ZZ126, 14ZR1430800]
- Huo Yingdong Education Foundation [142022]
- Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT) [IRT1269]
- Program for Professor of Special Appointment (Eastern Scholar) [2012-82, 2013-57]
- Doctoral Program of Higher Education [20123127120009]
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A facile solvothermal approach was used to prepare brookite-type TiO2 nanocrystals with different phase content and structure, accomplished by adjusting the ratio of TiCl (4) 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. (C) 2015 Elsevier B.V. All rights reserved.
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