Abstract
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.
Original language | English |
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Pages (from-to) | 551-558 |
Number of pages | 8 |
Journal | Applied Catalysis B: Environmental |
Volume | 180 |
DOIs | |
State | Published - Jan 1 2016 |
Externally published | Yes |
Funding
This material is based upon work supported by the NSF of China ( 21207090 , 21377088 , 21477079 , 21407106 ), Shanghai Government ( 12nm0504000 , 13ZR1430600 , 14ZZ126 , 14ZR1430800 ), Program from 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 ), and Doctoral Program of Higher Education ( 20123127120009 ).
Keywords
- Brookite/rutile TiO
- Photocatalytic activity
- Semi-embedded structure
- Solvothermal approach