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Effect of quenching medium on photocatalytic activity of nano-TiO2 prepared by solvothermal method
Author(s)
Supphasrirongjaroen, Piyawat
Praserthdam, Piyasan
Panpranot, Joongjai
Mekasuwandumrong, Okorn
Date Issued
May 1, 2008
Type
Article
Abstract
Pure anatase nano-TiO2 powders were synthesized by solvothermal method using titanium butoxide as the precursor and were subjected to a rapid quenching in various media such as H2O, H2O2, air, and liquid N2 as a post-synthesis treatment. By creating a thermal shock effect, quenching process has shown to be an easy novel route for modifying surface defects of the nano-TiO2 and its photocatalytic activity. In this study, the TiO2 sample quenched in air at 77 K contained the highest amount of Ti3+ surface defect with the highest Ti3+/OH and was found to exhibit the highest photocatalytic activity for ethylene decomposition. © 2007 Elsevier B.V. All rights reserved.
Citation
Chemical Engineering Journal, 138(1-3), 622-627, 2008