Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 76, Issue 1-2, Pages 168-173Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2007.05.024
Keywords
titanium dioxide; photocatalytic degradation; phenol; zinc oxide; anatase
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Anatase TiO2 nanoparticles in the size of ca. 6 nm were immobilized on the single-crystalline tetrapod-like ZnO (denoted as T-ZnO in the text) with dimensions up to 20-50 mu m by vapor hydrolysis method (VHM). Compared to the wet chemical deposition method, more uniform TiO2 layers with a tunable thickness were achieved by VHM. T-ZnO showed a relatively low efficiency in the photooxidation reaction of phenol. After coating of anatase nanoparticles, the photocatalytic activity of the nanocomposite (TiO2/T-ZnO) was significantly enhanced in photooxidation of phenol. Moreover, in contrast to the discrete nanoparticles, TiO2/T-ZnO could be very easily recovered from the treated solution by a most common filter paper. The easily recyclable feature and the high efficiency made TiO2/T-ZnO act as low-cost and feasible photocatalysts for the large-scale applications. (C) 2007 Elsevier B.V. All rights reserved.
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