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Title: Synthesis of TiO<sub>2</sub>-SiO<sub>2</sub> powder and thin film photocatalysts by sol-gel method
Authors: Aziz, Radhiyah Abd
Sopyan, Iis
Keywords: Catalysts
Sol-gel processes
Binary oxides
Thin films
Issue Date: Jul-2009
Publisher: CSIR
Series/Report no.: Int. Cl.<sup>8</sup><b style=""> </b>B01J21/00; B01J37/00
Abstract: Binary metal oxide TiO<sub>2</sub>-SiO<sub>2</sub> powder and thin film photocatalysts have been synthesized via sol-gel method using tetraethoxysilane and a titanium chelate compound as the silicon and titanium precursors respectively. The physico-chemical properties of the TiO<sub>2</sub>-SiO<sub>2</sub> powder and thin film<b style=""> </b>are characterized using TG-DTA, FTIR, XRD, FESEM, and UV-vis data. XRD analysis shows that the TiO<sub>2</sub>-SiO<sub>2</sub> powder and thin film obtained are in fully anatase structure after calcination at 500°C, which is also confirmed by TG-DTA analysis. The FESEM picture shows that the TiO<sub>2</sub>-SiO<sub>2</sub> particles in both powder and film are nano-sized spheres. The addition of low composition SiO<sub>2</sub> to the TiO<sub>2</sub> matrix suppresses the crystal growth of TiO<sub>2</sub> and enhances the photocatalytic performance. The photocatalytic properties have been evaluated by studies on the degradation of gaseous acetaldehyde.
Description: 951-957
ISSN: 0975-0975 (Online); 0376-4710 (Print)
Appears in Collections:IJC-A Vol.48A(07) [July 2009]

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