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Title: Synthesis of TiO2-SiO2 powder and thin film photocatalysts by sol-gel method
Authors: Aziz, Radhiyah Abd
Sopyan, Iis
Keywords: Catalysts;Photocatalysts;Sol-gel processes;Oxides;Binary oxides;Titania;Silica;Thin films
Issue Date: Jul-2009
Publisher: CSIR
IPC Code: Int. Cl.8 B01J21/00; B01J37/00
Abstract: Binary metal oxide TiO2-SiO2 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 TiO2-SiO2 powder and thin film are characterized using TG-DTA, FTIR, XRD, FESEM, and UV-vis data. XRD analysis shows that the TiO2-SiO2 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 TiO2-SiO2 particles in both powder and film are nano-sized spheres. The addition of low composition SiO2 to the TiO2 matrix suppresses the crystal growth of TiO2 and enhances the photocatalytic performance. The photocatalytic properties have been evaluated by studies on the degradation of gaseous acetaldehyde.
Page(s): 951-957
ISSN: 0975-0975 (Online); 0376-4710 (Print)
Appears in Collections:IJC-A Vol.48A(07) [July 2009]

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