Chemistry Research Paper: Photocatalytic Cement by TiO2 Addition

Research Paper

Photocatalytic Cement by TiO2 Addition

Published On:
27-02-2012
Journal:
Materials Science Forum
Publisher:
Trans Tech Publications, Switerland
DOI:
10.4028/www.scientific.net/MSF.712.65
Volume:
712
Issue:
2012
Page:
65-72

Photocatalytically active TiO2 and silica doped TiO2 (Si-TiO2) synthesised using an aqueous sol-gel method and is characterised by particle size analysis, XRD, diffuse reflectance spectra and BET measurements. The photocatalytic analysis using methylene blue proved that the Si-TiO2 possesses higher activity than pure TiO2. This Si-TiO2 having higher photo-catalytic activity was incorporated into white portland cement and this modified cement exhibited photo-catalytic activity as evaluated by using methylene blue degradation experiments. This novel work is considered to be useful for further development of self-cleaning cements. Moreover silica doped to TiO2 improved surface area and thermal stability of anatase TiO2 significantly. At 800 ?C, 100 percentage anatase phase was obtained for Si-TiO2 whereas pure TiO2 showed 100 percentage rutile phase at the same temperature and surface aera of the Si-TiO2 was 93 m2/g while pure TiO2 showed only 2 m2/g.




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