F. Rodrigues—contributing editor
Surface Chemistry and Dispersion Property of TiO2 Nanoparticles
Article first published online: 10 NOV 2010
© 2010 The American Ceramic Society
Journal of the American Ceramic Society
Volume 93, Issue 12, pages 4008–4010, December 2010
How to Cite
Li, C.-C., Chang, S.-J. and Tai, M.-Y. (2010), Surface Chemistry and Dispersion Property of TiO2 Nanoparticles. Journal of the American Ceramic Society, 93: 4008–4010. doi: 10.1111/j.1551-2916.2010.04222.x
This work was financially supported by the Ministry of Economic Affairs of Taiwan.
- Issue published online: 1 DEC 2010
- Article first published online: 10 NOV 2010
- Manuscript No. 28363. Received July 20, 2010; approved September 29, 2010.
The effect of a foreign substance, silica (SiO2), on the surface chemistry, chemical reactivity, and dispersibility of titania (TiO2) nanoparticles was investigated. SiO2 covers 90% of the surface of commercially available TiO2 nanoparticles and provides higher acidity, which facilitates the absorption of alkaline surfactant, oleylamine, onto TiO2 nanoparticles, leading to more efficient nanoparticle dispersion. By removing the surface SiO2 with an acid treatment, the acidity of TiO2 was highly reduced and became favorable to being adsorbed and dispersed by the acidic surfactant, oleic acid.