One-pot synthesis of peroxo-titania nanopowder and dual photochemical oxidation in aqueous methanol solution

Muthukonda Venkatakrishnan Shankar; Tetsuya Kako; Defa Wang; Jinhua Ye

doi:10.1016/j.jcis.2008.11.019

One-pot synthesis of peroxo-titania nanopowder and dual photochemical oxidation in aqueous methanol solution

J Colloid Interface Sci. 2009 Mar 1;331(1):132-7. doi: 10.1016/j.jcis.2008.11.019. Epub 2008 Nov 14.

Authors

Muthukonda Venkatakrishnan Shankar¹, Tetsuya Kako, Defa Wang, Jinhua Ye

Affiliation

¹ Photocatalytic Materials Center, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan.

PMID: 19038398
DOI: 10.1016/j.jcis.2008.11.019

Abstract

A sol-gel hydrothermal method was developed to synthesize peroxo-titania powders and their photooxidation performances were conducted in aqueous methanol solution under visible light irradiation. Three kinds of peroxo-titania were developed using TiO(2) and H(2)O(2) containing precursor sol with different dispersion mediums such as NH(3) aq NaOH aq, or pure water. Peroxo-titania powder prepared with NH(3) aq showed highest photooxidation activity. Moreover, we found unique photofunctional properties: together with formaldehyde production, the photo-excited electron also triggers oxygen evolution, although by TiO(2) (Degussa P-25) photocatalysis H(2) evolution was observed from the same solution.