The Role of Stable Bicarbonate Formation on the Loss of Photocatalytic Activity of TiO2 in Grout Media

Abstract

In this study, we report the photocatalytic activity of TiO2 monitored by benzene oxidation in the grout medium. The results of the batch reaction tests indicated that the activity of TiO2 coated on grout was substantially less than TiO2 coated on a glass substrate. CO2 adsorption on these samples monitored by DRIFTS indicated that the loss of activity in the grout medium was due to formation of stable carbonates-bicarbonates in highly alkaline grout media.

Keywords

• photocatalytic benzene oxidation
• co2 adsorption
• drifts
• cement
• grout
• bicarbonate
• tio2