Degradation behavior of organic matters by using SiO2-TiO2/montmorillonite composites

Abstract

SiO2-TiO2 sol / montmorillonite (Mont) composites were prepared by mixing of Mont suspension with tetraethoxysilane and titanium tetra-n-butoxide solution. Obtained samples were characterized by XRD, EDS analysis and N2 adsorption-desorption. Degradation behavior of bisphenol A (BPA) under visible light was measured by HPLC and TOC analysis. Commercial TiO2 (P25) was used for reference sample. The obtained sample showed a similar degradation behavior of BPA to reference TiO2 though the TiO2 content was different. However, the generation behavior of the intermediate product was different between the obtained sample and commercial TiO2.