Composite TiO2-SiO2 is one of the widest used as photocatalysts, especially in the treatment of pollutants and wastes. The aim of this research is to synthesized composite TiO2-SiO2 by sol-gel method using the bagasse ash which has a high of SiO2 content, which is between 46-81%. Synthesis the composite was carried out by following the research methods of Yusefah and Amaria in 2014 using calcin…