Research on SiO2 extraction has been done from sugarcane bagasse using hydrothermal methods with variation NaOH concentration of 0.5; 1.0; 1.5; 2.0 M and calcination methods with temperature variation of 800, 900 and 1000ºC. Characterization of SiO2 extracted carriedovt using XRD analysis, FT-IR, and silica surface area calculation using the methylene blue adsorption method. The results of cha…