Preparation of mesoporous silica derived from geothermal silica as precursor with a surfactant of cethyltrimethylammonium bromide Free

Mesoporous silica as a carrier for the delivery system of a substance has increased significantly over the past few years. This study focused on the synthesis of mesoporous silica with cetyltrimethylammonium bromide (CTAB) as surfactant and sodium silicate from geothermal silica. The molar ratio of sodium silicate was varied with molar cetyltrimethylammonium bromide (CTAB) at 0.5, 1, and 1.5 mols at constant mol of CTAB. Stöber method was used in this research with addition of ethanol, NH4OH, and water with a mol ratio of 10: 22.8: 5.2 to mol CTAB, respectively. The mesoporous silica was characterized by using BET. The results showed that the porosity of silica particles was strongly influenced by the addition of sodium silicate. The optimum mol variable of sodium silicate was obtained at 1 mol of sodium silicate. The mesoporous silica revealed a diameter of 4.32 nm and 9.5 nm at adsorption and desorption, respectively and having the adsorption-desorption curve type of IV and V which classified as the mesoporous particle.