Analysis of pores titanium oxide on mesoporous silica-gelatin template using nitrogen adsorption by BET, BJH and t-plot methode

Analysis of the properties and characteristics of the internal pore structure of titanium oxide impregnated onto the surface of mesoporous silica from the gelatin template systematically has an important meaning for efficient application performance. In this research, mesoporous silica was synthesized using gelatin as a template then followed by impregnation of titanium oxide to produce TiO2/SG material which was calcined at 550 °C for 4 hours. The pore structure of TiO2/SG was analyzed by nitrogen adsorption with a low temperature of 300 °C degassing then analyzed on the adsorption isotherm using the BET method and pore size distribution using the BJH and t-plot methods. The isotherm of the TiO2/SG sample obtained by BET (Brunner, Emmett and Teller) method is categorized as type IV with the H2 loop hysteresis type which indicates that the TiO2/SG sample is a mesoporous material with tubular pores with surface area 550 m2/g. The distribution of the sharp pore size in the TiO2/SG sample measured at 38Å by BJH (Barrett-Joyner-Halenda) method from the data on the desorption branch which is intruded volume reaches closely to 73%. From t-plot result, the microporous areas of TiO2/SG were 197 m2/g from total surface area up to 550 m2/g du to the effect of the impregnation process which causes micropores in silica to be converted into micropores with a smaller size.