The Sintesis Komposit Titania-Silika dengan Proses Sol gel

Abstract

Synthesis of titania silica composites has beenn made from geothermal sludge using sol gel and sonication methods. Sonication is used to decrease particles of TiO2 which helped of a sonicator with sulfuric acid solution as solvent for TiO2. Then, the sol gel method is used to composite silica (from geothermal sludge that extracted using NaOH into sodium silica solution) and TiO2 solution (that has been sonicated) into the mixture of titania-silica has been made. To study the effect composition of the composite used TiO2 from 4 until 8 grams of weight and pH of gelling from the sol gel process from 4 until 8. The product will be characterized with X-Ray fluorescence (XRF), X-Ray Diffraction (XRD), and Fourier Transform Infrared (FTIR). From the analysis shows, by variation weights of TiO2 and variation pH of gelling,ratio of the product (composite titania-silica) is obtained in range of 0,3113 until 1,5268. Then showing the presence of titania-silica bonds can be seen at 965.1 and 967.03 cm-1 of wave numbers. The XRD pattern of the composite shows the presence of amorphous silica and titania crystals on that product. This product can be used in the adsorption process if the compositions of silica is higher than titania, then can be used in the oxidation process if the compositions of titania is higher than silica.