SYNTHESIS AND CHARACTERIZATION OF TITANIUM DIOXIDE SUPPORTED ON HEXAGONAL MESOPOROUS SILICAAND ITS APPLICATION AS PHOTOCATALYST FOR THE WASTEWATER TREATMENT
L. Aoudjit, F. Madjene, H. Lebik, B. Boutra, A. Sebti, S. Igoud
Abstract: Template synthesis of the porous materials is one of the most intensive research fields in the preparation of materials and catalysts. Many kinds of mesoporous materials such as hexagonal mesoporous silica (HMS) , SBA-n and FSM-16were synthesized by using various types of organic templating agents since M41S materials were successfully synthesized. These materials present a regular array of uniform one- or three-dimensional pores with diameters of 1.5–10 nm and high surface areas. Therefore, the mesoporous materials are suitable for use as a catalyst or support for the chemical reactions with larger molecules. Among these materials, the mesoporous molecular sieve with a wormhole framework structure denoted as HMS has many advantages. HMS is easily synthesized by the sol–gel reaction using a cheaper primary alkylamine as the structure direction agent at room temperature. Such HMS possesses thicker framework walls, small crystallite size of primary particles and complementary textural porosity to provide better transport channels for reactants and products. The transition metal cations can be incorporated into the HMS framework uniformly with high contents and the organic phasecan be totally removed from the as-synthesized HMS samples by simple calcination.In the present work, we report the synthesis and characterization of such materials impregnated titanium dioxide (TiO2) supported on Hexagonal Mesoporous (HMS).
Keywords: Water treatment, hexagonal mesoporous silica, TiO2/HMS.
Pages: 104 – 107 | Full PDF Paper