سنتز صوت‌شيميايي، مشخصه‌يابي و كاربرد اكسيدهاي فلزي نانومتخلخل

Sonochemical Synthesis, Characterization and Application of Nanoporous Metal Oxide

Nanoporous metal oxides are an important class of porous materials. It is possible to increase their surface area by different methods and prepare regular pores with specific and similar geometry and also preset dimensions for required applications such as molecular detachment in membrane, molecular selection with high accuracy in the catalytic processes and other applications related to the surface. Nanoporous materials are prepared by conventional methods including hydrolyzing the inorganic precursors (usually metal alkoxide) in an acid, basic or neutral medium in the presence of a surfactant as an organic structure-directing agent. Recently, it has been proved that the application of the sonochemical method in the synthesis of nanoporous metal oxides has great effects. This method reduced the time required for such synthesis by many fold and also produced more stable structures with increased surface area. Excellent experimental results for the use of sonochemistry in the synthesis of silica, titania, yittria-stabilized zirconia (YSZ) and Fe2O3 have been achieved. In this article, sonochemical synthesis, characterization and application of nanoporous metal oxides by the surfactant templating method was presented. Finally adsorption-desorption isotherms, pore size distribution and application of SnO2, Fe2O3 and Co3O4 nanoporous metal oxides were compared