Abstract
The purpose of this research is to study the dye removal and carbon dioxide capture by mesoporous silica. In this work, the textual and structural properties of all prepared materials are characterized by inductively coupled plasma-mass spectrometer (ICP-MS), powder X-ray diffraction (XRD) patterns, nitrogen physisorption isotherms, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). In the beginning, highly ordered mesoporous silica, Santa Barbara Amorphous-15 (SBA-15), and titanium-substituted mesoporous silica (TiSBA-15) materials were synthesized, characterized, and evaluated. In terms of adsorption properties, the performance is examined by adsorption of dyes on SBA-15 and TiSBA-15 materials which are validated to be effective adsorbents for cationic dyes. In terms of photocatalytic properties, the performance is examined by photocatalytic degradation of dyes on TiSBA-15. It’s indicated that TiSBA-15 possess the synergistic effect of adsorptive and photocatalytic ability. The regeneration and cyclic performance is also prospective. These results revealed that TiSBA-15 has much potential to be one effective alternative material for dye removal. Furthermore, platinum and cerium ions are photodeposited onto TiSBA-15 powders in order to improve photocatalytic performance or induce radio-sensitive effect in the degradation of dye. On the other hand, calcium ions are dispersed onto mesoporous silica using impregnation method. The thermo-gravimetric analysis is used to test the performance of carbon dioxide capture using prepared calcium-based sorbents. The property and carbon dioxide sorption ability of the substrates and sorbents are examined and discussed. It is demonstrated that carbon dioxide can be effectively adsorbed, concentrated, and separated using the reasonable reaction paths. The long-term durability of prepared sorbents is also confirmed by carbon dioxide sorption/desorption cycle test under high temperature.