Synthesis of PANI/SBA-15 Sorbents for Low Temperature CO2 Adsorption and Effect of Synthesis Parameters on Structural Properties

In this work, mesoporous SBA-15 silica materials were modified by in-situ polymerization method of aniline and polyaniline(PANI)/SBA-15 materials were obtained. The effect of the different amount of SBA-15 and aniline on the textural and chemical properties of PANI/SBA-15 materials was investigated. The synthesized materials were characterized by using X-ray diffraction (XRD), nitrogen adsorption/desorption isotherms, Fourier transform infrared (FTIR), ultraviolet-visible diffuse reflectance (UV-Vis-DRS) spectroscopy analyses and Boehm titration method. XRD patterns showed that the structural properties of SBA-15 were preserved in low aniline amount. It was determined that, surface area, pore volume and pore diameter values decreased with the incorporation of PANI to the structure of SBA-15. FTIR and UV-Vis-DRS analyzes showed that, PANI successfully participates in the SBA-15 structure. It was determined by Boehm titration analyses that the amounts of SBA-15 and aniline significantly affect the basicity of the materials. Considering the structural and chemical properties of the synthesized materials, it is thought to be useful for low temperature carbon dioxide adsorption