Preliminary Findings on CO2 Capture over APTES-Modified TiO2

In this work, the impact of TiO2 properties on the CO2 adsorption properties of titanium dioxide modified with 3-aminopropyltriethoxysilane (APTES) was presented. The APTES-modified TiO2 materials were obtained by solvothermal process and thermal modification in the argon atmosphere. The prepared adsorbents were characterized by various techniques such as X-ray diffraction (XRD), Fourier transform infrared (DRIFT), thermogravimetric analysis and BET specific surface area measurement. CO(2)adsorption properties were measured at different temperatures (0, 30, 40, 50 and 60 degrees C). Additionally, the carbon dioxide cyclic adsorption-desorption measurements were also investigated. The results revealed that modifying TiO2 with APTES is an efficient method of preparing CO2 sorbents. It was found that the CO2 adsorption capacity for the samples after modification with APTES was higher than the sorption capacity for unmodified sorbents. The highest sorption capacity reached TiO2-4 h-120 degrees C-100 mM-500 degrees C sample. It was also found that the CO2 adsorption capacity shows excellent cyclic stability and regenerability after 21 adsorption-desorption cycles.

Automated summary

This study presents the impact of TiO2 properties on the CO2 adsorption properties of TiO2 modified with APTES. The APTES-modified TiO2 materials were prepared by solvothermal process and thermal modification. The results showed that APTES modification is an efficient method for preparing CO2 sorbents with higher adsorption capacity and excellent cyclic stability.