| 초록 |
Polyethyleneimine (PEI) modified mesoporous silicate MCM-41 (MCM-41-PEI), MCM-48(MCM-48-PEI) and SBA-15 (SBA-15-PEI) was prepared by a wet impregnation method for the adsorption of CO2. The samples were characterized by XRD, FT-IR, TEM, and nitrogen adsorption/desorption isotherms. It was found that the PEI was uniformly dispersed into the channels of the molecular sieve MCM-41, MCM-48 and SBA-15. The adsorption uptake was measured at (343.15, 353.15, 363.15 and 373.15) K using thermogravimetric analysis. The adsorption capacity of MCM-41-PEI was significantly greater than that of MCM-41. In the addition, The surface modified mesorpous materials obtained in this work can be successfully applied for the many industrial fields such as memory media, sensor, catalysts, membrane, gas storage and supports. In addition, it was found that the integral adsorption isotherm model was highly useful for the design, modification and surface heterogeneity analysis of mesoporous materials for CO2 adsorption. |
