초록 |
Mesoporous Ce-Mn-MCM-41 molecular sieves with Si/(Ce+Mn) molar ratio of 43, 61, 79, and 97 were synthesized under hydrothermal conditions using cetyltrimethylammonium bromide as surfactant, manganese acetate and cerium sulfate as source of manganese and cerium. The mesoporous materials were characterized by using several techniques, such as X-ray Diffraction, Fourier Transform Infra-Red Spectroscopy, N2 physisorption, Thermogravimetric/Differential Thermal Analysis and Scanning Electron Microscopy. |