In this letter, the changes of aluminum content, acid amount and catalytic properties of AlMCM-41 after treatment by NaAlO2 in the presence/absence of cetyltrimethylammonium bromide (CTAB) were studied. The samples we...In this letter, the changes of aluminum content, acid amount and catalytic properties of AlMCM-41 after treatment by NaAlO2 in the presence/absence of cetyltrimethylammonium bromide (CTAB) were studied. The samples were characterized by XRD, N2 adsorption-desorption isotherm, 27Al MAS NMR and NH3-TPD. Characterization results revealed that the introduction of CTAB during the modification process played a crucial role in the adjustment of surface properties of AlMCM-41 including distribution of aluminum atoms and acid site numbers, otherwise the original ordered AlMCM-41 would be completely destroyed.展开更多
基金Beijing Natural Science Foundation(2052009)Funding Project for Academic Human Resources Development in Institutions of Higher Learning Under the Jurisdiction of Beijing Municipality(PHR200907129)
文摘In this letter, the changes of aluminum content, acid amount and catalytic properties of AlMCM-41 after treatment by NaAlO2 in the presence/absence of cetyltrimethylammonium bromide (CTAB) were studied. The samples were characterized by XRD, N2 adsorption-desorption isotherm, 27Al MAS NMR and NH3-TPD. Characterization results revealed that the introduction of CTAB during the modification process played a crucial role in the adjustment of surface properties of AlMCM-41 including distribution of aluminum atoms and acid site numbers, otherwise the original ordered AlMCM-41 would be completely destroyed.
