MCM-41 based materials are currently under intense studies with respect to their utility as adsorbents,possible catalysts,supports,and molecular hosts.A series of mesoporous In-MCM-41 molecular sieves (Si/In ratio from 5 to 120) in their hydrogen and sodium form have been synthesized using indium nitrate as source of indium.The obtained material were characterized in detail by XRD,~(115)In-MAS-NMR spectroscopy,nitrogen adsorption-desorption experiments,and temperature programmed desorption.The XRD and nitrogen adsorption measurements demonstrate that indium can be incorporated into the MCM-41 structure down to a Si/In ratio of about 10.The structure of the MCM-41 totally collapses with a further increasing amount of indium in the gel.
展开▼
