Synthesis and characterization of silicon and cobalt substituted mesoporous aluminophosphates

A variety of silicon and cobalt substituted mesoporous aluminophosphate mat erials with different incorporated contents were prepared in the presence o f supramolecular template alkyltrimethylammonium cations. The characterizat ion of these solid products by various techniques such as XRD, N-2 adsorpti on, DRS, and Al-27, P-31 MAS NMR spectroscopies has been carried out to und erstand the local atomic arrangements and the coordination environment. Si and Co can be introduced into the framework of aluminophosphate-based mesop orous materials, respectively. About 41 wt.% of the templating surfactant c an be extracted by acid alcohol, however this treatment can not efficiently enhance the thermal stability of these products. (C) 2001 Elsevier Science B.V. All rights reserved.