Pore structure analysis of the mesoporous titanosilicate molecular sieve MCM-41 by H-1 NMR and N-2 sorption

The pore structure of the titanosilicate mesoporous molecular sieve [Si,Ti]-MCM-41 has been examined by N-2 sorption and H-1 NMR. Pore sizes determined by both methods are in good agreement. Titanosilicate MCM-41 has a broader pore size distribution than the purely siliceous material, and the diameter of its pores is larger. The thickness of the pore walls, calculated by subtracting the pore diameter from the unit cell parameter, increases with the incorporation of titanium into the framework.