Preparation of high thermal stability MCM-41 in the low surfactant/silicon molar ratio synthesis systems

The direct and highly efficient synthesis route to the high thermal stability MCM-41 whose porosity structure can be retained even after thermal treatment at 1273 K in air is presented. The preparation of a mesoporous molecular sieve MCM-41 both with bimodal framework and textural mesopores and with high thermal stability that results from a thicker all was achieved by decreasing surfactant/silicon ratio of synthesis gel. The resultant material retains porosity and large BET surface area even after thermal treatment at 1273 K for 1 h in air.