In this contribution, we propose a novel method combined the advantages of the St�ber�s method with the homogenous precipitation. A key feature of the synthetic strategy is use of urea as a substitute for commonly used NaOH or NH4OH under reflux condition. The product possesses well-ordered mesoporous structure, narrow pore size distribution, particle size of ca. 100-500 nm and high monodispersity and spherical morphology. Compared the present reported method, the yield of product can be increased to about 8 times based on the same solution volume. The nanoparticle solutions are very stable with lifetimes of more than one month without indication of agglomeration. The results show the present method is suitable as a direct synthesis route to monodisperse mesoporous silica nanoparticles on a large scale. The size of nanoparticle could be tuned in controlled manner depended on the preparation parameters.

Novel synthesis of the monodisperse mesoporous silica nanoparticles under reflux condition

243rd National Meeting (2012)

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