Method of preparing mesoporous silica particles using spray pyrolysis

摘要

Disclosed is a method of preparing mesoporous silica particles. The method includes (a) preparing an aqueous silicic acid, (b) spraying the aqueous silicic acid in a droplet state by activating the aqueous silicic acid, and (c) pyrolyzing the sprayed droplet through a reactor, which is previously heated, by allowing the sprayed droplet to pass through the reactor together with a carrier gas. The aqueous silicic acid includes 0.4 M to 0.8 M of silicic acid.

主权项

1. A method of preparing mesoporous silica particles, the method comprising:
(a) preparing an aqueous silicic acid; (b) spraying the aqueous silicic acid in a droplet state by activating the aqueous silicic acid; and (c) pyrolyzing the sprayed droplet through a reactor, which is previously heated at a temperature of 550° C. to 850° C., by allowing the sprayed droplet to pass through the reactor together with a carrier gas to prepare the mesoporous silica particles with a 3.8nm main pore, wherein the aqueous silicic acid includes 0.4 M to 0.8 M of silicic acid, the aqueous silicic acid further includes urea as an expansion aid, the urea having a concentration of 2 M based on 1 M of the aqueous silicic acid.