Facile and controllable preparation of SBA-15 submicron particles

Abstract Based on various conditions to prepare mesoporous silica submicron particles, this study shows that different SBA-15 submicron particles can be prepared in a controlled manner by the partitioned collaborative self-assembly (PCSA) process, and it is unnecessary to use complicated procedures or addition of any reagents. Compared with ordinary SBA-15, the mesoporous silica submicron particles prepared in this paper have the advantages of shorter mesoporous channels and a larger specific surface area. The experimental results show that the before and after additions of TEOS at “8” and “1” and the crystallization temperature of 100°C are the key factors to make the mesoporous silica sub-microparticles. In addition, the mesoporous structure of the mesoporous silica sub-microparticles gradually collapses with the increase of the crystallization temperature above 100°C. When the crystallization temperature reaches 160°C, the specific surface area of the material is sharply reduced by half due to the destruction of the mesoporous structure.