| Abstract
| - In this article, we report a systematic investigation on the morphologies of SBA-15 type large-pore periodicmesoporous organosilicas templated by the block copolymer P123. By tuning synthetic parameters such asstirring, acidity, reaction ratio, reaction duration, and autoclaving, a wide spectrum of unique primary particlemorphologies, such as the spindle-, pearl-, diamond-, rod-, and platelike particles, and nanoparticles has beenprepared. These primary particles were found to self-assemble in solution to form various large hierarchicalmacrostructures, such as mesostructured necklaces and cobweb-supported necklaces. The assembling processwas elucidated with the information observed at different stages of reaction. Stirring, reaction duration, andautoclaving were identified to be the key factors affecting the efficiency and degree of the self-assemblyprocess. A nucleation-accretion mechanism for the formation of various PMO primary particles was proposedby examining the relation between the external morphologies and the underlying mesostructure.
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