Synthesis of a mesoporous silica hollow microsphere using polyvinyl alcohol

A mesoporous silica hollow microsphere was synthesized in the presence of polyvinyl alcohol for the first time. The synthesized material was characterized by various instrumental techniques such as small-angle X-ray scattering, scanning electron microscopy, transmission electron microscopy, N2 adsorption measurement and Fourier transform infrared spectroscopy. I have succeeded in incorporating an Ultraviolet ray absorber, 2, 2´, 4, 4´ tetrahydroxy benzophenone by mixing it after synthesis. However an attempt to incorporate by mixing before synthesizing it changes the morphology. In addition to polyvinyl alcohol, the use of other polymers such as polyvinyl pyrrolidine and polyethylene glycol also changes the morphology into dry leaves or fibers.