Synthesis and Characterization of Hollow Silica via PMMA as Template
Submicrosized porous hollow silica spheres with a diameter of 350 nm and a shell thickness of approximately 10 nm were synthesized by a hydrothermal method using PMMA hollow particles as template. Through the hydrolysis of TEOS, a continuous and uniform coating of SiO2 was deposited over the surface of PMMA cores to form the core-shell structures. After calcining to remove the template, a pure hollow silica structure with holes in the shells was obtained. The as-prepared hollow products were characterized with TEM, SEM, EDS, BET and FT-IR. Its large surface area and hollow morphology will make this new material a promising agent for the applications of catalysts, controlled drug delivery and etc.
Masayuki Nogami, Riguang Jin, Toshihiro Kasuga and Wantai Yang
J. R. Song et al., "Synthesis and Characterization of Hollow Silica via PMMA as Template", Advanced Materials Research, Vols. 11-12, pp. 551-554, 2006