Synthesis of Octylmethoxycinamate-silica Core-shell Nanoparticles with Self-templating Method

Abstract

Abstract: A self-templating method was employed to synthesize core-shell nanoparticles with octylmethoxycinamate(OMC), a well-known organic UV absorber, as core and nanosilica particles as shell. The characteristic of this method is that the whole process requires neither surface treatment for nanosilica particles nor additional surfactant or stabilizer, and all the reactions could be finished in one-pot, which exempts removing template and reduces reaction steps compared to the conventional process. The morphology, structure, particle size distribution, chemical composition and optical property of OMC-SiO₂ nanoparticles were characterized by scanning electron microscopy(SEM), transmission electron microscopy(TEM), dynamic light scattering(DLS), FTIR spectrometry and UV absorption spectrometry, respectively. Experiment results indicate that the resulting OMC-SiO₂ nanoparticles were perfectly spherical with smooth particle surfaces, and had clear core-shell structures. The particle size could be tuned by alte- ring reaction conditions. In addition, the mechanism of the self-templating method for forming core-shell nanoparticles was discussed.

Key words: Nanoparticle, Silica, Octylmethoxycinamate(OMC), Core-shell structure, Self-templating method

ZHANG Qing, LI Rui, ZHAI Yong-ai, LIU Feng-qi and GAO Ge*. Synthesis of Octylmethoxycinamate-silica Core-shell Nanoparticles with Self-templating Method[J]. Chemical Research in Chinese Universities, 2010, 26(3): 339-343.

References

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