The synthesized catalyst was characterized by Fourier transform infrared spectra, X-ray diffraction, energy-dispersive X-ray spectroscopy, UV–Vis–NIR diffuse reflectance spectroscopy, transmission electron microscopy, BET surface area, zeta potential, and field emission scanning electron microscopy. In the current study, core–shell structured catalyst was synthesized for photocatalytic degradation of phenol from aqueous samples. Importantly, the photocatalytic activity of ZnO NPs is eliminated thoroughly by the silica shell, which apparently improves the UV aging resistance of polymer (EC), enabling the applications of ZnO as durable and environmental friendly UV blocker in transparent plastics and coatings to extend the lifetime of the products. The as-prepared nanocomposites shield all the UV light completely under 350 nm and maintain the transparency of pure EC even the solid content reaches 60 parts per hundred of EC resin by weight (phr). The NPs with an average size of 12 nm have an obvious core–shell structure and show excellent monodispersity in toluene. This article reports a novel reverse microemulsion combined with surface modification method for the synthesis of monodispersed silica-coated ZnO NPs, which are introduced into ethocel (EC) matrix to fabricate the transparent nanocomposites by the solution-mixing method. However, it is still a challenge to synthesize core–shell structure NPs with small particle size and good dispersity, and difficult to maintain the transparency of the nanocomposites because of Rayleigh scattering caused by the big size or the aggregation of NPs. Due to the photocatalytic activity of ZnO, core–shell structure nanoparticles (NPs) have been used to fabricate the transparent polymer-based nanocomposites. Transparent ZnO/polymer nanocomposites with good UV shielding performance have shown great potential applications.
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