A universal method was utilized to fabricate rhombic dodecahedral zeolitic imidazolate framework-8@SiO2 (ZIF-8@SiO2) nanoparticles (NPs) and their derivatives, ZnO@SiO2, ZIF-8@SiO2 yolk–shell and SiO2 hollow NPs, using ZIF-8 NPs as the template.
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Liu et al. (2014) studied this question.