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Yolk-shell ZnO microsphere–graphene composites (YZM–G) were synthesized by a facile one-pot route, The yolk-shell ZnO microsphere, with ZnO nanoparticles as core and ZnO nanodisks as shell, has an average diameter of 3μm. The formation of the ZnO nanoparticles as core was ascribed to the controlling of the concentration of free Zn 2+ ions in the solution caused by the graphene oxide, and the...
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