Size-controllable (Cu-ZnO)@C core-shell nanoparticles having diameters of 7-20 nm were prepared by carbonization of Cu2+- and Zn2+-CD (Cu/Zn ratio=0.1-1) at 573 K for 2 h. By XRD, the major compounds in the (Cu-ZnO)@C core-shell nanoparticles are metallic copper (Cu) and ZnO. Cu2O is not observed. The TEM images indicate that the core Cu in the (Cu-ZnO)@C core-shell nanoparticles has crystalline sizes of 7-20 nm, which are similar to the observations by in situ synchrotron small angle X-ray scattering spectroscopy. After the etching of Cu from (Cu-ZnO)@C, the diameters of Cu are decreased to 3-14 nm. X-ray absorption near edge structure spectra of Cu in the (Cu-ZnO)@C core-shell and yolk-shell nanoparticles indicate the existence of Cu and ZnO. These yolk-shell nanoparticles possessing the function of nanoreactors can be used in, for example, photocatalytic reduction of CO2 and H2O.

Preparation of (Cu-ZnO)@C core- and yolk-shell nanoparticles

251st National Meeting (2016)

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