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Solvothermal synthesis and magneto-optical properties of Zn1−xNixO hierarchical microspheres |
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| Authors: | Zhifu LiuQinghong Zhang Guoying ShiYaogang Li Hongzhi Wang |
| Affiliation: | a State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, People’s Republic of China b College of Materials Science and Engineering, Donghua University, Shanghai 201620, People’s Republic of China c College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, People’s Republic of China |
| Abstract: | Zn1−xNixO (x=0-0.25) hierarchical microspheres were synthesized via a solvothermal process in ethylene glycol. The magnetic microspheres were characterized by X-ray powder diffraction, field-emission scanning electron microscopy, energy-dispersive X-ray spectra, X-ray photoelectron spectroscopy, room-temperature photoluminescence spectra, and vibrating sample magnetometer. The as-prepared samples take on a well-defined spherical architecture following the processes of spontaneous aggregation and localized Ostwald ripening. Dependence of the magnetization and morphology on Ni2+ content was observed. Magnetic hysteresis loops reveal that the Ni-doped ZnO microspheres exhibit ferromagnetic loops at room temperature. |
| Keywords: | Diluted magnetic semiconductors Solvothermal synthesis Optical properties Magnetic measurements. |
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