Fe-doped ZnO Nanorods Research Articles

Vertically aligned Fe-doped ZnO nanorod arrays by ultrasonic irradiation and their photoluminescence properties

A facile sonochemical route was demonstrated for the direct fabrication of Fe-doped ZnO nanorod arrays on a Si substrate under ambient conditions. By adding Fe 3+ ions in reaction solution, Fe is readily in situ doped into ZnO nanorod arrays via ultrasound irradiation. The morphology and structural characteristic of the Fe-doped ZnO nanorods were investigated using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). And crystal structure was characterized by X-ray diffraction (XRD) spectroscopy. Inductively-coupled plasma atomic emission spectroscopy (ICP-AES) confirmed the Fe-doping of ZnO nanorod arrays with a concentration of 0.9 wt.%. In addition, Fe-doped ZnO nanorod showed the enhancement of photoluminescence (PL) intensity in green–yellow emission.

Magnetic and photocatalytic effect of Fe‐doped nano‐rod ZnO synthesized by the hydrolysis of metal powders

AbstractFe‐doped ZnO nano‐rods have been simply synthesized by a hydrolysis method. The starting Zn and Fe nano‐powders were incorporated into distilled water, and then the solution was refluxed at 60 °C for 24 h to obtain the precipitation of hydroxide gel from the hydrolysis of Zn and Fe. Finally the thermal treatment was carried out at 300 °C for 1 h. X‐ray diffraction patterns for all samples exhibited that the resultant precipitates were completely ZnO powder. The TEM result for Fe‐doped ZnO showed rod shape with diameter of 30nm and length of 300nm. With increasing Fe content up to 2 wt.%, the UV‐vis spectra were shifted to the long wave length and this result indicates that the band gap was shifted by Fe‐doping. Whereas the sample with 5wt.% Fe‐doping showed the ferromagnetic behavior at room temperature, the ferromagnetic properties disappeared at the samples with above 5 wt% Fe‐doping. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Novel Synthesis of Nanorod ZnO and Fe-Doped ZnO by the Hydrolysis of Metal Powders

Fe-doped ZnO nanorods have been synthesized by a novel process employing a hydrolysis of metal powders. Zn and Fe nano-powders were used as starting materials and incorporated into distilled water. The solution was refluxed at 60 °C for 24 h to obtain the precipitates from the hydrolysis of Zn and Fe. X-ray diffraction patterns for all the samples showed a pure wurtzite single phase, without any segregation of the Fe into the particulates within the instrumental resolution limit. The TEM results for ZnO with and without an Fe-doping showed that the produced powders had a rod-like shape. The rod shape was attributable to the zinc oxide from the hydrolysis of Zn. With an increasing Fe content, the UV–vis spectra were shifted to a long wave length and this result indicates that the band gap was changed by an Fe-doping.

Novel Synthesis of Nanorod ZnO and Fe-Doped ZnO by the Hydrolysis of Metal Powders

Fe-doped ZnO nanorods have been synthesized by a novel process employing a hydrolysis of metal powders. Zn and Fe nano-powders were used as starting materials and incorporated into distilled water. The solution was refluxed at 60 degrees C for 24 h to obtain the precipitates from the hydrolysis of Zn and Fe. X-ray diffraction patterns for all the samples showed a pure wurtzite single phase, without any segregation of the Fe into the particulates within the instrumental resolution limit. The TEM results for ZnO with and without an Fe-doping showed that the produced powders had a rod-like shape. The rod shape was attributable to the zinc oxide from the hydrolysis of Zn. With an increasing Fe content, the UV-vis spectra were shifted to a long wave length and this result indicates that the band gap was changed by an Fe-doping.

Improvement of the optical properties of ZnO nanorods by Fe doping

Fe-doped ZnO nanorods were prepared using an in situ low-temperature hydrothermal synthesis. Fe-doped ZnO nanorods synthesized in the solution containing 30 mM of (CH 3CO 2) 2Fe exhibited a 40% increased I UV/ I DLE ratio compared to undoped ZnO nanorods. Oxygen deficiencies were significantly reduced with Fe doping in ZnO nanorods, and Fe was incorporated in ZnO nanostructure in a Fe 3+-like state. It is suggested that the addition of Fe 3+ into a ZnO nanostructure disturbs the recombination of electrons and holes by bonding with electrons in singly ionized oxygen vacancies. Consequently, green emission is reduced and the optical properties of ZnO nanorods are improved.