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

Abstract

Fe-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.

Ferromagnetic behaviour of Fe-doped ZnO nanograined films

“…It was used for the samples obtained by sintering of conventional [30,37,44,48–52 54–55 58,64] or nanopowders [24,29,32,41–42 46,53,56,59,65–66], or for films obtained by sol–gel method, pyrolysis, CVD or PLD [22–23 25,27–28 45]. If the samples mentioned in the analysed papers were not poreless, such as in the partly sintered powders (open and filled diamonds) [29,32,37,44,50,52–53 56,59,62,65], nanorods, or nanowires (open and filled down-triangles) [34,43,57,61], we introduced the additional porosity coefficient, p , for the s GB . p varies from 0 for nonsintered powders to 1 for the fully compacted polycrystals.…”

Recent progress on doped ZnO nanostructures for visible-light photocatalysis

“…Ferromagnetic properties of Fe-doped ZnO nanostructures is another interesting issue which enable doped products gather by simple magnetic routes from aqueous solutions after the photo-degradation process [135,137]. Another important property of Fe dopant is different oxidation states, namely Fe 2+ , Fe 3+ and Fe 4+ [19,95,133,135].…”

Observation of spin-splitting energies on sp–d exchange interactions tailored in colloidal CdSe/CdMnS core/shell nanoplatelets: an atomistic tight-binding model

“…Among them, the most popular are II-VI semiconductors including CdTe, CdSe, CdS, and ZnSe, with Mn magnetic ions. Magnetic-ion dopants have been successfully realized for colloidal zero-dimensional (0D), [6][7][8] one-dimensional (1D) [9][10][11] and two-dimensional (2D) nanomaterials. [12][13][14] Compared to 0D and 1D nanomaterials, 2D nanomaterials with highly anisotropic geometry display superior and striking properties, including narrow emission bands, 15 enormous oscillator strengths [16][17][18] and suppressed auger recombination rates.…”