Abstract
Abstract Pure and Fe modified tetrapod-shaped ZnO whiskers with various Fe concentrations have been synthesized by a simple thermal evaporation method. The structure, morphology, photocatalytic and photoluminescence properties of the samples are investigated. X-ray diffraction (XRD) patterns show that pure and 1% Fe modified samples possess a wurtzite hexagonal crystal structure without any second phase. When the modifying level increases, additional two weak diffraction peaks corresponding to Fe2O3 and ZnFe2O4 are observed. Scanning electron microscopy (SEM) measurement exhibits that all samples have tetrapod-like whisker structure, when modified with Fe, there are several small tips and particles attached to the arm. The photocatalytic tests show that 1% Fe modified tetrapod-shaped ZnO whisker has the best photocatalytic activity in degradation of Rhodamine B (RhB). The luminescence properties show that all samples have ultraviolet emission at 381 nm, weak violet emission and broad green–yellow emission band, the emission mechanisms are discussed in detail.
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