Abstract: A combustion synthesis method was adapted for the efficient preparation of pure zinc ferrite particles (ZnFe₂O₄). It is based on the exothermic reaction of the corresponding metal nitrates with a reducing agent, to produce extremely fine-grained ashes that readily convert into pure ZnFe₂O₄ with treating thermally. The composition and microstructure of the so-obtained samples were studied by XRD (X-ray powder diffraction), TEM (Transmission Electron Microscopy) and AFM (Atomic Force Microscopy). These results showed that the range of particle size of ZnFe₂O₄ is about 15-25 nm. Photocatalytic activities of nanometer ZnFe₂O₄ were also evaluated by degradation of the curcumin solution.