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Abstract
Magnetically separable Zn1−xCdxS/γ-Fe2O3 (x=0–1) photocatalysts were synthesized by a one-step combustion method. The structures, morphologies, absorbance, optical and photocatalytic properties of the samples were studied by X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, ultraviolet–visible spectrophotometry and photoluminescence. The experimental results show that the formation of hexagonal Zn1−xCdxS and γ-Fe2O3 and the combination of them were one-pot achieved. The Cd2+ content has a significant influence on the absorbance of visible light and fluorescence properties. The magnetic properties of samples ensure the magnetic separation by using a magnet. CdS/γ-Fe2O3 shows the best photocatalytic performance compared with other samples, ascribed to its small energy band gap and matching energy band structure between CdS and γ-Fe2O3. Moreover, no obvious deterioration was observed in the stability tests.
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