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Combustion synthesis and photocatalytic properties of magnetically separable Zn1−xCdxS/γ-Fe2O3 composites
Ist Teil von
Materials letters, 2014-09, Vol.130, p.94-96
Ort / Verlag
Elsevier B.V
Erscheinungsjahr
2014
Link zum Volltext
Quelle
Elsevier ScienceDirect Journals Complete
Beschreibungen/Notizen
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.
•Zn1−xCdxS/γ-Fe2O3 composites were prepared by the one-step combustion method.•The composites showed excellent visible-light photocatalytic property.•The composites can be easily magnetically collected by using a magnet.•The plausible mechanism of photodegradation was discussed.