Facile synthesis of 2D single-phase Ni0.9Zn0.1O and its application in decolorization of dye
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A novel single-phase Ni0.9Zn0.1O was synthesized by using a simple hydrothermal method. The crystal structure, morphology and element distribution have been analyzed by X-ray diffraction, transmission electron microscopy and EDS mapping. The results showed that 2D graphene-like and porous structure was successfully grown on the surface of Ni0.9Zn0.1O. The single-phase Ni0.9Zn0.1O was further applied to remove Congo red (CR), which was used as a model of organic pollutants in aqueous solution. Unexpectedly, it is found that the graphene-like single-phase Ni0.9Zn0.1O has the superior adsorption capacity for CR in aqueous solution. The adsorption isotherms and kinetics follow Langmuir and pseudo-second order models, respectively. This study provides great promise of as-prepared Ni0.9Zn0.1O powders as absorbent for removal of organic dyes.
Financial support was provided by National Natural Science Foundation of China (Nos. 50771082, 60776822). The Project Supported by Natural Science Basic Research Plan in Shaanxi Province of China (Program No. 2017JQ5116).
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