Preparation and characterisation of two-dimensional magnetic chitosan nanosheets for removal of azo dyes from aqueous solutions

Micro & nano letters

article

Xiuying Peng¹  Wanxin Jia¹  Dongtao Lu¹  Qiao Zhang¹  Cheng Yang¹  Shaomin Shuang¹  Yujing Guo¹  Chuan Dong¹ 

[1] Institute of Environmental Science, Shanxi University

关键词: magnetic separation;    pH;    X-ray diffraction;    transmission electron microscopy;    thermal analysis;    adsorption;    dyes;    nanofabrication;    nanomagnetics;    scanning electron microscopy;    Fourier transform infrared spectra;    polymers;    liquid phase deposition;    reaction rate constants;    two-dimensional magnetic chitosan nanosheets;    aqueous solutions;    azo dye adsorption;    simple hydrothermal method;    transmission electron microscopy;    thermogravimetric analysis;    vibrating sample magnetometer;    dye adsorbent;    solution pH;    adsorption isotherm;    adsorption kinetics;    rapid magnetic separation;    azo dye removal;    scanning electron electron microscopy;    Fourier transform infrared spectroscopy;    methyl orange;    amido black;    adsorbent dosage;    Freundlich model;    pseudosecond-order model;   

DOI  :  10.1049/mnl.2018.5340

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

In this work, two-dimensional magnetic chitosan nanosheets (CSMNSs) for azo dye adsorption were successfully synthesised by a simple hydrothermal method. The as-prepared CSMNSs was characterised by scanning electron microscope, transmission electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis and vibrating sample magnetometer. Then, the CSMNSs as the dye adsorbent were applied to the removal of two kinds of azo dyes (methyl orange and amido black). The effect of solution pH and adsorbent dosage, adsorption isotherm, adsorption kinetics and the reusability of CSMNSs were examined. Adsorption isotherms obeyed Freundlich model and adsorption kinetics was described as pseudo-second-order model. Furthermore, the CSMNSs have the advantage of simple synthesis route, high absorption efficiency, rapid magnetic separation from aqueous solutions and excellent reusability. The CSMNSs as the dye adsorbent was applied to removal of azo dyes with broad prospects.

【 授权许可】

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