Green synthesis of graphene oxide-MnFe 2 O 4 composites and their application in removing heavy metal ions

Micro & nano letters

article

Fangli Liao¹  Guiqiang Diao¹  Hao Li¹ 

[1] School of Chemistry and Materials Engineering, Huizhou University

关键词: X-ray diffraction;    scanning electron microscopy;    Raman spectra;    oxidation;    cadmium;    X-ray photoelectron spectra;    lead;    nanofabrication;    suspensions;    spectrochemical analysis;    copper;    adsorption;    wastewater treatment;    Fourier transform infrared spectra;    green synthesis;    heavy metal ions;    green strategy;    X-ray diffraction;    Fourier transform infrared spectroscopy;    X-ray photoelectron spectroscopy;    aqueous solution;    adsorption process;    graphene oxide-manganese ferrites;    Hummers method;    pseudo-second-order model;    Langmuir isotherm;    Langmuir model;    temperature 318.0 K;    MnFe2O4-CO;    Pb;    Cu;   

DOI  :  10.1049/mnl.2018.5640

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

The composites of graphene oxide (GO) decorated by MnFe 2 O 4 have been synthesised via a green and facile strategy that the pristine GO/MnSO 4 suspension prepared by Hummers method was directly utilised to convert into the GO-MnFe 2 O 4 composites. The as-prepared composites were characterised using X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, Raman spectra and X-ray photoelectron spectroscopy. The results indicated that the GO-MnFe 2 O 4 composites were successfully synthesised. The removal behaviours of Pb 2+ and Cu 2+ onto GO-MnFe 2 O 4 were investigated, which indicated that the composites exhibited great adsorption property in aqueous solution. The adsorption process could be fitted well by the pseudo-second-order model and Langmuir isotherm. The thermodynamic studies indicated that the adsorption process of Pb 2+ and Cu 2+ onto GO-MnFe 2 O 4 composites was spontaneous and endothermic in nature. Furthermore, the maximum adsorption capacities for Pb 2+ and Cu 2+ calculated from Langmuir model were about 263.85 and 103.41 mg/g at 318 K, respectively. Based on the results from the reusability experiments, the as-prepared GO-MnFe 2 O 4 composites could be used as a potential adsorbent for removing Pb 2+ and Cu 2+ ions from aqueous solutions.

【 授权许可】

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