Green synthesis and characterisation of ZnMn 2 O 4 nanoparticles for photocatalytic degradation of Congo red dye and kinetic study

Micro & nano letters

article

Saeid Taghavi Fardood¹  Farzaneh Moradnia¹  Ali Ramazani¹ 

[1] Department of Chemistry, University of Zanjan;Research Institute of Modern Biological Techniques (RIMBT), University of Zanjan

关键词: X-ray diffraction;    ultraviolet spectra;    zinc compounds;    scanning electron microscopy;    sol-gel processing;    crystallites;    visible spectra;    nanoparticles;    transmission electron microscopy;    dyes;    nanofabrication;    photocatalysts;    field emission scanning electron microscopy;    Fourier transform infrared spectra;    photocatalytic degradation;    tragacanth gel;    sol–gel method;    zinc manganite nanoparticles;    transmission electron microscopy;    field emission scanning electron microscopy;    diffuse reflectance spectroscopy;    spinel tetragonal structure;    synthesised nanoparticles;    Congo red dye degradation;    spinel nanoparticles;    total organic carbon removal;    spinel photocatalyst;    aqueous solution;    UV–Vis spectroscopy;    XRD pattern;    Fourier transform infrared spectroscopy;    X-ray powder diffraction;    high photocatalytic activity;    time 15.0 min;    temperature 293 K to 298 K;    ZnMn2O4;   

DOI  :  10.1049/mnl.2019.0071

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

In this work, ZnMn 2 O 4 spinel nanoparticles were successfully synthesised by tragacanth gel through the easy and inexpensive novel sol–gel method. This technique has many strong points such as facile, economical, non-toxic and quickness in comparison with other methods. The zinc manganite nanoparticles were characterised by X-ray powder diffraction (XRD), transmission electron microscopy, field emission scanning electron microscopy, Fourier transform infrared spectroscopy and diffuse reflectance spectroscopy. The XRD pattern confirmed the formation of spinel tetragonal structure of ZnMn 2 O 4 nanoparticles with a crystallite size of 14 nm. The degradation of Congo red dye by synthesised nanoparticles was studied using employing UV–Vis spectroscopy. The ZnMn 2 O 4 NPs expressed high photocatalytic activity for degradation of Congo red dye at room temperature in aqueous solution so that 96% of Congo red was degraded in 15 min. The spinel ZnMn 2 O 4 photocatalyst provided total organic carbon removal as 45.2% in 15 min. The spinel ZnMn 2 O 4 NPs reusability was examined by administering the degradation of Congo red dye with the spent catalyst and it was considered that the photocatalyst did not exhibit any significant reduction in its activity even after three cycles.

【 授权许可】

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