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首页> 外文期刊>RSC Advances >Magnetic nano-sized cadmium ferrite as an efficient catalyst for the degradation of Congo red in the presence of microwave irradiation
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Magnetic nano-sized cadmium ferrite as an efficient catalyst for the degradation of Congo red in the presence of microwave irradiation

机译：磁性纳米型镉铁素体作为微波辐射存在下刚果红色降解的有效催化剂

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摘要

A highly active nano-sized CdFe2O4 catalyst was prepared by a hydrothermal process and characterized by X-ray diffraction (XRD), scanning electronic microscopy (SEM), BET specific surface area method, and vibrating sample magnetometer (VSM) at room temperature. Application of the microwave-induced catalytic degradation method in the abatement of Congo red (CR) using the magnetic catalyst was studied. The degradation ratio of CR with CdFe2O4 reached 94.4% with 10 min microwave irradiation (MW), proving CdFe2O4 to be an excellent microwave catalyst. The intermediate products from CR degradation were investigated by UV-Vis, HPLC and ion chromatography. The reaction kinetics, effects of different ion species (SO42-, NO3-, HCO3-, and CH3COO-), pH of the solution, dye initial concentration, dosage of catalyst, as well as degradation mechanism were comprehensively studied. Radical trapping studies and the fluorescence technique revealed the holes (h(+)) and hydroxyl radicals ((OH)-O-center dot) were involved as the main active species in the reaction. The band structure of CdFe2O4 was analyzed by UV-Vis diffuse reflectance spectroscopy and Mott-Schottky measurements. The mechanism of the degradation was discussed in detail. This work can provide an effective technology for dye wastewater treatment.
机译：通过水热法制料制备高活性的纳米尺寸CDFE2O4催化剂，其特征在于X射线衍射（XRD），扫描电子显微镜（SEM），BET比表面积法，并在室温下振动样​​品磁力计（VSM）。微波诱导的催化降解法在使用磁性催化剂中施加在刚果红（Cr）的削减中。用10分钟的微波辐射（MW），Cr CdFe2O4的Cr的降解比达到94.4％，证明CDFE2O4是优异的微波催化剂。通过UV-VI，HPLC和离子色谱研究来自Cr降解的中间产物。综合研究了反应动力学，不同离子物种（SO42，NO3-，HCO3-和CH 3 CO 3 - 和CH 3 CO 3-）的影响，染料初始浓度，催化剂剂量的pH以及降解机理。自由基捕获研究和荧光技术揭示了孔（H（+））和羟基自由基（（OH）-O中心点）作为反应中的主要活性物质。通过UV-Vis弥射反射光谱和Mott-Schottky测量分析CDFe2O4的带结构。详细讨论了降解的机制。这项工作可以为染料废水处理提供有效的技术。

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  • 来源
    《RSC Advances》 |2015年第63期|共8页
  • 作者

    Shi Wen; Liu Xueyan; Zhang Tingting; Wang Qiong; Zhang Lei;

  • 作者单位

    Liaoning Univ Coll Chem Shenyang 110036 Peoples R China;

    Liaoning Univ Coll Chem Shenyang 110036 Peoples R China;

    Liaoning Univ Coll Chem Shenyang 110036 Peoples R China;

    Liaoning Univ Coll Chem Shenyang 110036 Peoples R China;

    Liaoning Univ Coll Chem Shenyang 110036 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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