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改进水热法合成纳米CoxFe3-xO4(0≤x≤2)及其对刚果红染料的吸附性能

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张子元, 王寅岗. 改进水热法合成纳米CoxFe3-xO4(0≤x≤2)及其对刚果红染料的吸附性能[J]. 环境工程学报, 2017, 11(2): 899-907. doi: 10.12030/j.cjee.201510019
引用本文: 张子元, 王寅岗. 改进水热法合成纳米CoxFe3-xO4(0≤x≤2)及其对刚果红染料的吸附性能[J]. 环境工程学报, 2017, 11(2): 899-907. doi: 10.12030/j.cjee.201510019
shu
ZHANG Ziyuan, WANG Yingang. Adsorption performance of Congo red on CoxFe3-xO4 (0≤x≤2) nanoparticles synthesized by improved hydrothermal method[J]. Chinese Journal of Environmental Engineering, 2017, 11(2): 899-907. doi: 10.12030/j.cjee.201510019
Citation: ZHANG Ziyuan, WANG Yingang. Adsorption performance of Congo red on CoxFe3-xO4 (0≤x≤2) nanoparticles synthesized by improved hydrothermal method[J]. Chinese Journal of Environmental Engineering, 2017, 11(2): 899-907. doi: 10.12030/j.cjee.201510019
shu

改进水热法合成纳米CoxFe3-xO4(0≤x≤2)及其对刚果红染料的吸附性能

  • 1.

    南京航空航天大学材料科学与技术学院, 南京 210016

  • 基金项目:

    江苏省工业和大学联合创新基金（BY2013003-01）

    江苏高校优势学科建设工程资助项目（PAPD）

Adsorption performance of Congo red on CoxFe3-xO4 (0≤x≤2) nanoparticles synthesized by improved hydrothermal method

  • 1.

    College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

  • Fund Project:

  • 摘要: 采用快速水热法制备了纯相CoxFe3-xO4（0≤x≤2）纳米颗粒，并对样品进行了XRD、EDX、FTIR、SEM、N2吸附-脱附以及VSM表征，研究了Co含量、初始浓度和pH值对水中刚果红吸附性能的影响。实验结果表明，Co1.6Fe1.4O4纳米颗粒具有最大的比表面积170.1 m2·g-1和最好的吸附性能，在pH=3，初始浓度为200 mg·L-1时，饱和吸附容量达到475 mg·g-1。对CoxFe3-xO4进行了吸附过程动力学和热力学分析，该吸附过程符合准二级动力学模型，根据Langmuir等温吸附模型计算得出最大吸附容量为370.4 mg·g-1。良好的磁性能使Co1.6Fe1.4O4纳米颗粒很容易从水中分离再利用，实验表明，经过多次脱附/吸附过程，Co1.6Fe1.4O4纳米颗粒对刚果红仍具有良好的吸附性能。
    Abstract: A rapid hydrothermal process was introduced to prepare single phase CoxFe3-xO4 (0≤x≤2). The samples were characterized by X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), N2adsorption/desorption isotherms, and magnetometry. The effects of Co content, initial Congo red (CR) concentration, and pH on adsorption capacity were investigated. The results indicated that Co1.6Fe1.4O4 exhibited the largest specific surface area of 170.1 m2·g-1 and the highest equilibrium adsorption capacity of 475 mg·g-1 for CR with an initial concentration of 200 mg·L-1at pH=3.The adsorption kinetics and isotherms were analyzed and the Langmuir maximum adsorption capacity of the Co1.6Fe1.4O4 nanoparticles was estimated to be 370.4 mg·g-1 for CR. Moreover, the excellent magnetic properties of the Co1.6Fe1.4O4 nanoparticles means they have potential as a recyclable material as they can be regenerated and reused without any significant decrease in the CR adsorption capacity.
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  • 收稿日期:  2015-12-16
  • 刊出日期:  2017-02-18
张子元, 王寅岗. 改进水热法合成纳米CoxFe3-xO4(0≤x≤2)及其对刚果红染料的吸附性能[J]. 环境工程学报, 2017, 11(2): 899-907. doi: 10.12030/j.cjee.201510019
引用本文: 张子元, 王寅岗. 改进水热法合成纳米CoxFe3-xO4(0≤x≤2)及其对刚果红染料的吸附性能[J]. 环境工程学报, 2017, 11(2): 899-907. doi: 10.12030/j.cjee.201510019
shu
ZHANG Ziyuan, WANG Yingang. Adsorption performance of Congo red on CoxFe3-xO4 (0≤x≤2) nanoparticles synthesized by improved hydrothermal method[J]. Chinese Journal of Environmental Engineering, 2017, 11(2): 899-907. doi: 10.12030/j.cjee.201510019
Citation: ZHANG Ziyuan, WANG Yingang. Adsorption performance of Congo red on CoxFe3-xO4 (0≤x≤2) nanoparticles synthesized by improved hydrothermal method[J]. Chinese Journal of Environmental Engineering, 2017, 11(2): 899-907. doi: 10.12030/j.cjee.201510019
shu

改进水热法合成纳米CoxFe3-xO4(0≤x≤2)及其对刚果红染料的吸附性能

  • 1. 南京航空航天大学材料科学与技术学院, 南京 210016
  • 收稿日期:  2015-12-16
基金项目:

江苏省工业和大学联合创新基金（BY2013003-01）

江苏高校优势学科建设工程资助项目（PAPD）

摘要: 采用快速水热法制备了纯相CoxFe3-xO4（0≤x≤2）纳米颗粒，并对样品进行了XRD、EDX、FTIR、SEM、N2吸附-脱附以及VSM表征，研究了Co含量、初始浓度和pH值对水中刚果红吸附性能的影响。实验结果表明，Co1.6Fe1.4O4纳米颗粒具有最大的比表面积170.1 m2·g-1和最好的吸附性能，在pH=3，初始浓度为200 mg·L-1时，饱和吸附容量达到475 mg·g-1。对CoxFe3-xO4进行了吸附过程动力学和热力学分析，该吸附过程符合准二级动力学模型，根据Langmuir等温吸附模型计算得出最大吸附容量为370.4 mg·g-1。良好的磁性能使Co1.6Fe1.4O4纳米颗粒很容易从水中分离再利用，实验表明，经过多次脱附/吸附过程，Co1.6Fe1.4O4纳米颗粒对刚果红仍具有良好的吸附性能。

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