大学化学 >> 2020, Vol. 35 >> Issue (12): 212-220.doi: 10.3866/PKU.DXHX201911005

化学实验 上一篇    下一篇

磁性Co/C纳米复合材料的合成及其对水中刚果红吸附性能研究

蔡丹丹, 阮长平(), 邱建华, 吴丽芸, 张丛, 张羽真   

  • 收稿日期:2019-11-04 录用日期:2020-01-19 发布日期:2020-02-07
  • 通讯作者: 阮长平 E-mail:cpruan@mailbox.gxnu.edu.cn
  • 作者简介:阮长平，Email: cpruan@mailbox.gxnu.edu.cn
  • 基金资助:
    广西师范大学校级重点项目(2016ZD003);广西高等教育本科教学改革工程项目(2019JGB129);2018–2020年度广西本科高校特色专业及实验实训教学基地（中心）建设项目(发文号：桂教高教[2018]52号)

Synthesis of Magnetic Co/C Nanocomposite and Its Adsorption Performance for Congo Red in Aqueous Systems

Dandan Cai, Changping Ruan(), Jianhua Qiu, Liyun Wu, Cong Zhang, Yuzhen Zhang   

  • Received:2019-11-04 Accepted:2020-01-19 Published:2020-02-07
  • Contact: Changping Ruan E-mail:cpruan@mailbox.gxnu.edu.cn

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摘要：

介绍一个由科研成果转化形成的大学综合化学实验，本综合实验设计以金属有机框架材料ZIF-67为前驱体，通过高温热解法合成磁性Co/C纳米复合材料，并将其应用于水中刚果红有机染料的吸附性能研究。在本实验中用X射线粉末衍射仪和扫描电镜对材料的基本结构和形貌进行了表征，利用紫外-可见分光光度计绘制了刚果红的标准曲线，并详细考查了磁性Co/C纳米复合材料对刚果红染料的吸附性能，且对吸附动力学和吸附等温线进行了拟合和分析。本实验操作简单，实验结果稳定，适用于大学生综合化学实验。本实验涵盖了无机-有机杂化材料合成、结构表征、有机染料浓度定量分析、动力学和吸附等温线的测定以及数据拟合分析等化学专业基础和实验操作技能，不仅有利于提高学生的综合实验能力，也可以培养学生的科研兴趣，拓展学生的视野。

关键词: 金属有机框架材料, 磁性纳米复合材料, 刚果红, 吸附, 有机污染物

Abstract:

This comprehensive experiment has successfully introduced the frontier of scientific research into undergraduate laboratory teaching. A magnetic Co/C nanocomposite was synthesized by using ZIF-67 as the precursor. Upon calcination at high temperature in inert atmosphere, ZIF-67 was degraded and carbonized to form Co/C nanocomposite. The adsorption performance of Co/C nanocomposite for Congo Red was investigated in detail. The structure and composition of the nanocomposite were investigated by X-ray diffraction (XRD) and scanning electron microscope (SEM). The concentration of Congo Red was determined by UV-Vis spectrophotometry. The kinetics data was fitted with the pseudo-first-order and pseudo-second-order kinetic models. The adsorption isotherms were analyzed according to Langmuir and Freundlich isotherm models. This experiment covers the synthesis of inorganic-organic hybrid material, characterization of materials, concentration determination of dyes, analysis of dynamics data and adsorption isotherms. Therefore, this experiment enables students to practice their experimental skills, increase their interest in scientific research, and broaden their professional knowledge.

Key words: MOFs, Magnetic nanocomposite, Congo Red, Adsorption, Organic contaminants