高等学校化学学报 ›› 2018, Vol. 39 ›› Issue (10): 2253-2264.doi: 10.7503/cjcu20180259

• 物理化学 • 上一篇    下一篇

多层组装聚苯胺@硅磁复合物的制备及对磺酸基染料的选择性吸附

周艳芬, 孟哲(), 王泽岚, 李吉光, 门秀琴, 刘万毅   

  1. 宁夏大学化学化工学院, 省部共建煤炭高效利用与绿色化工国家重点实验室, 银川 750021
  • 收稿日期:2018-04-04 出版日期:2018-09-10 发布日期:2018-09-10
  • 作者简介:

    联系人简介: 孟 哲, 女, 博士, 教授, 主要从事功能材料的制备及分离技术方面的研究. E-mail: meng_z@nxu.edu.cn

  • 基金资助:
    国家自然科学基金(批准号: 21768003)、 西部地区建设一流大学的重大创新项目(批准号: ZKZD2017003)和宁夏国内一流学科建设项目(批准号: NXYLXK2017A04)资助.

Preparation and Selective Adsorption Performance of Polyaniline Silicon Magnetic Composite by Multilayer Assembly for Sulfonic Dye

ZHOU Yanfen, MENG Zhe*(), WANG Zelan, LI Jiguang, MEN Xiuqin, LIU Wanyi   

  1. State Key Laboratory of High-efficiency Coal Utilization and Green Chemical Engineering,School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China
  • Received:2018-04-04 Online:2018-09-10 Published:2018-09-10
  • Contact: MENG Zhe E-mail:meng_z@nxu.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No. 21768003), the Major Innovations Project for Building First-Class Universities in China’s Western Region(No. ZKZD2017003) and the National First-Rate Discipline Construction Project of Ningxia, China(No. NXYLXK2017A04).

摘要:

以硅磁粒子(Fe3O4@SiO2)为核, 采用低温-原位氧化聚合-共沉淀法制备了多层核壳聚苯胺硅磁复合物(Fe3O4@SiO2@PANI). 通过X射线衍射分析(XRD)、 傅里叶变换红外光谱(FTIR)、 扫描电子显微镜(SEM)和透射电子显微镜(TEM)等对Fe3O4@SiO2@PANI复合物的结构、 形貌和性质进行了表征. 以磺酸基偶氮染料甲基橙、 刚果红和蒽醌染料茜素红溶液模拟染料废水, 对其在Fe3O4@SiO2@PANI上的吸附进行了研究, 讨论了pH值、 吸附时间、 染料初始浓度及吸附剂用量对吸附过程的影响, 优化了吸附条件. 实验结果表明, 弱酸性(pH<6.0)条件下, Fe3O4@SiO2@PANI对甲基橙、 刚果红和茜素红具有优异的选择性吸附性能, 其平衡吸附量分别为26.05, 34.0 和69.58 mg/g. 该复合物对染料的吸附过程更接近Langmuir等温吸附的单分子层吸附机理, 其对染料废水的去除率高达96.5%, 易于分离, 且重复使用性能良好.

关键词: 硅磁粒子, 聚苯胺, 磺酸基染料, 选择性吸附

Abstract:

A multi-layer core-shell polyaniline silicon magnetic composite(Fe3O4@SiO2@PANI) via in situ oxidation polymerization-coprecipitation of silicon magnetic particles(Fe3O4@SiO2) as core at low temperature was prepared. The structure, surface morphology and properties of Fe3O4@SiO2@PANI composites were characterized by means of X-ray means of diffraction(XRD), Fourier transform infrared spectroscopy(FTIR), scanning electron microscopy(SEM) and transmission electron microscopy(TEM). Using sulfonic azo dyes-methyl orange(MO), congo red(CR), and anthraquinone dye-alizarin red(AR) in aqueous solution, respectively, as an example for dyes in wastewaters, the effects of dyes adsorption pH, adsorption time, dyes concentration and amount of Fe3O4@SiO2@PANI on the adsorption process were studied. The sulfonic dyes was more effective with weakly acidic(pH<6.0). The maximum adsorption capacity of MO, AR and CR on Fe3O4@SiO2@PANI were 26.05, 69.58 and 34.0 mg/g, respectively, under optimized conditions. Analysis of the adsorption results demonstrated that the adsorption was better fit by Langmuir adsorption equation compared to Freundlich adsorption. The results suggested that the shell PANI of Fe3O4@SiO2@PANI composite had good affinity for sulfonic dyes, and the removal efficiency of composites on dye wastewater reached up to 96.5%. In addition, the magnetic composite could be effectively and simply separated by using an external magnetic field and had good repeatability as sorbent of the sulfonic dye wastewater treatment.

Key words: Silicon magnetic particles, Polyaniline, Sulfonic dye, Selective adsorption

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