常压下Fe3O4@C磁性复合材料的制备及其对亚甲基蓝的吸附

doi:10.16085/j.issn.1000-6613.2017-0868

化工进展 ›› 2018, Vol. 37 ›› Issue (02): 767-774.DOI: 10.16085/j.issn.1000-6613.2017-0868

常压下Fe₃O₄@C磁性复合材料的制备及其对亚甲基蓝的吸附

陈齐亮, 王赛丹, 张佳, 李涛, 任保增

郑州大学化工与能源学院, 河南郑州 450001

收稿日期:2017-05-11 修回日期:2017-06-23 出版日期:2018-02-05 发布日期:2018-02-05
通讯作者: 李涛,副教授,博士,研究方向为绿色化工与技术。
作者简介:陈齐亮(1990-),男,硕士研究生。E-mail:732435771@qq.com。
基金资助:
国家自然科学基金青年基金（21506197）及国家自然科学基金（21646011）项目。

Preparation of magnetic Fe₃O₄@C composites under ambient pressure and their adsorption of methylene blue

CHEN Qiliang, WANG Saidan, ZHANG Jia, LI Tao, REN Baozeng

School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, Henan, China

Received:2017-05-11 Revised:2017-06-23 Online:2018-02-05 Published:2018-02-05

摘要/Abstract

摘要： 以共沉淀法合成的Fe₃O₄为载体，在常温常压下，利用浓硫酸蔗糖碳化法制备出Fe₃O₄@C磁性复合材料，通过傅里叶变换红外光谱仪（FTIR）、X射线粉末衍射仪（XRD）、扫描电镜（SEM）、透射电镜（TEM）和磁学测量系统（MPMS）手段对合成的磁性复合材料进行表征，并研究了Fe₃O₄@C对水中亚甲基蓝的吸附性能。考察了吸附剂用量、溶液pH、吸附温度、震荡时间等因素对吸附过程的影响。结果表明，Fe₃O₄@C表面分布有大量不规则的孔道，其饱和磁化强度为18.45emu/g；当亚甲基蓝初始浓度为100mg/L，吸附剂加入量1g/L，吸附时间150min，吸附温度25℃，pH=12时，得到吸附容量为96.74mg/g。Fe₃O₄@C对水中亚甲基蓝的吸附符合Langmuir模型，吸附过程动力学符合准二级动力学方程，吸附过程是吸热及熵增加的过程；Fe₃O₄@C经过稀硫酸溶液解吸之后可以重复利用。

关键词: Fe₃O₄@C, 常压, 亚甲基蓝, 吸附

Abstract: Under ambient temperature and pressure, the magnetic Fe₃O₄@C was synthesized by sulfuric acid sucrose carbonization method and with Fe₃O₄ synthesized by co-precipitation and as the carrier. The resulting products were characterized by Fourier transform infrared spectra(FTIR), X-ray powder diffraction(XRD), scanning electron microscope(SEM), transmission electron microscope (TEM), and magnetic property measurement system(MPMS). The Fe₃O₄@C was tested for the ability to remove methylene blue(MB). The effects of adsorbent dosage, solution pH, adsorption temperature and oscillating time on the adsorption process were investigated. The results showed that there are a lot of irregular holes in the surface of Fe₃O₄@C and its saturation magnetization is 18.45emu/g. When the initial concentration of MB is 100mg/L, adsorbent dosage is 1g/L, adsorption time is 150min, adsorption temperature at 25℃, pH=12, the maximum adsorption capacity reaches 96.74mg/g. The experimental data fitted well with Langmuir model. The adsorption kinetic fitted well with the pseudo-second-order kinetic, and the adsorption of MB was an endothermic and the confusion degree increase process. Fe₃O₄@C could be regenerated by washing with H₂SO₄ aqueous solution.

Key words: Fe₃O₄@C, ambient pressure, methylene blue, adsorption

中图分类号:

X703.1

陈齐亮, 王赛丹, 张佳, 李涛, 任保增. 常压下Fe₃O₄@C磁性复合材料的制备及其对亚甲基蓝的吸附[J]. 化工进展, 2018, 37(02): 767-774.

CHEN Qiliang, WANG Saidan, ZHANG Jia, LI Tao, REN Baozeng. Preparation of magnetic Fe₃O₄@C composites under ambient pressure and their adsorption of methylene blue[J]. Chemical Industry and Engineering Progress, 2018, 37(02): 767-774.

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常压下Fe₃O₄@C磁性复合材料的制备及其对亚甲基蓝的吸附

Preparation of magnetic Fe₃O₄@C composites under ambient pressure and their adsorption of methylene blue

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