物理化学学报 >> 2013, Vol. 29 >> Issue (03): 590-596.doi: 10.3866/PKU.WHXB201212123

催化和表面科学 上一篇    下一篇

硬模板法合成磁性石墨化介孔碳及在中药废水吸附处理中的应用

洪周琴, 李金霞, 张芳, 周丽绘   

  1. 华东理工大学分析测试中心, 上海 200237
  • 收稿日期:2012-10-02 修回日期:2012-12-12 发布日期:2013-02-25
  • 通讯作者: 周丽绘 E-mail:lhzhou@ecust.edu.cn
  • 基金资助:

    华东理工大学分析测试中心经费资助项目

Synthesis of Magnetically Graphitic Mesoporous Carbon from Hard Templates and Its Application in the Adsorption Treatment of Traditional Chinese Medicine Wastewater

HONG Zhou-Qin, LI Jin-Xia, ZHANG Fang, ZHOU Li-Hui   

  1. Research Center of Analysis and Test, East China University of Science and Technology, Shanghai 200237, P. R. China
  • Received:2012-10-02 Revised:2012-12-12 Published:2013-02-25
  • Supported by:

    The project was supported by the Research Center of Analysis and Test of East China University of Science and Technology, China.

摘要:

以SBA-15为模板, 蔗糖为碳源, 硝酸铁辅助催化合成磁性石墨化介孔碳复合材料(Fe/GMC). 利用X射线粉末衍射(XRD)、透射电子显微镜(TEM)、N2吸附-脱附(BET)、拉曼光谱等对反应产物进行了表征. 硝酸铁辅助催化可以在较低碳化温度(900℃)下实现介孔碳的部分石墨化, 并同步生成磁性Fe3O4颗粒, 合成的产物比表面积大、孔道有序、磁性强. 运用紫外-可见(UV-Vis)光谱考察了该复合材料对中药红花色素废水的吸附特性,复合材料的吸附速率快、吸附量高, 具有良好的脱色效果并能实现吸附剂的快速固液磁分离.

关键词: SBA-15, 硬模板法, 介孔碳, 石墨化, 磁性Fe3O4

Abstract:

Magnetically graphitic mesoporous carbon (Fe/GMC) was synthesized, using SBA-15 as a template and sucrose as a carbon source, with the assistance of ferric nitrate impregnation. The properties of the products were characterized using powder X-ray diffraction (XRD), transmission electron microscopy (TEM), N2 adsorption-desorption (BET), and Raman spectroscopy. The impregnation of Fe3+ promoted the partial graphitization of ordered mesoporous carbon at low temperature (900℃), and resulted in the production of magnetic Fe3O4 particles. These complex materials possessed an ordered mesoporous pore structure, large surface area, and magnetic properties. The adsorption properties of Fe/GMC for traditional Chinese medicine wastewater were studied in detail using UV-Vis spectroscopy. The results showed that the Fe/GMC materials displayed rapid adsorption, and had a high adsorption capacity. Fe/GMC could be used as an absorbent for the highly efficient removal of pigments from Carthamus tinctorius flowers via rapid solid-liquid magnetic separation.

Key words: SBA-15, Hard template, Mesoporous carbon, Graphitization, Magnetic Fe3O4

MSC2000: 

  • O647