Citation: HONG Zhou-Qin, LI Jin-Xia, ZHANG Fang, ZHOU Li-Hui. Synthesis of Magnetically Graphitic Mesoporous Carbon from Hard Templates and Its Application in the Adsorption Treatment of Traditional Chinese Medicine Wastewater[J]. Acta Physico-Chimica Sinica, 2013, 29(03): 590-596. doi: 10.3866/PKU.WHXB201212123
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
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.
English
Synthesis of Magnetically Graphitic Mesoporous Carbon from Hard Templates and Its Application in the Adsorption Treatment of Traditional Chinese Medicine Wastewater
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.
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Key words:
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SBA-15
- / Hard template
- / Mesoporous carbon
- / Graphitization
- / Magnetic Fe3O4
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