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首页> 外文期刊>Journal of porous materials >Magnetic carbon aerogel pyrolysis from sodium carboxymethyl cellulose/sodium montmorillonite composite aerogel for removal of organic contamination
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Magnetic carbon aerogel pyrolysis from sodium carboxymethyl cellulose/sodium montmorillonite composite aerogel for removal of organic contamination

机译：羧甲基纤维素钠/蒙脱土复合气凝胶的磁性碳气凝胶热解法去除有机污染物

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摘要

In this paper, we present a facile approach for the synthesis of polysaccharide-based carbon aerogel by sol-gel processing, freeze-drying, and pyrolysis of a sodium carboxymethyl cellulose/sodium montmorillonite composite aerogel. The as-prepared carbon aerogel was characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffractometry, nitrogen adsorption measurements, and vibrating sample magnetometry. The carbon aerogel obtained in this study possessed low density (0.064 +/- 0.0029 g/cm(3)), a high surface area (185 m(2)/g), and flame retardance. Measurements of the magnetic properties indicated that the carbon aerogel exhibited typical ferromagnetic characteristic at room temperature. The absorption capacity of the carbon aerogel for oils and organic solvents is as much as 10-20 times its own weight. Moreover, a method of combustion could be employed to recycle the carbon aerogel. The results imply that the carbon aerogel is a potential cost-effective adsorbent for oil and organic pollutants from aqueous solutions in environmental pollution cleanup.
机译：在本文中，我们提出了一种通过溶胶-凝胶加工，冷冻干燥和热解羧甲基纤维素钠/蒙脱土复合气凝胶来合成多糖基碳气凝胶的简便方法。所制备的碳气凝胶通过扫描电子显微镜，傅立叶变换红外光谱，X射线衍射法，氮吸附测量和振动样品磁力法进行表征。在这项研究中获得的碳气凝胶具有低密度（0.064 +/- 0.0029 g / cm（3）），高表面积（185 m（2）/ g）和阻燃性。磁性的测量表明，碳气凝胶在室温下表现出典型的铁磁特性。碳气凝胶对油和有机溶剂的吸收能力是其自重的10到20倍之多。而且，可以采用燃烧方法来回收碳气凝胶。结果表明，碳气凝胶是一种潜在的经济有效的吸附剂，可用于清除环境污染中水溶液中的油和有机污染物。

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