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Human hair-derived nitrogen and sulfur co-doped porous carbon materials for gas adsorption

机译：人发氮，硫共掺杂多孔碳材料的气体吸附

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摘要

Human hair, a biowaste composed of protein, is converted into nitrogen and sulfur co-doped porous carbonaceous materials via a facile degradation and carbonization/activation process. The resulting carbon materials possess a large specific surface area value (2700 m(2) g(-1)) as well as high nitrogen and sulfur content (around 8.0 and 4.0 wt%, respectively). The morphology, composition and porous structure of the obtained materials were thoroughly characterized using scanning and transmission electron microscopy, elemental analysis, nitrogen and carbon dioxide sorption analysis, X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy, etc. It is confirmed that both the degradation and the carbonization/activation procedures play important roles in the porous structure formation. Furthermore, these materials are proven to exhibit good performances in gas adsorption: carbon dioxide uptake (up to 24.0 wt%, at 273 K and 1.0 bar), methane adsorption (up to 3.04 wt%, at 273 K and 1.0 bar), and hydrogen adsorption (up to 2.03 wt%, at 77 K and 1.0 bar). The high gas adsorption capacities could be attributed to the microporous structure combined with the surface functionalities. In addition, we believe that this synthesis process offers a facile and effective way for transforming protein-containing biowastes into functionalized porous carbonaceous materials.
机译：人发是一种由蛋白质组成的生物废料，它通过简便的降解和碳化/活化过程转化为氮和硫共掺杂的多孔碳质材料。所得的碳材料具有较大的比表面积值（2700 m（2）g（-1））以及较高的氮和硫含量（分别约为8.0和4.0 wt％）。使用扫描和透射电子显微镜，元素分析，氮和二氧化碳吸附分析，X射线光电子能谱和傅里叶变换红外光谱等方法，对所得材料的形貌，组成和多孔结构进行了全面表征。降解和碳化/活化程序在多孔结构形成中起重要作用。此外，事实证明，这些材料在气体吸附方面表现出良好的性能：二氧化碳吸收（在273 K和1.0 bar时高达24.0 wt％），甲烷吸附（在273 K和1.0 bar时高达3.04 wt％）和氢吸附（在77 K和1.0 bar下高达2.03 wt％）。高的气体吸附能力可以归因于微孔结构与表面功能的结合。另外，我们认为该合成方法为将含蛋白质的生物废物转化为功能化的多孔碳质材料提供了简便有效的方法。

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