Synthesis of nitrogen-doped porous graphitic carbons using nano-CaCO3 as template graphitization catalyst, and activating agent
Synthesis of nitrogen-doped porous graphitic carbons using nano-CaCO3 as template graphitization catalyst, and activating agent
复制标题
以纳米CaCO3为模板石墨化催化剂及活化剂合成氮掺杂多孔石墨碳
DOI：
10.1016/j.carbon.2012.03.050
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发表时间：
2012-08-01
期刊：
影响因子：
10.9
通讯作者：
Du, Chunyan
中科院分区：
文献类型：
--
作者：
Yang, Guangwen;Han, Heyou;Du, Chunyan
以廉价的纳米CaCO 3为模板剂，三聚氰胺-甲醛树脂为碳前驱体，稀盐酸为模板剂，制备了结构可控的氮掺杂多孔石墨炭（NPGCs）。除了用作模板之外，纳米CaCO 3还用作内部活化剂以产生微孔和中孔，作为吸附剂以去除释放的有害气体（即HCN，NH3），以及作为温和的石墨化催化剂。所获得的具有分级纳米孔的NPGC含有高达20.9重量%的氮，具有高达834 m2/g的表面积，并且还表现出相对于氧化的高热稳定性。使用碳水化合物或酚醛树脂作为碳前体，这种简单的方法也能够生产具有高表面积（高达1683 m2）g（-1）和极大孔体积（>6 cm（3）g（-1））的分级多孔石墨碳。X射线衍射和红外光谱分析表明，碳化过程中生成的中间产物CaCN 2或CaC 2对石墨结构的形成起着关键作用。(C)2012爱思唯尔有限公司保留所有权利。
Nitrogen-doped porous graphitic carbons (NPGCs) with controlled structures were synthesized using cheap nano-CaCO3 as template, melamine-formaldehyde resin as carbon precursor, and dilute HCl as template removing agent. In addition to its use as a template, the nano-CaCO3 acted as an internal activating agent to produce micro- and mesopores, as an adsorbent to remove the released hazardous gases (i.e. HCN, NH3), and as a mild graphitization catalyst. The obtained NPGCs with hierarchical nanopores contained as high as 20.9 wt% of nitrogen, had surface areas of up to 834 m(2) g(-1), and also exhibited high thermal stability with respect to oxidation. Using carbohydrate or phenolic resin as the carbon precursor, this simple approach was also capable of producing hierarchical porous graphitic carbons with high surface area (up to 1683 m(2) g(-1)) and extremely large pore volumes (>6 cm(3) g(-1)). X-ray diffraction and infrared spectroscopy suggested that the intermediate CaCN2 or CaC2 generated during the carbonization plays a critical role in the formation of the graphitic structure. (C) 2012 Elsevier Ltd. All rights reserved.