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首页> 外文期刊>Carbon: An International Journal Sponsored by the American Carbon Society >Synthesis of nitrogen-doped porous graphitic carbons using nano-CaCO3 as template, graphitization catalyst, and activating agent
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Synthesis of nitrogen-doped porous graphitic carbons using nano-CaCO3 as template, graphitization catalyst, and activating agent

机译：以纳米CaCO3为模板，石墨化催化剂和活化剂合成氮掺杂多孔石墨碳

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摘要

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 HC1 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 m2 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.
机译：以廉价的纳米碳酸钙为模板，三聚氰胺-甲醛树脂为碳前驱体，稀盐酸为模板去除剂，合成了结构可控的氮掺杂多孔石墨碳。纳米CaCO3除了用作模板外，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）和作为温和的石墨化催化剂。所获得的具有分级纳米孔的NPGCs含氮量高达20.9 wt％，表面积高达834 m〜2 g〜（-1），并且还具有较高的抗氧化热稳定性。使用碳水化合物或酚醛树脂作为碳前体，这种简单的方法还能够生产具有高表面积（高达1683 m2 g〜（-1））和极大的孔体积（> 6 cm〜3 g）的分层多孔石墨碳〜（-1））。 X射线衍射和红外光谱表明，碳化过程中产生的中间CaCN2或CaC2在石墨结构的形成中起关键作用。

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