熔盐法制备氮掺杂多孔炭及其催化脱硫性能

采用熔融盐合成技术, 以生物质葡萄糖和富氮三聚氰胺为前驱体, 成功制备得到具有发达孔隙结构(BET表面积: 1355 m²/g)和极高氮掺杂量(20.73wt%)的氮掺杂多孔炭材料。X射线光电子能谱(XPS)分析表明, 多孔炭材料中的氮原子主要以吡咯及吡啶构型存在, 这两种形态的氮原子有利于硫化氢的吸附及催化氧化。在常温、常压下, 所制备氮掺杂多孔炭对硫化氢非金属催化转化为单质硫的脱除硫容高达1.10 g/g。该合成方法简便易行, 有望实现氮掺杂多孔炭材料的批量和廉价制备, 合成的氮掺杂多孔炭在污染物控制领域应用潜能巨大。

Facile Preparation of Nitrogen-doped Porous Carbons via Salt Melt Synthesis with Efficient Catalytic Desulfurization Performance

A series of N-doped porous carbons were prepared using biomass D-glucose and nitrogen-rich melamine as precursors via facile salt melt synthesis method. The obtained N-doped porous carbons exhibit developed porosity (BET surface area up to 1355 m²/g) and notablely high nitrogen content (20.73wt%). X-ray photoelectron spectroscope (XPS) results indicate that the nitrogen configurations in the carbons are mainly pyrrolic and pyridinic functional groups, which are in favor of catalytic oxidation of hydrogen sulfide to elemental sulfur. High sulfur capacity of 1.10 g/g is achieved over the optimized carbon materials at room temperature and ambient pressure, showing the excellent adsorptive-catalytic performance of N-doped porous carbons for hydrogen sulfide removal. The facile synthesis route enables a great potential for the scale-preparation of N-doped porous carbons and application in pollution control.