蓬松球形碳纳米颗粒的合成及其表征

Synthesis and characterization of fluffy spherelike carbon nanoparticles

以沸点为50℃的全氟碳为碳源,金属钠为还原剂,采用溶剂热的方法,在400℃时合成了蓬松的球形碳纳米颗粒,产率高达90%。结果表明,Na在全氟碳分解成碳的过程中起关键作用,而反应温度起到控制碳颗粒大小的作用;氮气吸附脱附结果表明,400℃时合成碳纳米颗粒为介孔材料的特征吸附脱附等温线,比表面积为51.8m2/g,孔径主要集中在4.5～45nm。

Based on solvothermal routes,a reduction approach was developed to synthesize fluffy spherelike carbon nanoparticles with a yield of about 90% by pyrolysis perfluocarbon（boiling poit： 50℃） under the reductant of Na at 400℃.Through the investigation of experimental parameters,the result indicated that Na and reaction temperature played key roles on the production and size of carbon nanoparticles,respectively.The results of N2 adsorption-desorption isotherm indicated the BET surface areas of carbon nanoparticles at 400℃ was 51.8m2/g,and the pore-size distribution centered from 4.5 to 45nm.