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在酸含量不同的原材料中,通过爆轰的方法制备纳米石墨粉,并利用BET方程以及BJ H方法对所得纳米石墨粉进行比表面积和孔径分布分析。分析结果表明,所得爆轰产物中有的比表面积大致为天然鳞片石墨的5.3~9.2倍,而且随酸含量的增大逐渐增大,产物的等温线中存在吸附滞后现象。其中,增大的比表面积主要由分布在3 nm至7 nm之间的孔引起的,而且在爆轰后,孔径4 nm左右的孔,其数量达到最大值。通过对纳米石墨粉的研究,分析了酸在爆轰过程中的积极作用,并为纳米石墨粉的进一步应用提供了结构信息。
In raw materials with different acid contents, nano-graphite powder was prepared by detonation method, and the BET surface area and pore size distribution of the obtained nano-graphite powder were analyzed by BET equation and BJH method. The analysis results show that the specific surface area of the obtained detonation product is about 5.3-9.2 times that of natural flake graphite, and increases with the increase of acid content. The adsorption isotherm exists in the isothermal product. Among them, the increased specific surface area is mainly caused by the pores distributed between 3 nm and 7 nm, and the number of pores with a diameter of about 4 nm reaches the maximum after detonation. Through the study of nanometer graphite powder, the positive role of acid in detonation process is analyzed, and the structural information is provided for the further application of nanometer graphite powder.