気相酸化処理黒鉛への窒素およびアルゴンの77Kにおける吸着

概要

論文の詳細を見る
Burning the natural graphite partially with gas mixture of O2 and H2O at 600℃ diminished the amount of CO2- and H2O-desorbing oxides thereon, against expections. As a result of decrease in the surface oxides that forns the walls of pores existing on the graphite samples, the specific surface as well as the pore volume has decreased. As the degree of burning off gets higher, the JE step near X=0.4 has become more prominent, and at the same time, the hysteresis between adsorption and desorption has become less prominent. The JE step corresponds to the process of formation of the second adsorption layer, and the hysteresis is due to the presence of pores. Therefor, the phenomena observed suggest that the surface thus burnt is rather homogeneous to N2 and Ar than before the treatment. Through comparing the amount of N2 and Ar adosorbed at the end of the JE step with the monolayer capacity, Vm, it should also be inferred that this burning treatment has made the mesopores on the graphite samples still more shallow than the heat treatment does.
津山工業高等専門学校の論文
2005-02-28