Mechanism of Intercalation Compounds in Graphite with Hydrogen Sulfate (II. Study of Intermediate Phase between 2 stage and 1 stage in Graphite Hydrogen Sulfate)

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J. Korean Ceram. Soc. > Volume 25(4); 1988 > Article

Journal of the Korean Ceramic Society 1988;25(4): 408.

흑연에 황산을 Intercalation 시킬 때의 Mechanism 규명 (II. 화학적 방법에 의한 Graphite Salts의 중간상에 관한 연구)

고영신

서울교육대학

Mechanism of Intercalation Compounds in Graphite with Hydrogen Sulfate (II. Study of Intermediate Phase between 2 stage and 1 stage in Graphite Hydrogen Sulfate)

ABSTRACT

This thesis is 2nd thesis from "Mechanism of Intercalation Compounds in Graphite with Hydrogen sulfate(J. Korea Cer. Soc. Vol. 22. No.6, 1985). We have oxidized natural Graphite flakes(0.1~0.2mm., Kropfm hl passau in Deutchland. S40) with a solution of CrO3 in H2SO4. Whilst persulfate ions were intercalated, too, below 7$^{circ}C$, no evidence for intercalation of a peroxo compound was found at 22$^{circ}C$. The reaction was interrupted after various times by filtering and washing with concentrated H2SO4. X-ray diffraction showed that the 2nd stage compound had already been formed after 2 minutes. We could only follow further oxidation to the blue stage compound which was completed after 35 minutes. We have found six distinct intermediate stage between 2nd stage and 1 stage. Experiments are described on the formation of intermediate stage color and X-ray diffraction analysis.ysis.