Structural stability and electron energy state of the H2SO4-graphite deintercalation compounds

✍ Scribed by W.-Ch. Oh; N.-Kh. Bae; Y.-Ja. Choi; Y.-Sh. Ko

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 455 KB
• Volume: 33
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(94)00124-i

✦ Synopsis

We present experimental

results on stage stability and stage transition in H,SO,-GDICs by X-ray measurements, and electronic energy state by UV/VIS spectrophotometer measurements.

From the results of X-ray measurements, it is shown that the changes of stage and d, value are irregular and occur randomly, and that the penetration of H,O molecules into the intercalated H,SO, layers and oxidation cause the deintercalation of HSO, from the interlayers of H,SO,-GICs, resulting in the disordered stages of H,SO,-GDICs.

The results of UV/VIS spectrophotometer measurements show that the minimum values of reflectance move gradually to the lower energy state with deintercalation time and increase in value slowly, and that the H-JO,-GDICs are relatively stable up to the sixth week in H$O, solutions. This study provides information on the intercalated HSO; content and the stability of H,SO,-GICs during the deintercalation process.