CsC₂₄によるエチレン吸蔵のホスト効果

ホスト炭素材料の熱処理温度の効果

抄録

Ethylene-sorption isotherms of CsC₂₄ prepared from carbon materials with different heattreatment temperatures (HTT) of 1000, 1500, 2000 and 2600°c were determined at 194K. It was found that the saturated amount of ethylene sorbed by CsC₂₄ decreased with decreasing HTT of the starting material.
This behavior was discussed in connection with the degree of charge transfer between Cs and carbon layers. ¹³C-NMR of the CsC₂₄ samples showed that the degree of charge transfer decreases when HTT of the starting material decreases. Since the size of cesium decreases with reducing the extent of ionization (r_cs⁺=1.67Å, r_cs⁰=2.67Å), it can be said that the free volume of the interlayer spaces decreases with decreasing HTT, so that the amount of sorbed ethylene decreases with decreasing HTT.