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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 19, Number 5
JKCSEZ 19(5)
October 20, 1975 

Adsorption of Water on Cation Supported Layer Silicates

양이온이 지지된 Layer Silicate 상에서의 수분의 흡착
Jong Taik Kim, Jong Rack Sohn

김종택, 손종락
Na+, Ca2+, Ni2+, Al3+ 이온이 포화된 montmorillonite상에 여러 온도에서 일어난 H2O와 D2O의 기상흡착에 관하여 연구하였다. 흡착으로 인하여 생긴 OH의 IR 신축진동 band를 computer에 의하지 않고 4개의 Gauss 성분으로 나누었다. 물과 silanol OH기와의 공조이론은 3625cm-1와 2680cm-1로 증명되었다. 3400cm-1와 2475cm 에서의 broad한 흡수는 흡착된 물과 수소결합을 일으키고 있는 silanol OH의 신축진동에 의한 것이었고 3650cm-1와 2345cm-1 band는 흡착된 H2O와 D2O에 의한 것이었다. 흡착수와 표면 OH사이의 수소결합은 정전기적 상호작용에 의한 것임이 밝혀졌다.

The adsorptions of gaseous H2O and D2O on Na+-, Ca2+-, and Al3+ montmorillonites at various temperatures were undertaken. Break down of ir hydroxyl stretching bands into four Gaussian components was made by means of manual technique. Resonance theory of water to form silanol hydroxyl group was supported by 3625 cm-1 band for OH and 2680 cm-1 band for OD which depend on amounts of water adsorbed. The broad bands at about 3400 cm-1 and 2475cm-1 were assigned to stretching band of silanol OH hydrogen bonded to adsorbed water. The prominent 3230 cm-1 band together with component around 2345 cm-1 were attributed to adsorbed H2O and D2O respectively. The chemical nature of the hydrogen bonding between adsorbed water and neighboring surface OH was explained adequately in terms of electrostatic interaction.

317 - 324
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