Monosilane Adsorption on Porous Alumina

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Abstract
Adsorption of monosilane on porous adsorbents consisting of γ‐alumina, alumina‐silica, and silica was investigated. The maximum adsorption capacity was observed for alumina adsorbents with drying in nitrogen at ∼100°C. Thus, monosilane is deduced to react with hydroxyl groups on γ‐alumina surface, although physically adsorbed water interferes with the reaction. On the other hand, hydroxyl groups on silica were inactive for monosilane. The difference in the reactivity of hydroxyl groups with monosilane is ascribed to the basicity of the oxides.

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