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测定固体表面上吸附层的有关热力学性质并探讨其结构,这在吸附现象的一些研究中是很有意义的。我们曾用精密自动绝热量热计测定了H_2O/γ-Al_2O_3和H_2O/Silica等吸附体系在200～320K温度范围内的热容,得到了一些颇有意义的结果。为研究γ-Al_2O_3的表面结构和组成对吸附层的影响,我们又测定了H_2O/γ-Al_2O_3·H_2O吸附体系在180～320 K范围内的热容,并对结果进行了讨论。
The determination of the thermodynamic properties of the adsorbed layer on the solid surface and its structure is of great interest in some studies of adsorption phenomena. We have used precision automatic adiabatic calorimeter to determine the heat capacity of H 2 O / γ-Al 2 O 3 and H 2 O / Silica adsorption systems in the temperature range of 200 ~ 320K. Some meaningful results have been obtained. To study the effect of the surface structure and composition of γ-Al 2 O 3 on the adsorption layer, we also measured the heat capacity of the H 2 O / γ-Al 2 O 3 · H 2 O adsorption system in the range of 180-320 K and discussed the results.