A study on Adsorption of Molecules by Ftnir and Calorimetry

1)羟基磷灰石的表面结构和吸附研究发现，羟基磷灰石表面存在P-OH基团，是各种分子如H_2O、CO_2和有机分子的吸附中心。化学吸附了大量的H_2O、CO_2和CH_3OH。用红外光谱分析了化学吸附的机理。2)贵重氧化铁的制备与表征在不同络合剂存在下制备的氧化铁具有选择性吸附H_2O_3的特性。3)微孔赤铁矿的制备和吸附性能研究发现，在200ﾟC以上放气生成的赤铁矿(α-Fe_2O_3)具有0.8 nm宽的狭缝状微孔。用FTIR研究了该赤铁矿表面Fe-OH基团和微孔中吸附分子的状态。分子在缝隙微孔中的吸附取决于分子的偶极矩、分子大小和化学反应活性。4)对H_2O、CCl_4、C_6H_6和n-C_6H_1、14&gt；这一结果是基于伽马-FeOOH表面的化学和几何非均质性来解释的。5)单分散球形金属磷酸盐颗粒的制备和表征用各种技术对单分散的磷酸钴镍颗粒进行了表征。这些颗粒的层状结构导致了对H_2O的选择性吸附。在100ﾟC以上处理的颗粒具有中空结构。

1)Surface structure of and adsorption of molecules on hydroxylapatitesIt was found that the P-OH groups exist on the strontium and calcium hydroxylapatites and function as the adsorption sites for various molecules such as H_2O, CO_2 and organic molecules. A Liart of adsorbed H_2O, CO_2 and CH_3OH were chemisorbed. The mechanism of chemisorption was clarified by FTIR.2)Preparation and characterization of noble iron oxidesThe iron oxides prepared in the presence of various chelating agents showed the characteristic adsorption properties such as selective adsorption of H_2O.3)Preparation and adsorptive property of microporous hematiteThe hematite(alpha-Fe_2O_3) Produced by outgassing delta-FeOOH above 200ﾟC was found to have-slit-like micropores of 0.8 nm width. The states of the surface FE-OH groups of this hematite and of the adsorbed molecules in the micropores were investigated by FTIR. The adsorption of molecules in the slit-like micropore depended on their dipole moments, molecular sizes and chemical reactivities.4)Step-like adsorption isotherm and surface heterogeneityStep-like isotherms were discovered on the adsorption of H_2O, CCl_4, C_6H_6 and n-C_6H_<14>. This result was explained based on the, chemically and geometrically heterogeneity of gamma-FeOOH surface.5)Preparation and characterization of monodispersed spherical metal phosphate particlesThe mondispersed particles of cobalt and nickel phosphates were characterized by various techniques. The layer structures of these particles led to the selective adsorption of H_2O. The particles treated above 100ﾟC possessed a hollow structure.