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Preparation and properties of novel microporous metal oxides

新型微孔金属氧化物的制备及性能

基本信息

批准号：
07454188
负责人：
ISHIKAWA Tatsuo
金额：
$ 4.99万
依托单位：
Osaka Kyoiku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1997
项目状态：
已结题

项目摘要

In this study, we could obtain many results on the preparation and properties of novel microporous metal oxides. The main results of the obtained ones are as follows.1) Preparation of hematite particles with uniform microporesThe hematite particles with slit-shaped pores with uniform width of 1nm were synthesized from delta-FeOOH.These particles exhibit a high adsorption selectivity and is suitable for catalysts and their carriers.2) Synthesis of ferrimagnetic porous metal oxidesThe Fe ions of delta-FeOOH are rather easily replaced with divalent metal ions, deferent from the other ferric oxyhydroxides. The ferric oxide particles containing divalent metal ions were produced by treating delta-FeOOH doped with various divalent metal ions at elevated temperatures. The formed particles had uniform micropores and were ferrimagnetic. This material can be used as adsorbents for drag delivery system and adsorbent and catalysts capable of moving and fixing with a magnetic filed.3) Preparation of porous magnetite with a high stability to oxidationThe high stable magnetite particles were obtained by doping a slight amount of Co and Ni. The Fe (II) contents of the formed particled were much larger than as usual magnetite. The electrical conductivity of the obtained magnetites was higher in two order than a commercial one. These magetites are able to be employed for chemical sensors.4) Control of the pore structure of aluminum phosphatesThe spherical aluminum phosphate particles were prepared in the presence of Fe (III) , Co (II) , Zn (II) and Mn (II) ions. The doped metal ions were not contained in the particles and developed the porosity besides Fe. This method can be applied for controlling of the pore structure of aluminum phosphate particles.

本研究在新型微孔金属氧化物的制备和性能方面取得了许多成果。主要研究结果如下：1）具有均匀微孔结构的赤铁矿颗粒的制备以δ-FeOOH为原料，合成了具有1 nm均匀狭缝状孔的赤铁矿颗粒，该颗粒具有较高的吸附选择性，适合于催化剂及其载体的制备; 2）亚铁磁性多孔金属氧化物的合成δ-FeOOH中的Fe离子很容易被二价金属离子取代，不同于其他羟基氧化铁。通过在升高的温度下处理掺杂有各种二价金属离子的δ-FeOOH来制备含有二价金属离子的氧化铁颗粒。所形成的颗粒具有均匀的微孔并且是亚铁磁性的。该材料可用作药物输送系统的吸附剂以及能够随磁场移动和固定的吸附剂和催化剂。3）具有高氧化稳定性的多孔磁铁矿的制备通过掺杂少量的Co和Ni，获得了高稳定性的磁铁矿颗粒。形成的颗粒的Fe（II）含量比通常的磁铁矿大得多。所得磁铁矿的电导率比商品磁铁矿高两个数量级。4）磷酸铝孔结构的控制在Fe（III）、Co（II）、Zn（II）和Mn（II）离子存在下制备了球形磷酸铝颗粒。掺杂的金属离子不包含在颗粒中，并开发了除Fe以外的孔隙。该方法可用于控制磷酸铝颗粒的孔结构。