• 摘要: 研究以氯化铁的醇溶液为前驱体、有机路易斯碱为凝胶促进剂,快速制备氧化铁的醇凝胶,再通过CO2超临界干燥工艺得到氧化铁气凝胶。用透射电镜(TEM)对氧化铁气凝胶的微观结构的表征结果表明,气凝胶主要由超细微粒堆积而成。经BET和BJH测试,气凝胶样品的密度为138 mg/cm3时,孔径为97 nm,孔体积为1.97 cm3/g,比表面积为487 m2/g。XRD研究表明,组成氧化铁气凝胶的晶形结构主要为-βFeOOH。

     

    Abstract: Monolithic Ferrite(Ⅲ) oxide aerogels were prepared from inorganic salt precursors by hydrolysis and condensation.The approach is straightforward,inexpensive,versatile and it can produce monolithic mesoporous material with high specific surface area and very low bulk density.Dried ferrite(Ⅲ) aerogel were characterized by transmission electron microscopy(TEM) and nitrogen adsorption/desorption analyses.The results of XRD show that the monolithic ferrite(Ⅲ) oxide aerogel obtained is β-FeOOH.

     

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