以络离子为铁源合成介孔氧化铁

Synthesis of Mesoporous Iron Oxide Particles Using a Complex Ion as Iron Source

用阳离子型表面活性剂十六烷基三甲基溴化铵(CTAB)为模板剂、[FeF6]3-为铁源、氨水为沉淀剂合成了介孔-βFeOOH(四方纤铁矿)粒子。对所合成的介孔氧化铁粒子用红外光谱(IR)、粉末X-射线衍射(XRD)、透射电子显微镜(TEM)、扫描电子显微镜(SEM)、热重-差热分析(TG-DSC)、氮气吸附脱附(BET)等手段进行了表征。结果表明,介孔氧化铁粒子具有不规则椭球状形貌、虫孔状介孔结构,比表面积达164.4 m2/g,用乙醇萃取可以完全除去所使用的表面活性剂模板。

Mesoporous β-FeOOH（akaganeite） particles were prepared by a surfactant-templating method,using a complex ion 3-as inorganic source;ammonia as precipitant and cationic surfactant（CTAB） as template.Washing by Soxhlet extraction with ethanol could eliminate the template surfactant.The particles were characterized by Fourier transform infrared（IR）,powder X-ray diffraction（XRD）,transmission electron microscopy（TEM）,thermogravimetric analysis and differential scanning calorimetry（TG-DSC）,as well as Brunauer-Emmett-Teller surface（BET） area measurement.The mesoporous particles were irregularly ellipsoidal in shape and there were wormhole-like mesopores in each ellipsoidal particle.The surface area of mesoporous akaganeite particles was 164.4 m2/g.