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通过β-FeOOH纳米棒无序聚集制备α-Fe₂O₃中空球

Preparation of α-Fe₂O₃ Hollow Spheres via Random Aggregation of β-FeOOH Nanorods

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【Author】 YU Hai-Yun,1,2 CHEN Guo-Zhu2 SUN Si-Xiu2 YIN Zhi-Lei2 SONG Xin-Yu2(1Anhui Key Laboratory of Materials and Processing,School of Materials Science and Engineering,Anhui University of Technology,Maanshan,Anhui 243002)(2School of Chemistry,Shandong University,Jinan 250100)

【机构】安徽省金属材料与加工重点实验室安徽工业大学材料科学与工程学院；山东大学化学学院；山东大学化学学院马鞍山243002；济南250100；

【摘要】 <正>近年来,纳米材料的制备研究中的热点之一是各种中空独立几何结构的构筑[1],这是由于中空结构除了可用来构建复杂结构量子器件外,还具有比表面积大、密度低和稳定性好等特点,因此在光子器件、药物载体、材料封装和催化剂载体等方面也有着广泛的应用[2,3]。通过严格控制液相体系条件,使其中的纳米颗粒发生有序聚集是制备各种中空结构的有效途径之一[2]。更多还原

【Abstract】 The α-Fe2O3 hollow spheres have been synthesized through the random aggregation of β-FeOOH nanorods in the C2H5OH/H2O system.The phase transformation and the morphologies of the α-Fe2O3 hollow structure were investigated with XRD,SEM,TEM and selected area electron diffraction(SAED).These studies indicate that the second step is a dissolution-recrystallization process.Furthermore,the formation mechanism of the hollow spheres has been discussed.It is found that the presence of H2O in the reaction system is essential to the final formation of the hollow spheres.更多还原