期刊 Controllable Synthesis of Polyhedral Fe3O4 Hollow Spheres Using Hexamethylenetetramine as Structure-Directing Agent  

作  者:Zhu, Yuanna; Yang, Ping; Cao, Yongqiang; Wang, Yingzi; Xu, Chuanchuan; Wang, Dan; Zhao, Jie

机构地区:School of Material Science and Engineering, University of Jinan, 250022, Jinan, P. R. China

出  处:Journal of Nanoscience and Nanotechnology2017,17(2),1413-1419,7

语  种:外文

出 版 国:美国

摘  要:Polyhedral Fe<sub>3</sub>O<sub>4</sub> hollow spheres were synthesized using hexamethylenetetramine as structure-directing agent and the effect of hexamethylenetetramine on the morphology was investigated in detailed. The comparison for samples prepared with and without hexamethylenetetramine indicated that hexamethylenetetramine played a vital role in the formation process of the hollow polyhedral structure. The formation process and growth mechanism of Fe<sub>3</sub>O<sub>4</sub> spheres with hollow polyhedral morphology were preliminarily explored according to a detailed time-dependent morphology and structure evolution. It was deduced that the hollow polyhedral structure can be ascribed to the cooperation of oriented aggregation and Ostwald ripening mechanisms. The as-prepared Fe<sub>3</sub>O<sub>4</sub> hollow spheres with polyhedral structures which possess high magnetization saturation value (73 emu/g) at room temperature, large cavity and huge specific surface area (57.12 m<sup>2</sup>��g<sup>�C1</sup>) are expected to have wide potential applications, for example in the drug delivery process, magnetic separation and waste treatment in the future.

关 键 词:Fe3O4 Spheres  Hollow  Polyhedral  Structure-Directing Agent 

 

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