无模板合成海胆状薄水铝石超结构及其形成机理

doi:10.3724/SP.J.1077.2010.01175

无机材料学报 ›› 2010, Vol. 25 ›› Issue (11): 1175-1179.DOI: 10.3724/SP.J.1077.2010.01175 CSTR: 32189.14.SP.J.1077.2010.01175

无模板合成海胆状薄水铝石超结构及其形成机理

徐冰, 王晶, 于洪波, 高宏

(大连交通大学辽宁省无机超细粉体制备及应用重点实验室, 大连 116028)

收稿日期:2010-02-05 修回日期:2010-03-21 出版日期:2010-11-20 网络出版日期:2010-11-01
基金资助:
国家自然科学基金(20806011); 辽宁省教育厅计划(2008S035)

Template-free Synthesis and Formation Mechanism of Urchin-like Boehmite Superstructure

XU Bing, WANG Jing, YU Hong-Bo, GAO Hong

(Liaoning Key Laboratory for Fabrication and Application of Superfine Inorganic Powder, Dalian Jiaotong University, Dalian116028, China)

Received:2010-02-05 Revised:2010-03-21 Published:2010-11-20 Online:2010-11-01
Supported by:
National Nature Science Foundation of China (20806011); Science and Technology Funds of Educational Department of Liaoning Province (2008S035)

摘要/Abstract

摘要： 在乙醇-水溶液体系中, 在无模板剂的情况下, 水热合成由纳米棒自组装成的独特海胆状薄水铝石(AlOOH)超结构. 采用XRD、SEM、TEM和SAED对其物相结构和形貌进行了分析, 讨论了铝盐前驱体、醇水比例和反应温度对产物形貌的影响. 研究结果表明: 当铝盐前驱体为AlCl₃·6H₂O, 醇水体积比为1:2, 反应温度为200℃时, 得到形貌规则、分散均匀的三维海胆状薄水铝石超结构, 该海胆状超结构是由直径60~80nm的纳米棒自组装而成, 海胆球直径为6~10μm, 选区电子衍射表明该海胆状薄水铝石的多晶本质. 在薄水铝石海胆状超结构的形成过程中, 定向附着机制起到关键性作用.

关键词: 水热合成, 薄水铝石, 海胆状, 超结构

Abstract: Novel urchin-like boehmite (AlOOH) superstructures consisting of nanorods were successfully synthesized by a template-free hydrothermal synthetic route in an ethanol-water solution. The crystal structures and the morphologies of boehmites were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM) and selected area electron diffraction (SAED). The effects of the precursors, the volume ratio of EtOH/H₂O and reaction temperatures on the morphologies were also discussed. It is shown that the 3D urchin-like boehmite of uniform morphology and good dispersibility is prepared using AlCl₃·6H₂O as the precursor at 200℃ with the volume ratio (EtOH/H₂O) of 1:2. The diameter of the urchin-like boehmite is 6-10μm, which is consisted of nanorods with the diameter of 60-80nm. The SAED pattern reveals the polycrystalline nature of the urchin-like boehmite. The oriented attachment mechanism plays a key role on the formation of urchin-like boehmite superstructures.

Key words: hydrothermal synthesis, boehmite, urchin-like, superstructure

中图分类号:

TB321

徐冰, 王晶, 于洪波, 高宏. 无模板合成海胆状薄水铝石超结构及其形成机理[J]. 无机材料学报, 2010, 25(11): 1175-1179.

XU Bing, WANG Jing, YU Hong-Bo, GAO Hong. Template-free Synthesis and Formation Mechanism of Urchin-like Boehmite Superstructure[J]. Journal of Inorganic Materials, 2010, 25(11): 1175-1179.

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无模板合成海胆状薄水铝石超结构及其形成机理

Template-free Synthesis and Formation Mechanism of Urchin-like Boehmite Superstructure

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