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Hydrothermal Synthesis and Formation Mechanism of Micrometer-sized MoO2 Hollow Spheres
Cheng-hua Guo ,Gui-jun Zhang ,Zhu-rui Shen ,Ping-chuan Sun ,Zhong-yong Yuan ,Qing-hua Jin* ,Bao-hui Li ,Da-tong Ding ,Tie-hong Chen*
Author NameAffiliation
Cheng-hua Guo College of Chemistry and College of Physics, Nankai University, Tianjin 300071, China 
Gui-jun Zhang College of Chemistry and College of Physics, Nankai University, Tianjin 300071, China 
Zhu-rui Shen College of Chemistry and College of Physics, Nankai University, Tianjin 300071, China 
Ping-chuan Sun College of Chemistry and College of Physics, Nankai University, Tianjin 300071, China 
Zhong-yong Yuan College of Chemistry and College of Physics, Nankai University, Tianjin 300071, China 
Qing-hua Jin* College of Chemistry and College of Physics, Nankai University, Tianjin 300071, China 
Bao-hui Li College of Chemistry and College of Physics, Nankai University, Tianjin 300071, China 
Da-tong Ding College of Chemistry and College of Physics, Nankai University, Tianjin 300071, China 
Tie-hong Chen* College of Chemistry and College of Physics, Nankai University, Tianjin 300071, China 
Abstract:
Micrometer-sized MoO2 hollow spheres were synthesized hydrothermally with ammonium heptamolybdate tetrahydrate as molybdenum source, Cetyltrimethylammonium bromide as structure-directing agent and C2H5OH as reducing agent, respectively. The products were investigated by X-ray diffraction, thermo- gravimetry and differential thermal analysis, scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. A morphology transition of "blocks-solid spheres-hollow spheres" during the growth process was observed and the possible mechanism for the formation of MoO2 samples was proposed to be through a microscale Kirkendall effect.
Key words:  MoO2, Micrometer-sized hollow spheres, Cationic surfactants
FundProject:
MoO2微米空心球的水热合成及合成机理研究
郭成花 ,张贵军 ,沈铸睿 ,孙平川 ,袁忠勇 ,金庆华 ,李宝会 ,丁大同 ,陈铁红
摘要:
在阳离子表面活性剂的作用下,以钼酸铵为钼源,乙醇作为还 原剂合成了微米级MoO2空心球. 采用X射线粉末衍射、热重-差热、 扫描电子显微镜、透射电镜和X射线光电子能谱对合成的样品进行了 表征,并对MoO2空心球可能的形成机理进行了讨论. 在MoO2空心球 的形成过程中,发现了样品从"大块-实心球-空心球"的形貌转化过 程,空心球的形成机理可用微米尺度的Kirkendall效应解释.
关键词:  MoO2,微米空心球,阳离子表面活性剂
DOI:10.1360/cjcp2006.19(6).543.6
分类号: