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题名: Template-free synthesis of molybdenum oxide-based hierarchical microstructures at low temperatures
作者: Fang, Liang1, 2;  Shu, Yuying1;  Wang, Aiqin1;  Zhang, Tao1
通讯作者: 张涛
关键词: Crystal morphology ;  Hierarchical microstructures ;  Nanostructures ;  Hydrothermal crystal growth ;  Oxides
刊名: JOURNAL OF CRYSTAL GROWTH
发表日期: 2008-10-15
DOI: 10.1016/j.jcrysgro.2008.07.080
卷: 310, 期:21, 页:4593-4600
收录类别: SCI
文章类型: Article
部门归属: 15
项目归属: 1501
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Crystallography ;  Materials Science, Multidisciplinary ;  Physics, Applied
研究领域[WOS]: Crystallography ;  Materials Science ;  Physics
英文摘要: Molybdenum oxide-based hierarchical microstructures assembled radially by anisotropic nanostructures (nanoplates/microprisms/nanorods) have been synthesized at low temperatures for the first time via a facile template-free hydrothermal approach. The influence of hydrothermal temperature, time, concentration of the peroxomolybdic acid solution, and additives on the morphology of products has been investigated. It has been found that the morphology of urchin-shaped microstructures of peroxo-modified molybdenum oxide hydrates can be controlled in the temperature range of 65-75 degrees C. The as-synthesized uniform microstructures, which are collected from the 0.9 mol/L molybdenum solutions after 14h at 75 degrees C, are 35-40 mu m in diameter, and they are constructed by nanoscale blocks of 300-400 nm in width and similar to 190 nm in thickness. The dimensions of microstructures and their building blocks are dramatically magnified when the molybdenum concentration is reduced, while those dimensions can be efficiently decreased by adding small quantities of HNO3 or LiNO3 into the precursor solution. By moderate calcination, alpha-MoO3 With a hierarchical microstructure can be achieved. The possible formation mechanism of urchin-shaped microstructures is discussed using the results of UV-visible spectroscopy and electron microscopy. (c) 2008 Elsevier B.V. All rights reserved.
关键词[WOS]: FIELD-EMISSION PROPERTIES ;  ONE-DIMENSIONAL NANOSTRUCTURES ;  NANOWIRE ARRAYS ;  MOO3 ;  NANOBELTS ;  NANORODS ;  GROWTH ;  NANOTUBES ;  TRIOXIDE ;  MORPHOLOGY
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000260988600020
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/100843
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

Recommended Citation:
Fang, Liang,Shu, Yuying,Wang, Aiqin,et al. Template-free synthesis of molybdenum oxide-based hierarchical microstructures at low temperatures[J]. JOURNAL OF CRYSTAL GROWTH,2008,310(21):4593-4600.
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