[J. Cryst. Growth]Template-free synthesis of molybdenum oxide-based hierarchical microstructures at low temperatures
Authors:Liang Fang Yuying Shu Aiqin Wang and Tao ZhangWeb Release Date:Available online 31 July 2008
DOI: [url=http://dx.doi.org/10.1016/j.jcrysgro.2008.07.080]10.1016/j.jcrysgro.2008.07.080[/url]
Abstract:Abstract
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 °C. The as-synthesized uniform microstructures, which are collected from the 0.9 mol/L molybdenum solutions after 14 h at 75 °C, are 35–40 μm in diameter, and they are constructed by nanoscale blocks of 300–400 nm in width and 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, α-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.
Keywords: A1. Crystal morphology; A1. Hierarchical microstructures; A1. Nanostructures; A2. Hydrothermal crystal growth; B1. Oxides
PACS classification codes: 81.05.je; 81.07.Bc; 81.10.Dn; 81.16.Be; 81.16.Dn
Link:[url]http://dx.doi.org/10.1016/j.jcrysgro.2008.07.080[/url]
Remarks:是和Green Synthesis and Characterization of Anisotropic Uniform Single-Crystal α-MoO3 Nanostructures的相关的部分工作。两篇文章从两个不同的工作重点入手，系统考察了过渡金属氧化物氧化钼的合成。
第一篇文章的链接：
[url]http://pubs.acs.org/cgi-bin/abstract.cgi/jpccck/2007/111/i06/abs/jp065791r.html[/url]
[url]http://pubs.acs.org/cgi-bin/article.cgi/jpccck/2007/111/i06/pdf/jp065791r.pdf[/url]
该篇文章虽然令自己非常满意，但是因为和第一篇文章之间的关联，创新性受到一定程度的影响，只能发在专业性强的杂志上。该杂志的投稿虽然没有实质性的评审意见，但是时间周期被拖得非常长，过程中也让自己对科研和自身多了很多反思。
如果那位同仁对该文章内容方面感兴趣，可以相互切磋，还请不吝赐教。也希望能从其中有所获得。
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