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Journal of Materials Science

, Volume 44, Issue 23, pp 6356–6362 | Cite as

Temperature-controlled assembly and morphology conversion of CoMoO4·3/4H2O nano-superstructured grating materials

  • Jing Zhao
  • Qing-Sheng WuEmail author
  • Ming Wen
Article

Abstract

The regular and homogeneous single-crystal CoMoO4·3/4H2O nanorods, with the diameters ca. 100–300 nm and lengths ca. 8–15 μm, have been successfully prepared by a simple and facile precipitation method. Their morphology conversion from broom-like to cage-like structure has been firstly reported through controlling the reaction temperature. The broom-like microbunches were obtained at 50 °C while at 80 °C, dispersive nanorods can be prepared. As the temperature reached 90 °C, the morphology of the products converted to cage-like microspheres. SEM results show that the reaction temperature has a critical role in both the formation of the products and their morphologies. The UV–visible diffuse reflectance absorbance spectra of the products display two intense, broad absorbance bands cover almost the whole ultraviolet and visible region except for a narrow region around 450 nm, which is in the region for purple light. Based on the experimental results, a possible formation mechanism was also proposed. The synthesis strategy is simple, facile, mild, and has a good reproducibility. The as-prepared products may have potential applications in optics, catalysis, and grating materials.

Keywords

Select Area Electron Diffraction Molybdenum Trioxide CoMoO4 Metal Molybdate Purple Precipitation 

Notes

Acknowledgements

We thank the financial support of the National Natural Science Foundation (No. 50772074) of China, the State Major Research Plan (973) of China (No. 2006CB932302), the Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials (No. 2009KF04), the key program for basic research of Shanghai ST committee (No. 09JC1414100), and the Nano-Foundation of Shanghai in China (No. 0852nm01200).

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  1. 1.Department of ChemistryTongji UniversityShanghaiChina
  2. 2.Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsFudan UniversityShanghaiPeople’s Republic of China

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