Issue 5, 2003
From the journal:

Journal of Materials Chemistry

Size- and shape-tailored hydrothermal synthesis of YVO4 crystals in ultra-wide pH range conditions

Hao Wu,a   Huifang Xu,b   Qiang Su,a   Tianhu Chenb  and  Mingmei Wu*a  

* Corresponding authors

a State Key Laboratory of Photoelectronic Materials and Technologies, and School of Chemistry and Chemical Engineering, Sun Yat-Sen (Zhongshan) University, Guangzhou, P. R. China
E-mail: ceswmm@zsu.edu.cn

b Transmission Electron Microscopy Laboratory, Department of Earth and Planetary Science, University of New Mexico, 200 Yale Blvd., Albuquerque, USA

Abstract

Yttrium orthovanadate (YVO4) crystals have been prepared hydrothermally in both strongly acidic and basic media. The effects of vanadium source, acid, addition of sodium hydroxide, chelating reagent, and even solvent on the crystalline size and shape were explored using X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Models for the generation of YVO4 crystals in both acidic and basic media are proposed from the experimental results. The influence of alkaline concentration on the sizes and shapes of YVO4 crystals has been investigated, and it has been found that the addition of sodium hydroxide can reduce the crystal sizes of YVO4. Well-defined YVO4 microcrystals with clear facets have been prepared, and dispersed YVO4 nanograins and nanoflakes with dimensions of 5–50 nm have been obtained. Both the size and shape of YVO4 crystals can be tailored by changing the reaction conditions even though YVO4 crystals generally show a tetragonal growth habit due to its tetragonal crystallographic symmetry.

Graphical abstract: Size- and shape-tailored hydrothermal synthesis of YVO4 crystals in ultra-wide pH range conditions

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Article information

DOI
https://doi.org/10.1039/B210713A
Article type
Paper
Submitted
30 Oct 2002
Accepted
05 Mar 2003
First published
20 Mar 2003

J. Mater. Chem., 2003,13, 1223-1228

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Size- and shape-tailored hydrothermal synthesis of YVO4 crystals in ultra-wide pH range conditions

H. Wu, H. Xu, Q. Su, T. Chen and M. Wu, J. Mater. Chem., 2003, 13, 1223 DOI: 10.1039/B210713A

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