Synthesis of Nano-sized Tabular Lindgrenite (Cu3(MoO4)2(OH)2) by Aqueous Precipitation

doi:10.3724/SP.J.1077.2010.10750

Abstract

Abstract: Lindgrenite (Cu₃(MoO₄)₂(OH)₂) nanocrystals were synthesized by simple aqueous precipitation at 60℃ , using Cu(NO₃)₂·6H₂O, Na₂MoO₄·2H₂O and NaOH as the starting materials. X-ray Diffraction ( XRD) patterns confirm the formation of pure Cu₃(MoO₄)₂(OH)₂ nano crystals, which belongs to the monoclin ic phase with calculated crystal parameters a = 0.53863nm, b = 1.40006nm, c = 0.56003nm, β = 98.47°, α = γ = 90° . The e nergy d ispersive X-ray spectrum (ED X ) analysis gives an approximate atomic ratio of 3 :2 :10 for Cu : Mo:O. The scanning electron microscope(SEM) and transmission electron microscop e (TEM) studies show that the as-prepared nanoparticles are well crystallized with tabular structure and t he interplanar distances of d ₀₂₁and d_ī ₂₁measured are 0. 435nm and 0.358nm , coinciding with the theoretical value. It can also be seen that the Cu₃(MoO₄)₂(OH)₂ has a good thermal stability and starts decomposing at 320℃ through thermogravimetric- differential thermal analysis (TG-DTA) . Moreover, the strong fluorescent property of the Cu₃(MoO₄)₂(OH)₂ is measured, with green emission peak at ca. 530nm upon excitation at ca. 369nm. Finally, a possible m e ch a nism for the formation of Cu₃(MoO₄)₂(OH)₂ nanocrysta ls is proposed.

Key words: lindgrenite (Cu₃(MoO₄)₂(OH)₂), aqueous precipitation, nanocrystals, characterization, t hermal stability, fluorescent property

CLC Number:

O782

JIANG Wen-Jun,FANG Jin,FAN Zhong-Yong,YANG Xu-Jie,LU Qi-Ting,HOU Yi-Bin. Synthesis of Nano-sized Tabular Lindgrenite (Cu₃(MoO₄)₂(OH)₂) by Aqueous Precipitation[J]. Journal of Inorganic Materials, 2011, 26(4): 438-442.

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Synthesis of Nano-sized Tabular Lindgrenite (Cu₃(MoO₄)₂(OH)₂) by Aqueous Precipitation

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