Issue 6, 2010

Various self-assembled three-dimensional hierarchical architectures of La2(MoO4)3: controlled synthesis, growth mechanisms, luminescence properties and adsorption activities

Abstract

Tetragonal La2(MoO4)3 with various novel and complex 3D hierarchical architectures self-assembled from different building blocks were successfully synthesized by a hydrothermal method in EDTA-mediated processes. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and high resolution transmission electron microscopy (HRTEM) were employed to characterize the as-obtained products. It was found that morphology modulation could be easily realized simply by changing the amount of EDTA introduced into the reaction system. The amount of EDTA not only affected the substructures of the hierarchical structures, but also determined the size distributions of the final products. The formation mechanisms for different hierarchical architectures were proposed on the basis of a series of time-dependent experiments. An investigation on the photoluminescence (PL) properties of La2(MoO4)3:Eu with different morphologies revealed that the optical properties were strongly correlated with the morphology and size. Furthermore, as highlighted by the fascinating hierarchical structures of La2(MoO4)3, the potential application of La2(MoO4)3 as an absorbent in water treatment was also investigated for the first time. Possible reasons responsible for the differences in photoluminescence behaviors and absorption activities of different hierarchical architectures were discussed.

Graphical abstract: Various self-assembled three-dimensional hierarchical architectures of La2(MoO4)3: controlled synthesis, growth mechanisms, luminescence properties and adsorption activities

Supplementary files

Article information

Article type
Paper
Submitted
08 Dec 2009
Accepted
23 Feb 2010
First published
06 May 2010

Nanoscale, 2010,2, 995-1005

Various self-assembled three-dimensional hierarchical architectures of La2(MoO4)3: controlled synthesis, growth mechanisms, luminescence properties and adsorption activities

L. Xu, C. Lu, Z. Zhang, X. Yang and W. Hou, Nanoscale, 2010, 2, 995 DOI: 10.1039/B9NR00392D

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