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Synthesis and Properties of Mn2+-doped Zn2GeO4and Metal Oxides Nanomaterials

Author: LiBo
Tutor: XingYan
School: Northeast Normal University
Course: Physical and chemical
Keywords: Zinc orthogermanate Hierarchical architectures Copper oxide Electrochemicalproperties Tungsten oxide
CLC: TB383
Type: Master's thesis
Year: 2012
Downloads: 19
Quote: 0
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Abstract


Germanate system is considered to be very promising luminescent materials because of its good chemical stability and luminous performance, through different activated ion doped luminescent materials. Polyoxometallate Zn2GeO4and Mn2+-doped Zn2GeO4have been extensively studied due to their peculiar property of optics. Reports on nanomaterials of Zn2GeO4are less relatively, so how to synthesis of Zn2GeO4nanomaterials with different morphologies has become the focus of modern research.Metal oxides nanomaterials have been an important part of scientific research in modern nanomaterials, for their peculiar and important electric, optics and catalysis properties. Among of the most metal oxides, copper oxides and tungsten oxides are of particular concern as a result of unique structure as well as in electrical, optical and other important aspects. It is significant to synthesize copper oxides and tungsten oxides nanomaterials with peculiar structure and shapes to control their morphologies and properties because of important relation between nanomaterials’structure and properties. The main content of this paper as follows:1. Three-dimensional (3D) flowerlike hierarchical Zn2GeO4and Mn2+-doped Zn2GeO4microstructures were successfully prepared by a facile hydrothermal approach under the condition of using (CH2)6N4(HMT) as surfactant. Such flowerlike hierarchical Zn2GeO4microstructures with the average diameter of3～4μn were found to be constructed by abundant single crystalline nanorods of about90nm in diameter. The experimental results indicated that (CH2)6N4(HMT) played important roles for the formation of hierarchical Zn2GeO4. Formation mechanism in the growth processes and optics properties of hierarchical Zn2GeO4were studied systematically.2. CuO nanospindles have been prepared by the assisted of caping agent C19H42BrN (CTAB) and (CH2)6N4(HMT) complexing agent through a facile and simple hydrothermal process. The structures of the nanospindles are assembled by a lot of nanoparticles. We can get different morphology by regulating different pH of solution and discuss solvent for the influence of morphology by changing solvent. Meanwhile we study its property of electrochemistry.3. Nanocubes of WO3·H2O have been successfully synthesized by taking poly(vinyl pyrrolidone) PVP as guide agent of structure through a facile and simple hydrothermal process. It is found that PVP has significant effects on the nanocubes morphology of WO3, Properties of electrochemistry were also studied by us.

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