Synthesis of hafnium germanate (HfGeO4) particles: Impact of crystallization route on X/UV conversion properties

被引：5

作者：

Balencie, J. ^{[1
]}

Levy, L. ^{[2
]}

Hochepied, J. -F ^{[1
]}

机构：

[1] Ecole Mines Paris PARISTECH, Ctr Energy & Proc, Lab Colloidal Syst Ind Proc, F-75006 Paris, France

[2] Nanobiotix, F-75012 Paris, France

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2008年 / 112卷 / 02期

关键词：

Hafnium germanate; X/UV conversion; Precipitation; Hydrothermal synthesis; Crystallization;

D O I：

10.1016/j.matchemphys.2008.05.087

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The crystallization route - calcination or hydrothermal ripening - of an amorphous hafnium and germanium oxide coprecipitate determines the X/UV conversion properties of the resulting hafnium germanate (HfGeO4). The calcination of the amorphous precipitate leads to micrometric aggregated particles exhibiting strong X/UV conversion whereas its hydrothermal crystallization resulted in well individualized nanoparticles with no X/UV conversion property. To explain these phenomena, the crystalline structure and chemical composition of the final products were investigated with X-ray diffraction (XRD) and inductively coupled plasma-mass spectrometry (ICP-MS). The key result is that germanium is partially solubilized from the amorphous precursor in hydrothermal conditions, resulting in the crystallization of a Ge deficient hafnium germanate possessing no X/UV conversion properties. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：546 / 550

页数：5

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