Synthesis and characterization of SiO2/Gd2O3:Eu core-shell luminescent materials

被引：101

作者：

Liu, GX

Hong, GY ^{[1
]}

Sun, DX

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, Key Lab Rare Earht Chem & Phys, Changchun 130022, Peoples R China

[2] Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2004年 / 278卷 / 01期

关键词：

Gd2O3; Eu; core-shell; luminescent materials;

D O I：

10.1016/j.jcis.2004.05.013

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Europium-doped Gd2O3 with an average size of similar to15 nm was coated on the surface of preformed silica nanospheres by the wet chemical method. SEM and TEM photographs showed that SiO2/Gd2O3:Eu core-shell submicrospheres are obtained. XRD patterns indicated that the Gd2O3:Eu shell is crystalline after heat treatment. FTIR and XPS spectra showed that the Gd2O3:Eu shell is linked to the silica surface by forming a Si-O-Gd bond. Photoluminescence studies showed that the luminescent properties are still retained after coating on an inert silica core; additionally, we noted that the emitting peaks are broadened, which results from size effects and interface effects of nanocrystal. (C) 2004 Elsevier Inc. All rights reserved.

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页码：133 / 138

页数：6

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