Stable ultraviolet photoluminescence from sol-gel silica containing nano-sized SiC/C powder

被引：5
作者：
Fu, ZP
Ning, JQ
Yang, BF [1 ]
Wu, W
Pan, HB
Xu, PS
机构：
[1] Univ Sci & Technol China, Dept Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China
[2] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230026, Anhui, Peoples R China
来源：
MATERIALS LETTERS | 2003年 / 57卷 / 13-14期
关键词：
photoluminescence; silica; silicon carbide;
D O I：
10.1016/S0167-577X(02)01103-5
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
PL band of 340 nm has been observed from sol-gel silica with and without the addition of nano-sized SiC/C powder. With the increasing of annealing temperature, the intensity of the 340-nm PL band in pure silica decreases remarkably, while that in SiC/C powder-added silica is enhanced. Based on the Fourier-transform infrared (FTIR) absorption and X-ray photoelectron spectroscopy (XPS) spectra, the authors suggest that the addition of nano-sized SiC/C powder into porous silica (PSO) will strengthen the silica network and prevent it from shrinking during heat treatment. By this mechanism, the 340-nm PL band is stabilized by the presence of SiC/C powder. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：1910 / 1914
页数：5
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