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LaPO4 ∶ Eu3+@SiO2 核壳结构发光纳米棒的制备与表征
Preparation and Characterization of LaPO4 ∶ Eu3+@SiO2 Core-shell Luminescent Naonrods
- 发光学报 2011年32卷第5期 页码：466-470
- 作者机构：
长春理工大学 化学与环境工程学院,吉林 长春,130022
- 作者简介：
- 基金信息：国家自然科学基金(51072026)();吉林省科技发展计划(20090528)资助项目()
DOI：10.3788/fgxb20113205.0466
中图分类号： O614;O482.31收稿日期：2010-11-07，
修回日期：2010-12-13，
网络出版日期：2011-05-22，
纸质出版日期：2011-05-22
- 稿件说明：
移动端阅览
刘桂霞, 李若兰, 董相廷, 王进贤. LaPO<sub>4</sub> ∶ Eu<sup>3+</sup>@SiO<sub>2</sub> 核壳结构发光纳米棒的制备与表征[J]. 发光学报, 2011,32(5): 466-470
LIU Gui-xia, LI Ruo-lan, DONG Xiang-ting, WANG Jin-xian. Preparation and Characterization of LaPO<sub>4</sub> ∶ Eu<sup>3+</sup>@SiO<sub>2</sub> Core-shell Luminescent Naonrods[J]. Chinese Journal of Luminescence, 2011,32(5): 466-470
刘桂霞, 李若兰, 董相廷, 王进贤. LaPO<sub>4</sub> ∶ Eu<sup>3+</sup>@SiO<sub>2</sub> 核壳结构发光纳米棒的制备与表征[J]. 发光学报, 2011,32(5): 466-470 DOI： 10.3788/fgxb20113205.0466.
LIU Gui-xia, LI Ruo-lan, DONG Xiang-ting, WANG Jin-xian. Preparation and Characterization of LaPO<sub>4</sub> ∶ Eu<sup>3+</sup>@SiO<sub>2</sub> Core-shell Luminescent Naonrods[J]. Chinese Journal of Luminescence, 2011,32(5): 466-470 DOI： 10.3788/fgxb20113205.0466.
摘要
在不加任何表面活性剂的条件下
通过水热法直接合成了LaPO
4
∶ Eu
3+
纳米棒
并采用溶胶-凝胶法在其表面修饰了一层SiO
2
得到了LaPO
4
∶ Eu
3+
@SiO
2
纳米棒。XRD分析表明
样品包覆前后均属于单斜晶系的独居石型的LaPO
4
。FTIR分析表明
LaPO
4
∶ Eu
3+
粒子与SiO
2
是以化学键的形式结合在一起。由TEM照片可见
所得LaPO
4
∶ Eu
3+
样品为直径约20 nm、长度达300~500 nm的长径比较大的纳米棒。通过改变TEOS的加入量得到了不同包覆层厚度的LaPO
4
∶ Eu
3+
@SiO
2
纳米棒。荧光光谱分析表明:以259 nm作为激发波长
LaPO
4
∶ Eu
3+
发光纳米棒的主发射峰位于591 nm
为Eu
3+
的特征橙红光发射
归属于Eu
3+
的
5
D
0
7
F
1
跃迁。随着SiO
2
包覆层厚度的增加
样品的激发光谱和发射光谱的强度逐渐减弱
峰形和谱峰的位置没有明显的变化。
Abstract
LaPO
4
∶ Eu
3+
luminescence nanorods were prepared via a hydrothermal method without any surfactants
then an uniform SiO
2
layer was coated on the surface of LaPO
4
∶ Eu
3+
nanorods by sol-gel method. At lasts LaPO
4
∶ Eu
3+
@SiO
2
core-shell structural luminescence nanorods were achieved. XRD patterns show that the uncoated and coated samples are all monclinic LaPO
4
crystals. FTIR spectra indicate that LaPO
4
∶ Eu
3+
is linked with SiO
2
by chemical bond. TEM images reveal that the LaPO
4
∶ Eu
3+
samples are one-dimensional nanorods with a diameter of 20 nm and a length of 300~500 nm. The coating thickness of SiO
2
can be controlled by the concentration of TEOS. The results of photoluminescence properties show that the main emission peak of LaPO
4
∶ Eu
3+
nanorods is near 591 nm
which is the characteristic orange red light corresponding to
5
D
0
7
F
1
transition of Eu
3+
under 259 nm excitation. The PL intensity of the samples become weak with the increasing of the coating thickness
but the shape and the position of the peaks are not changed.
关键词
Keywords
references
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