新型炭材料Issue(5)：404-408,5.
黄绿荧光碳化硅包覆石墨材料的制备与表征
Preparation and characterization of yellow-green fluorescence emitting SiC-encapsulated graphite
王云伟 1靳国强 2王英勇 1郭向云1
作者信息
- 1. 中国科学院山西煤炭化学研究所 煤转化国家重点实验室 山西 太原 030001
- 2. 中国科学院大学 北京 100049
- 折叠
摘要
Abstract
SiC-encapsulated graphite was prepared by carbonization of a mixture of expanded graphite and silica sol at 1 300 ℃for 6 h, heat treatment in air at 700 ℃ for 4 h to remove unreacted surface carbon and HCl-HF etching to remove silica. XRD, TGA, TEM and SEM were used to characterize the samples. Results indicated that the fluorescence emission of the SiC-encapsulated graphite shifts from blue to yellow-green light compared to pure SiC. This might be caused by a built-in potential near the junction between graphite and SiC, which makes the energy of the photogenerated electron released while returning to ground state lower than that of pure SiC.关键词
碳化硅/石墨/红移/黄绿色荧光Key words
SiC/Graphite/Red shift/Yellow-green photoluminescence分类
通用工业技术引用本文复制引用
王云伟,靳国强,王英勇,郭向云..黄绿荧光碳化硅包覆石墨材料的制备与表征[J].新型炭材料,2014,(5):404-408,5.
