新型炭材料Issue(3)：230-235,6.
微波法合成SiC纳米线及其光致发光性质
Structural characterization and photoluminescence properties of SiC nanowires prepared by microwave method
摘要
Abstract
SiC nanowires were synthesized by a microwave-heating method at 1480 ° C for 80 min under vacuum, using silicon powder, silica dioxide powder and artificial graphite as raw materials. SEM, TEM and XRD were used to investigate the microstruc-ture of the samples and excitation light with wavelength of 240 nm was used to test the photoluminescence properties of the products. Results indicated thatβ-SiC can be synthesized directly without using a catalyst by the vapor-solid growth mechanism. The samples exhibited different morphologies and sizes at different zones due to the temperature differences. The products in an upper crucible were bright-green, relatively pure SiC, consisting of mainly nano-rods with a diameter of about 150 nm and small amount of SiC micro-crystals, and surface oxidation was not obvious. The products in other zones were grey-green with lots of SiC/SiO2 coaxial nanowires with a diameter around 20-50 nm and a SiO2 surface layer of thickness about 2 nm, and there was also some un-reacted graphite and silica dioxide. Both the SiC nano-rods and SiC/SiO2 coaxial nanowires exhibited a strong broad photoluminescence peak at a wavelength of about 390 nm and a high degree of blue-shift compared with the reported luminescence ofβ-SiC nano-mate-rials.关键词
微波法/碳化硅/纳米线/结构表征/光致发光Key words
Microwave/SiC/Nanowires/Structural characterization/Photoluminescence分类
化学化工引用本文复制引用
黄珊,王继刚,刘松,张玥晨,钱柳,梁杰..微波法合成SiC纳米线及其光致发光性质[J].新型炭材料,2015,(3):230-235,6.基金项目
新世纪优秀人才支持计划 （）
西藏自治区重点科技项目 （）
江苏省“青蓝工程”( NCET-12-0119) （ NCET-12-0119）
“六大人才高峰”(2013-JY-007).@@@@Program for New Century Excellent Talents in University （2013-JY-007）
Key Project of Science and Technology of Tibet Auton-omous Region （）
Qing-lan Project of Jiangsu Province (NECT-12-0119) （NECT-12-0119）
Summit of the Six Top Talents Program of Jiangsu Province (2013-JY-007) （2013-JY-007）
