摘要
以五水硝酸铋(Bi(NO3)3·5H2O)和硫脲为原材料,以乙二醇为溶剂,采用微波加热法制备了Bi2S3纳米花分级结构。利用X射线衍射仪、拉曼光谱、扫描电镜、透射电镜、高分辨率电镜和荧光光谱仪等仪器对材料进行表征。研究结果表明:150℃反应1.5 h所得纳米花由径向发散的纳米线构成,纳米线的长度达几个微米,是完整单晶结构。室温荧光光谱是峰值位于720 nm、从650 nm扩展到800 nm的荧光光谱带。纳米花的生长机制与自组织生长和材料本身易劈裂的性质相关。
The hierarchical Bi2S3 nanostructures were synthesised by a facile microwave assisted solvothermal method with Bi( NO3)3·5H2O and thiourea as raw materials,and ethylene glycol as solvent. The nanoflowers were characterized by X-ray diffraction,Raman spectra,scanning electron microscopy,transmission electron microscopy,high-resolution transmission electron microscopy and photoluminescence spectra. The results show that the nanoflowers synthesized at 150 ℃ for 1. 5 h are composed of nanowires,which grow radially from the center of the nanoflowers toward all directions. The nanowires are single-crystalline and the length of the nanowire is up to micrometers. The room temperature photoluminescence spectra show that there is a strong and broad photoluminescence band centered at about 720 nm in the wavelength range from 650 nm to 800 nm. The formation mechanism is ascribed to self-assembly and intrinsic splitting character of the Bi2S3 structure.
出处
《河南科技大学学报（自然科学版）》
CAS
北大核心
2015年第2期5-9,2,共5页
Journal of Henan University of Science And Technology:Natural Science
基金
国家自然科学基金项目(51302128)
河南省青年骨干教师基金项目(2013GGJS-189)
关键词
硫化铋
纳米花
微波法
光谱带
Bi2S3
nanoflower
microwave assisted
photoluminescence band
