摘要
以L-胱氨酸为硫源和结构导向剂,采用L-胱氨酸辅助合成法制备了样品Bi2S3。X射线衍射分析表明:所合成的产物为正交相Bi2S3,其晶胞常数为a=1.1141nm,b=1.1304nm,c=0.3978nm。由X射线光电能谱的分析得知Bi与S的摩尔比为2.0:2.9。利用场发射扫描电子显微镜对所合成的产物的表面形貌进行了表征,结果表明:所合成的Bi2S3为排列规整的纳米片状结构,片厚约20nm;反应时间对Bi2S3的结晶性和形貌控制有着非常重要的影响。最后对所合成的Bi2S3的形成机理进行了探讨。
Bismuth sulfide （Bi2S3） with were synthesized by the L-cystine-assisted approach in the presence of L-cystine, which served as both the sulfur source and the directing molecule in the formation of Bi2S3 nanostructures. The X-ray powder diffraction pattern shows that the products are orthorhombic Bi2S3 phase with cell constants as a = 1.114 1 nm, b = 1.130 4 nm, c = 0.397 8 nm. The quantification of X-ray photoelectron spectra analysis peaks gives a mole ratio of 2.0：2.9 for Bi to S. Field-emission scanning electron microscopy photographs reveal that the structure of the as-prepared Bi2S3 consists of flowerlike patterns with well-aligned nanoflakes, and the thickness of nanoflakes is approximately 20 nm. The reaction duration plays a key role in the crystallization and morphology-controlled synthesis of Bi2S3 crystallites. The formation mechanism for the Bi2S3 flowerlike with well-aligned nanoflakes is also discussed.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2009年第12期2102-2107,共6页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金(50772075)资助项目
