L-胱氨酸辅助合成纳米片状硫化铋(英文)  

L-CYSTINE-ASSISTED SYNTHESIS OF BISMUTH SULFIDE WITH WELL-ALIGNED NANOFLAKES

作　　者：钟家松[1] 向卫东[1,2] 蔡文[2] 刘丽君[1] 杨昕宇[1] 梁晓娟[1] 

机构地区：[1]温州大学化学与材料工程学院,浙江温州325035 [2]同济大学材料科学与工程学院,上海200092

出　　处：《硅酸盐学报》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

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.

关 键 词：L-胱氨酸 硫化铋 溶剂热法 纳米结构 

分 类 号：O611[理学—无机化学] TB383[理学—化学]