L-胱氨酸辅助合成Bi_2S_3纳米片状球和花状结构(英文)

L-Cystine-Assisted Synthesized Bi_2S_3 Spherical Patterns with Well-Aligned Nanoflakes and Flowerlike Structures

以硝酸铋[Bi(NO)3·5H2O]和L-胱氨酸为反应原料,采用溶剂热法制备出Bi2S3纳米片状球和花状结构。L-胱氨酸(一种非常普遍和实用的氨基酸)作为硫源,在实验过程中不释放出刺激性气味(H2S)。利用X-射线衍射(XRD)、扫描电子显微镜(SEM)对所合成的产物的晶型结构、组成和表面形貌等进行了表征。结果表明:所合成的产物为典型的Bi2S3正交结构;在170°C条件下反应12h,以DMF为溶剂能够得到Bi2S3纳米片状球和花状结构。根据实验结果,对所合成Bi2S3的可能形成机理进行了简单探讨。

L-Cystine was applied successfully as a novel source of sulfur for Sb2S3 nanoribbons growth at 180 oC for 24 h in a mixed solution made of ethylene glycol and distilled water. The nanoribbons were usually tens of microns in length, typically 100-300 nm in width. The structure of the nanoribbons was determined to be of the orthorhombic. A reasonable mechanism was proposed for the growth of Sb2S3 nanoribbons. The as-obtained Sb2S3 products were examined by various techniques including X-ray powder diffraction (XRD) and field-emission scanning electron microscopy (FESEM).