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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。
The sample Bi2S3 was prepared by L-cystine-assisted synthesis using L-cystine as sulfur source and structure-directing agent. X-ray diffraction analysis shows that the synthesized product is the orthogonal phase Bi2S3, with unit cell constants of a = 1.1141 nm, b = 1.1304 nm and c = 0.3978 nm. The X-ray photoelectron spectroscopy analysis showed that the molar ratio of Bi to S was 2.0: 2.9. The surface morphology of the synthesized product was characterized by field emission scanning electron microscopy. The results showed that the prepared Bi2S3 was ordered nanosheet structure with a thickness of about 20 nm. The reaction time of Bi2S3 on the crystallinity and morphology Control has a very important influence. Finally, the formation mechanism of Bi2S3 was discussed.