以CuCl_2·2H_2O为铜源,N,N-二甲基甲酰胺(N,N-dimethylformamide,DMF)为溶剂,分别以L-半胱氨酸、硫脲、硫代乙酰胺为硫源采用溶剂热法在130℃下反应8h得到了不同形貌的硫化铜(CuS)纳米粉体.用X射线粉末衍射仪、X射线光电子能谱、场发射扫描电子显微镜、透射电子显微镜、紫外可见吸收光谱手段对粉体的结构、形貌、成分及光学性能进行表征.研究表明,硫源对产物的结构和形貌有较大的影响.采用L-半胱氨酸为硫源得到的产物多呈纳米颗粒无序堆积的无定形态,而采用硫脲和硫代乙酰胺为硫源得到的是纳米棒组成的球状粉体.讨论了不同硫源对CuS粉体的形成及其形貌的影响,并对各种形貌CuS粉体的形成机理进行了简单的探讨.
Copper sulfide powders were successfully synthesized by solvothermal method with CuCl_2·2H_2O as the copper source,N,N-dimethylformamide as the reaction medium,L-cysteine,thiourea,thioacetamide as the sulfur source respectively at 130℃ for 8h.The crystallinity,phase structure,morphology,composition and optical property of the as-prepared samples were investigated by X-ray diffraction(XRD),X-ray photo-electron spectroscopy(XPS),field-emission scanning electron microscopy(FESEM),Transmission electron microscope(TEM) and UV-vis absorption spectroscopy respectively.The results showed that structure and morphology of the products were significantly influenced by the sulfur source.The CuS product synthesized in dimethylformamide(DMF) with L-cysteine as the sulfur source was amorphous stacked by numerous nanoparticles disorderly,but those synthesized with thiourea and thioacetamide as the sulfur source respectively were microspheres composed of large numbers of nanorods.The morphology and form of CuS synthesized with different sulfur sources were discussed.And the possible growth mechanism of products with different morphologies was expatiated based on the experimental results.
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