L-Cysteine-Assisted Tunable Synthesis of PbS of Various Morphologies

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• 作者：Shenglin Xiong ; Baojuan Xi ; Dechen Xu ; Chengming Wang ; Xiaoming Feng ; Hongyang Zhou ; Yitai Qian
• 刊名：Journal of Physical Chemistry C
• 出版年：2007
• 出版时间：November 15, 2007
• 年：2007
• 卷：111
• 期：45
• 页码：16761 - 16767
• 全文大小：760K
• 年卷期：v.111,no.45(November 15, 2007)
• ISSN：1932-7455

文摘

This article describes a facile L-cysteine-assisted solvothermal method in a mixed solution made ofethylenediamine (en) and distilled water for the large-scale synthesis of various PbS 1D and 3D novelnanostructures. By varying process parameters such as the molar ratio of Pb(OAc)₂ to L-cysteine (reactants),the volume ratio of water to ethylenediamine, and the reaction temperature, a variety of 3D architecturalstructures and a 1D wirelike structure can be controllably synthesized in large quantities. On the basis ofearly arrested growth (nanowires), a reasonable possible mechanism for the growth of PbS dendritic structureshas been proposed. The as-prepared PbS products were examined using diverse techniques including X-raypowder diffraction (XRD), field-emission scanning electron microscopy (FESEM), transmission electronmicroscopy (TEM), selected-area electron diffraction, high-resolution TEM, Raman spectroscopy, andphotoluminescence emission.