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低温水热前驱物技术制备单晶PbS纳米片
引用本文:胡寒梅,邓崇海,黄显怀,李 燕,孙 梅,张克华.低温水热前驱物技术制备单晶PbS纳米片[J].无机化学学报,2007,23(8):1403-1408.
作者姓名:胡寒梅  邓崇海  黄显怀  李 燕  孙 梅  张克华
作者单位:1. 安徽建筑工业学院材料与化学工程学院,合肥,230022
2. 合肥学院化学与材料工程系,合肥,230022
3. 安徽建筑工业学院环境工程学院,合肥,230022
基金项目:国家自然科学基金;安徽省教育厅自然科学基金;安徽省高校青年教师科研项目;安徽建筑工业学院博士启动基金
摘    要:以层状的铅(Ⅱ)-硫脲配合物为前驱体,在130 ℃反应12 h水热分解得到高产量的半导体单晶PbS二维纳米片,产品用XRD、TEM、SEM、ED、XPS进行了表征,单晶PbS纳米片的二维尺寸为0.6~3 μm,厚度为2~4 nm,沿着ab平面生长。紫外吸收光谱和光致发光光谱表明二维PbS纳米片的量子尺寸效应非常显著。对可能的生长机理进行了探讨。

关 键 词:硫化铅    水热技术    前驱体    纳米片
文章编号:1001-4861(2007)04-1403-06
修稿时间:2007-04-182007-05-31

Hydrothermal Precursor Approach to Single-crystal PbS Nanosheets at Low Temperature
HU Han-Mei,DENG Chong-Hai,Huang Xian-Huai,LI Yan,SUN Mei and ZHANG Ke-Hua.Hydrothermal Precursor Approach to Single-crystal PbS Nanosheets at Low Temperature[J].Chinese Journal of Inorganic Chemistry,2007,23(8):1403-1408.
Authors:HU Han-Mei  DENG Chong-Hai  Huang Xian-Huai  LI Yan  SUN Mei and ZHANG Ke-Hua
Abstract:Semiconductor PbS single-crystal nanosheets with micrometer-scale lateral dimensions have been synthesized on a large scale by hydrothermal decomposition of the lamellar precursor-Pb(Ⅱ)-thiourea complexes at a low temperature of 130 ℃ for 12 h. XRD, TEM, SEM, electron diffraction (ED) and XPS were used to characterize the final product. The products are sheet-like with rectangle lateral dimensions in the range of 0.6~3 μm and thickness of 2~4 nm which grow along the a and b axes two-dimensional (2D) direction simultaneously.UV-Vis absorption and Photoluminescence (PL) spectra reveal that the as-prepared products have shown considerably greater quantum size effects expected for the 2D ultrathin nanostructure. The possible formation mechanism has been proposed.
Keywords:PbS  hydrothermal technique  precursor  nanosheet
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