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Method for preparing Nano dendritic crystal of lead sulfide

A dendrite and lead sulfide technology, applied in the field of preparation of lead sulfide nano-dendrites, can solve problems such as complicated process, and achieve the effects of simple method, favorable industrial production and low reaction temperature

Inactive Publication Date: 2007-05-09
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Kuang et al. prepared PbS nanodendrites for the first time under hydrothermal conditions at 120°C (Daibin Kuang, Anwu Xu, Yueping Fang, et al.Adv.Mater, 2003, 15, 1747.), and Zhou et al. "Star-shaped" PbS nanodendrites (Guangiun Zhou, Mengkai Zhiliang Xu, et al.J.Phys.Chem, 2006, 110, 6543.), Zhang et al. prepared PbS nanodendrites at room temperature (Zhihua Zhang, Si Huey Lee, Jagadese J.Vittal, et al.J.Phys .Chem, 2006, 110, 6649.) crystal, but the above method needs to synthesize a precursor of organic lead salt before preparation, and the process is more complicated
There is no report on the preparation of PbS nanodendrites at low temperature using a simple method

Method used

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  • Method for preparing Nano dendritic crystal of lead sulfide
  • Method for preparing Nano dendritic crystal of lead sulfide

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] At room temperature, 0.8mmol sodium dodecylsulfonate, 0.01mmol molecular weight of 10000 polyvinylpyrrolidone, 0.004mol lead acetate and 0.012mol thioacetamide were stirred and mixed in 100ml water to form a white colloidal mixed solution, and the solution was placed in 80 ℃ for 12 hours under stirring in a water bath to obtain a black precipitate, which was filtered and dried to obtain lead sulfide nano dendrites. Figure 1 is the XRD pattern of the lead sulfide nanodendrites prepared in this example, and the transmission electron microscope image (TEM) of the lead sulfide nanodendrites is shown in Figure 2.

Embodiment 2

[0014] Stir and mix 0.4mmol sodium dodecylsulfonate, 0.04mmol polyvinylpyrrolidone, 0.002mol lead acetate and 0.024mol thioacetamide in 100ml water at room temperature to form a white colloidal mixture, and place the solution in a water bath at 80°C The reaction was carried out under moderate stirring for 24 hours to obtain a black precipitate, which was filtered and dried to obtain lead sulfide nano dendrites.

Embodiment 3

[0016] At room temperature, 1.6mmol sodium dodecylsulfonate, 0.006mmol molecular weight 70000 polyvinylpyrrolidone, 0.008mol lead acetate and 0.006mol thioacetamide were stirred and mixed in 100ml water to form a white colloidal mixed solution, and the solution was placed in 100 ℃ for 6 hours under stirring in a water bath to obtain a black precipitate, which was filtered and dried to obtain lead sulfide nano dendrites.

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Abstract

This invention discloses a method for preparing PBS branched nanoparticles. The method comprises: stirring sodium dodecyl sulfonate, poly (vinyl pyrrolidone), lead acetate and thioacetamide at room temperature in water to form white colloid-like mixed liquid, reacting in 80-100 deg.C water bath under stirring to obtain black precipitate, filtering and drying to obtain PBS branched nanocrystals. The method has such advantages as simple process, low reaction temperature, high yield, and low energy consumption.

Description

technical field [0001] The invention relates to a method for preparing lead sulfide nano dendrites. Background technique [0002] Lead sulfide (PbS) is an important semiconductor material with a narrow band gap (about 0.4lev) and a large excitation Bohr radius (about 18nm). When forming nanoclusters, its bandgap will widen to the visible region or even the ultraviolet region (see: S.Gallardo, M.Gutierrez, A.Henglein, et al.BerBunsen-Ges.Phys.Chem, 1989, 93, 1080. ). Therefore, PbS nanocrystals can be applied to electroluminescent devices such as light-emitting diodes. Quantum dot PbS also has good third-order nonlinear optical properties (see: Y. Wang, Acc. Chem. Res, 1991, 24, 133), which makes it have a wide application prospect in optical devices, such as optical conversion devices. Semiconductor dendritic nanostructure is a kind of supramolecular structure, which has attracted much attention due to its unique morphology, properties and potential applications. At prese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/46C30B29/60C01G21/21
Inventor 糜裕宏张孝彬
Owner ZHEJIANG UNIV