Short rod-like and peony-like lead sulfide nano-structure material and preparation method thereof

A nanostructure and nanostructure technology, which is applied in the field of preparing short rod-shaped and peony flower-shaped lead sulfide nanostructures, can solve the problems of complex reaction process, harsh chemical synthesis method conditions, cumbersome reaction device, etc. Uniform appearance and simple operation

Inactive Publication Date: 2011-01-12
CHANGCHUN UNIV OF SCI & TECH
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  • Claims
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Problems solved by technology

The disadvantage of these methods is that the reaction device is loaded down with trivial details, and the reaction process is comparatively complicated.
[0004]The above-mentioned chemical synthesis method is relatively harsh and has various defects, while the biological template method has many advantages such as mild conditions and simple operation, and has become the first choice for nanostructured materials in recent years. Research Hotspots

Method used

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  • Short rod-like and peony-like lead sulfide nano-structure material and preparation method thereof
  • Short rod-like and peony-like lead sulfide nano-structure material and preparation method thereof
  • Short rod-like and peony-like lead sulfide nano-structure material and preparation method thereof

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Embodiment 1

[0026] Embodiment 1: Preparation method of short rod-shaped lead sulfide nanostructures using DNA as template

[0027] 50mL of DNA solution with a concentration of 1mg / mL and 50mL of Pb(NO with a concentration of 50mM 3 ) 2 The aqueous solution was mixed and allowed to stand for 24h. The mixture was placed in a three-necked flask and heated in a water bath, and when it reached 40 °C, 50 mL of 0.4 M TAA aqueous solution was added dropwise (0.3 mL / s), stirred at a low speed, and heated to 70 °C for 5 min. Cool the three-neck flask to room temperature in a normal temperature water bath, centrifuge the obtained product at 5000-8000rpm for 20-30min, wash the precipitate obtained by centrifugation twice with deionized water and anhydrous methanol, and freeze-dry at -45°C to obtain DNA. short rod-like nanostructures as templates.

Embodiment 2

[0028] Example 2: Preparation method of peony flower-like lead sulfide nanostructure using DNA as template

[0029] 50mL of 2mg / mL DNA aqueous solution and 50mL of 50mM Pb(NO 3 ) 2 The aqueous solution was mixed and allowed to stand for 24h. The mixture was placed in a three-necked flask and heated in a water bath, and when it reached 40 °C, 50 mL of 0.4 M TAA aqueous solution was added dropwise (0.3 mL / s), stirred at a low speed, and heated to 70 °C for 5 min. Cool the three-neck flask to room temperature in a normal temperature water bath, centrifuge the obtained product at 5000-8000rpm for 20-30min, wash the precipitate obtained by centrifugation twice with deionized water and anhydrous methanol, and freeze-dry at -45°C to obtain DNA. peony flower-like nanostructures as templates.

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Abstract

The invention a short rod-like and peony-like lead sulfide nano-structure material and a preparation method thereof, belonging to the technical field of nano materials. The preparation method of the short rod-like and peony-like lead sulfide nano-structure material comprises the following steps of: preparing lead sulfide nano materials by directly taking biological nano-structure DNA as a template; sufficiently mixing a DNA solution with the concentration of 1-2mg / mL and a lead nitrate solution with the concentration of 50mM; then carrying out water bath heating to achieve 35-45 DEG C, simultaneously adding a thioacetamide solution with the concentration of 0.4 M, and stirring at low speed; heating to 70 DEG C, and keeping for 5-10 minutes; cooling, then washing and centrifuging to extract sediments, and carrying out drying treatment so as to obtain a lead sulfide nano-structure taking the DNA as the template. The invention directly takes the large biological molecule DNA as the template; the bionic mineralization method has the advantages of easy operation, moderate preparation condition, uniform appearance, can regulate and control the mineral crystal nucleation process through biological molecules, controls the appearance and the structure of a PbS crystal and has unique superiority in the growth research of the PbS crystal.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a process for preparing short rod-shaped and peony flower-shaped lead sulfide nanostructures by using DNA biomacromolecule as a template. Background technique [0002] Lead sulfide is a cubic rock-salt semiconductor material with a narrow band gap (0.41eV) and a large Bohr excitonic radius (18nm). Lead sulfide nanocrystals have a strong quantum confinement effect, and their tertiary nonlinear optical properties are about 30 times that of GaAs and 1000 times that of CdSe. Photovoltaic conversion has potential application value, and its attractive application prospect has aroused widespread concern of chemists and material scientists, and has become a hot spot in nanomaterials research. [0003] At present, there are many methods for the preparation of lead sulfide. It can be roughly divided into two categories from the raw materials: one is to use lead sa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G21/21B82B3/00
Inventor 于源华崔薇何乃彦王姝刘振宁徐任
Owner CHANGCHUN UNIV OF SCI & TECH
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