Inorganic semiconductor super nanoparticle and its preparation method

An inorganic semiconductor and nanoparticle technology, applied in nanotechnology, lead sulfide, cadmium sulfide, etc., can solve the problems of cumbersome process and environmental pollution, and achieve the effect of simplifying the preparation process

Inactive Publication Date: 2012-09-26
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The limitations of this method are: first, the process is cumbersome and requires two steps of synthesis and assembly; second, during the assembly process, a large amount of organic solvent needs to be used, which is easy to cause environmental pollution

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  • Inorganic semiconductor super nanoparticle and its preparation method
  • Inorganic semiconductor super nanoparticle and its preparation method
  • Inorganic semiconductor super nanoparticle and its preparation method

Examples

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Comparison scheme
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Embodiment 1

[0033] Embodiment 1: Preparation of cadmium selenide super nanoparticles

[0034] This example is used to illustrate the inorganic semiconductor super nanoparticles provided by the present invention and its preparation method.

[0035] 1) Dissolve 0.5 mmol of cadmium perchlorate and 2 mmol of thioglycolic acid in 150 ml of water, and adjust the pH value to 9.0 with 1 mol / liter of NaOH aqueous solution;

[0036] 2) Then add 0.2 millimoles of sodium selenide under an inert atmosphere, and raise the temperature to 85° C. at a heating rate of 0.3° C. / min, thereby preparing spherical cadmium selenide super nanoparticles with a particle size of about 49 nanometers.

[0037] figure 1 It is the transmission electron microscope figure of described cadmium selenide super nanoparticle, by figure 1 It can be seen that the particle size of this super nanoparticle is about 49 nanometers, and the monodispersity is good, and the large ball is formed by gathering nanocrystals of about 5 nano...

Embodiment 2

[0038] Embodiment 2: Preparation of cadmium sulfide super nanoparticles

[0039] This example is used to illustrate the inorganic semiconductor super nanoparticles provided by the present invention and its preparation method.

[0040] 1) Dissolve 0.3 mmol of cadmium perchlorate and 0.8 mmol of mercaptopropionic acid in 100 ml of water, and adjust the pH value to 8.5 with 1 mol / liter of NaOH aqueous solution.

[0041] 2) Then add 0.1 mmol of sodium sulfide under an inert atmosphere, and raise the temperature to 70° C. at a heating rate of 0.5° C. / min, thereby preparing spherical cadmium selenide super nanoparticles with a particle size of about 35 nanometers.

[0042] Figure 5It is the transmission electron microscope figure of described cadmium sulfide super nanoparticle; Figure 6 is the electronic energy spectrum of the cadmium sulfide super nanoparticle; Figure 7 is the laser light scattering spectrogram of the cadmium sulfide super nanoparticle. combine Figure 5-7 ...

Embodiment 3

[0043] Embodiment 3: Preparation of zinc selenide super nanoparticles

[0044] This example is used to illustrate the inorganic semiconductor super nanoparticles provided by the present invention and its preparation method.

[0045] 1) Dissolve 0.3 mmol of zinc nitrate and 0.7 mmol of cysteine ​​in 80 ml of water, and adjust the pH value to 9.2 with 1 mol / liter of NaOH aqueous solution.

[0046] 2) Then add 0.1 mmol of sodium selenide under an inert atmosphere, and heat up to 100° C. at a heating rate of 1.5° C. / min to prepare spherical cadmium selenide super nanoparticles with a particle size of about 60 nanometers.

[0047] Figure 8 It is the transmission electron micrograph of the zinc selenide super nanoparticle; Figure 9 is the electron energy spectrum of the zinc selenide super nanoparticle; Figure 10 It is the laser light scattering spectrum of zinc selenide supernanoparticles. combine Figure 8-10 It can be confirmed that the product prepared in Example 3 is zi...

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Abstract

The invention provides an inorganic semiconductor super nanoparticle and its preparation method. The preparation method of the inorganic semiconductor super nanoparticle comprises: adjusting the pH value of an aqueous solution containing a positive ion complexing agent and a negative charge stabilizer to 8-10, and adding a negative ion complexing agent into the aqueous solution, and then conducting raising the temperature to 40-100DEG C at rate of 0.1-2DEG C / M, with the positive ions in the positive ion complexing agent and the negative ions in the negative ion complexing agent being able to generate a precipitate. According to the preparation method of the inorganic semiconductor super nanoparticle of the invention, the inorganic semiconductor super nanoparticle can be directly generated without implementing an assembling process, thereby simplifying the preparation process of the inorganic semiconductor super nanoparticle. Moreover, the entire preparation process needs no organic solvent, thus causing no environmental pollution.

Description

technical field [0001] The invention relates to a preparation method of inorganic semiconductor super nanometer particles and inorganic semiconductor super nanometer particles prepared by the method. Background technique [0002] Nanomaterials refer to materials that have at least one dimension between 1-100 nanometers, and have properties that are significantly different from their bulk phase and molecules (atoms), such as small size effects, quantum confinement effects, etc. Nanomaterials are expected to bring a revolution in the field of materials. While promoting the development of basic disciplines, nanomaterials have made great progress in the fields of optics, electricity, and magnetism. Inorganic semiconductor nanocrystals have attracted much attention due to their size-tunable optoelectronic properties. At present, there are mature methods for synthesizing monodisperse semiconductor nanocrystals (for example, refer to J.Am.Chem.Soc.1993, 115, 8706-8715), however, d...

Claims

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Application Information

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IPC IPC(8): C01B19/04C01G11/02C01G21/21B82Y40/00
Inventor 唐智勇夏云生
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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