One-step process of preparing monodispersive nanometer bismuth sulfide particle

A nanoparticle, monodisperse technology, applied in the field of nanomaterials, to achieve the effect of improving stability, wide application and easy control

Inactive Publication Date: 2007-06-06
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the deficiencies of the existing methods for preparing bismuth sulfide nanoparticles, the present invention proposes a method for preparing monodisperse bismuth sulfide nanoparticles that is cheap and suitable for industrial production

Method used

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  • One-step process of preparing monodispersive nanometer bismuth sulfide particle
  • One-step process of preparing monodispersive nanometer bismuth sulfide particle

Examples

Experimental program
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Embodiment 1

[0018] Embodiment 1: earlier the bismuth nitrate of 13.825g is dissolved in the deionized water of 50ml, makes the bismuth nitrate aqueous solution, and concentration is 0.7mol / l, gets 10ml at every turn; Then dispersion stabilizer chitosan is added to 10ml bismuth nitrate In the aqueous solution, the mass ratio of bismuth nitrate and chitosan is 5:1 to make a precursor mixed solution. Pour the precursor mixed solution into a 250ml three-neck flask, place in a constant temperature water bath at 45°C, and stir rapidly for 40mins. Raise the temperature to 75°C, dissolve sodium sulfide in 50ml of deionized water so that the concentration of the sodium sulfide solution is 0.05mol / l, inject the sodium sulfide aqueous solution with a syringe, adjust the pH value to 9.0, and react at a constant temperature for 1 hour, that is Bismuth sulfide nanoparticles with a particle size of 4nm can be obtained, see accompanying drawing 1.

Embodiment 2

[0019] Embodiment 2: the bismuth ammonium nitrate of 10.725g is dissolved in the deionized water of 50ml, is configured into the solution that concentration is 0.5mol / l, gets 20ml; Then 1.43g dispersion stabilizer PEG and PVP mixture (the mole of PEG and PVP The ratio is 2:1) into the prepared 20ml bismuth ammonium citrate nitrate solution, the mass ratio of bismuth ammonium nitrate and dispersion stabilizer is 3:1. Pour the precursor mixture into a 250ml three-neck flask, stir rapidly for 50mins in a 55° constant temperature water bath, then inject 50ml of thioacetamide, control the concentration of thioacetamide to 0.03mol / l, and adjust the pH to 6.0 Raise the temperature to 130□ and stir rapidly for 1.5 hours to obtain bismuth sulfide nanoparticles with narrow particle size distribution and uniform dispersion.

Embodiment 3

[0020] Embodiment 3: first dissolve the bismuth acetate of 13.510g in the aqueous solution of ethanol, wherein the volume ratio of ethanol and water is 75:25 and is configured into the solution 50ml that concentration is 0.7mol / l, gets 10ml. Then 300 mg of dispersion stabilizer dextran was added to the bismuth acetate solution, and the mass ratio of bismuth acetate to dextran was 9:1 to prepare a precursor mixed solution. Pour the precursor mixed solution into a 250ml three-necked flask, place it in a constant temperature water bath at 65°C, stir rapidly for 40mins, raise the temperature to 85°C, inject 50ml of sodium sulfide aqueous solution with a syringe, the concentration of sodium sulfide is 0.01mol / l, adjust The pH value is 7.0, and the constant temperature is reacted for 1 hour to obtain bismuth sulfide nanoparticles, as shown in Figure 2.

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Abstract

The present invention relates to process of preparing monodispersive nanometer bismuth sulfide particle. The process includes the following steps: 1. preparing bismuth containing precursor solution; 2. preparing sulfur containing precursor solution; 3 adding the bismuth containing precursor solution into the sulfur containing precursor solution quickly based on the volume ratio between the bismuth containing precursor solution and the sulfur containing precursor solution of 1 to 5-2 to 5 at constant temperature of 45-130 deg.c and through high speed stirring, and reacting for 1-4 hr while controlling the pH value of the reaction system in 5.0-10.0 to control the growth of crystal nucleus, so as to obtain nanometer product particle with homogeneous particle size distribution. The present invention has the advantages of environment friendly dispersing medium deionized water or alcohol, short reaction period, high yield, the biocompatibility of the dispersing stabilizer, etc.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, in particular to a method for preparing monodisperse bismuth sulfide nanoparticles. Background technique [0002] Due to its special structure, shape, and particle size distribution, monodisperse nanoparticles have extremely broad application prospects in nonlinear optics, catalysis, magnetic media, medicine, and functional materials. Basic research in development and related fields has a profound impact. For nanoparticles, the size and distribution of nanoparticles are very important. They directly affect their surface effects, quantum effects, small size effects and macroscopic quantum tunneling effects, etc., which lead to their applications in optics, magnetism, electricity, Thermal and mechanical properties. It can be seen that the particle size scale of nanoparticles is crucial to the performance of materials, and the preparation of monodisperse nanop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G29/00B82B3/00
Inventor 高建平杨洁司有苗
Owner TIANJIN UNIV
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