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Preparation method of water-soluble silver halide nanoparticle

A nanoparticle and silver halide technology, applied in the field of nanomaterials, can solve problems such as difficult to obtain water-soluble silver halide nanoparticles, and achieve the effect of simple operation and easy-to-obtain raw materials

Active Publication Date: 2010-07-14
ZHEJIANG TANGUSHANGXI MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since silver halide is very easy to precipitate in water, the particle size of silver halide particles prepared by ordinary co-precipitation method in the water phase is generally in the submicron (between one hundred nanometers and one micron) or even micron level, and it is difficult to obtain water solubility. silver halide nanoparticles

Method used

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  • Preparation method of water-soluble silver halide nanoparticle
  • Preparation method of water-soluble silver halide nanoparticle
  • Preparation method of water-soluble silver halide nanoparticle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Step 1): Add 1g of hyperbranched polyglycidol with a molecular weight of 20000 to a flask containing 100mL of deionized water, and after stirring for 30min, add 0.2g of silver nitrate and continue stirring for 1hr to obtain a hyperbranched polyglycidol containing silver ions. Aqueous glycidol solution.

[0017] Step 2): Add 0.07 g of sodium chloride to the silver ion-containing hyperbranched polyglycidol aqueous solution obtained in step 1), and stir for 1 hr to obtain water-soluble silver chloride nanoparticles. The transmission electron microscope picture is attached figure 1 As shown, the particle size is 2-8 nanometers, and the particle dispersibility is good. The energy spectrum analysis diagram is attached figure 2 As shown, the presence of silver and chlorine is confirmed.

Embodiment 2

[0019] Step 1): Add 10 g of hyperbranched polyglycidol with a molecular weight of 80,000 to a flask containing 300 mL of deionized water. After stirring for 1 hour, add 0.5 g of silver nitrate and continue stirring for 2 hours to obtain a hyperbranched polyglycidol containing silver ions. Aqueous glycidol solution.

[0020] Step 2): Add 0.36 g of potassium bromide to the silver ion-containing hyperbranched polyglycidol aqueous solution obtained in step 1), and stir for 1 hr to obtain water-soluble silver bromide nanoparticles. The transmission electron microscope picture is attached image 3 As shown, the particle size is 2-6 nanometers, and the particle dispersibility is good. The energy spectrum analysis diagram is attached Figure 4 As shown, the presence of silver and bromine is confirmed.

Embodiment 3

[0022] Step 1): Add 2g of hyperbranched polyglycidol with a molecular weight of 10,000 to a flask containing 100mL of deionized water, and after stirring for 30 minutes, add 0.01g of silver sulfate and continue stirring for 2hr to obtain a hyperbranched polyglycidol containing silver ions. Aqueous glycidol solution.

[0023] Step 2): Add 0.0047 g of potassium chloride to the silver ion-containing hyperbranched polyglycidol aqueous solution obtained in step 1), and stir for 15 minutes to obtain water-soluble silver chloride nanoparticles.

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Abstract

The invention discloses a preparation method of a water-soluble silver halide nanoparticle, which comprises the following steps: adding 0.1-50g of hyperbranched polyglycidol with the molecular weight being 10000-500000 into 50-1000mL of deionized water, stirring for 1 minute to 1 hour, adding 0.01-5g of silver salt, continuously stirring for 1 minute to 2 hours, adding halogen-containing acid or salt with the molar ratio of the halogen-containing acid or salt and the silver salt being 0.43-1.05, and stirring 1 minute to 1 hour, thereby obtaining the water-soluble silver halide nanoparticle. The particle size of the water-soluble silver halide nanoparticle is 2-20nm, the size distribution is very uniform, and the water solubility is good. The operation of the invention is simple, the raw materials can be easily obtained, and the invention is applicable to large-scale preparation. The particle size of the water-soluble silver halide particle prepared in the invention is observed by a transmission electron microscope, the element composition of the water-soluble silver halide particle is tested by an energy spectrum analyzer, and the crystal structure of the water-soluble silver halide particle is represented by an X-ray diffraction instrument. The results show that the particle size of the prepared water-soluble silver halide nanoparticle is 2-20nm, and the crystallization is good.

Description

Technical field [0001] The invention relates to the field of nanomaterials, in particular to a method for preparing water-soluble silver halide nanoparticles Background technique [0002] Water-soluble silver halide nanoparticles have important applications in coatings, pigments, photosensitive materials, image processing agents, and catalysis. Since silver halide is very easy to precipitate in water, the particle size of silver halide particles prepared by ordinary co-precipitation in the water phase is generally sub-micron (between one hundred nanometers and one micron) or even micron, which makes it difficult to obtain water solubility. Silver halide nanoparticles. Summary of the invention [0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a method for preparing water-soluble silver halide nanoparticles. [0004] The preparation method of water-soluble silver halide nanoparticles includes the following steps: [0005] 1) Ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G5/02B82B3/00
Inventor 周立高超
Owner ZHEJIANG TANGUSHANGXI MATERIAL SCI & TECH
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