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Preparation of nano sized hollow and solid square silver sulfate granules

A nanoparticle, silver sulfide technology, applied in chemical instruments and methods, silver compounds, silver compounds, etc., to achieve the effects of low cost, high efficiency, and low reaction temperature

Inactive Publication Date: 2004-02-04
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no report on the preparation method of hollow or solid square silver sulfide nanoparticles

Method used

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  • Preparation of nano sized hollow and solid square silver sulfate granules
  • Preparation of nano sized hollow and solid square silver sulfate granules
  • Preparation of nano sized hollow and solid square silver sulfate granules

Examples

Experimental program
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Effect test

Embodiment 1

[0018] ①In a 50mL Erlenmeyer flask with a stopper, dissolve 0.04g carboxymethyl cellulose ether in 10ml deionized water, and stir gently for 12 hours to completely dissolve the cellulose.

[0019] ②Dissolve 0.0034g silver nitrate in 5ml deionized water to get 4×10 -3 M silver nitrate solution.

[0020] ③ Take 5ml of the silver nitrate aqueous solution in ② and add it to the carboxymethyl cellulose ether prepared in ①, and stir for 4 hours under the condition of avoiding light.

[0021] ④Dissolve 0.00113g of thioacetamide in 5ml of water to obtain a concentration of 3×10 -3 mol / L aqueous solution of thioacetamide.

[0022] ⑤ Slowly drip the aqueous solution of thioacetamide prepared in ④ into the aqueous carboxymethyl cellulose ether solution of silver nitrate in ③ under stirring condition. The mixture was stirred at 20° C. in the dark for 8 hours. The obtained product is centrifuged, washed with a large amount of deionized water, and vacuum-dried to obtain nano-silver sulf...

Embodiment 2

[0024] ①In a 50mL Erlenmeyer flask with a stopper, dissolve 0.05g carboxymethyl cellulose ether in 20ml deionized water, and stir gently for 12 hours to completely dissolve the cellulose.

[0025] ②Dissolve 0.0034g silver nitrate in 5ml deionized water to get 4×10 -3 mol / L silver nitrate solution.

[0026] ③ Take 5ml of the silver nitrate aqueous solution in ② and add it to the carboxymethyl cellulose ether prepared in ①, and stir for 4 hours under the condition of avoiding light.

[0027] ④Dissolve 0.00113g of thioacetamide in 5ml of water to obtain a concentration of 3×10 -3 mol / L aqueous solution of thioacetamide.

[0028] ⑤ Slowly drip the aqueous solution of thioacetamide prepared in ④ into the aqueous carboxymethyl cellulose ether solution of silver nitrate in ③ under stirring condition. The mixture was stirred at 80° C. in the dark for 4 hours. The obtained product is centrifuged, washed with a large amount of deionized water, and vacuum-dried to obtain nano-silver ...

Embodiment 3

[0030] ①In a 50mL Erlenmeyer flask with a stopper, dissolve 0.05g of carboxymethyl cellulose ether in 10ml of deionized water, and stir gently for 12 hours to completely dissolve the cellulose.

[0031] ②Dissolve 0.0064g silver nitrate in 5ml deionized water to get 8×10 -3 mol / L silver nitrate solution.

[0032] ③ Take 5ml of the silver nitrate aqueous solution in ② and add it to the carboxymethyl cellulose ether prepared in ①, and stir for 4 hours under the condition of avoiding light.

[0033] ④Dissolve 0.00225g of thioacetamide in 5ml of water to obtain a concentration of 6×10 -3 mol / L aqueous solution of thioacetamide.

[0034] ⑤ Slowly drip the aqueous solution of thioacetamide prepared in ④ into the aqueous carboxymethyl cellulose ether solution of silver nitrate in ③ under stirring condition. The mixture was stirred at 100° C. in the dark for 8 hours. The obtained product is centrifuged, washed with a large amount of deionized water, and vacuum-dried to obtain nano-...

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Abstract

A process for preparing hollow and solid square silver sulfide nanoparticles by chemical solution method includes such steps as dissolving the carboxymethyl cellulose ether in water, adding the aqueous solutions of silver nitrate and thioacetylamine, and reacting at ordinary temp to obtain solid square silver sulfide nanoparticles or at 80-100 deg.C to obtain hollow square ones. Its advantages are low cost, and high efficiency.

Description

Technical field: [0001] The invention relates to a method for preparing hollow and solid square silver sulfide nanoparticles, in particular to a chemical solution method for preparing silver sulfide nanoparticles. The invention belongs to the technical field of semiconductor material preparation. Background technique: [0002] Nanoparticles have many unique physical and chemical properties due to their size effect, which has drawn people's attention. Silver sulfide is a good semiconductor material and has broad application prospects in the fields of optoelectronics and thermoelectricity. In recent years, there have been many reports on the preparation methods of nano-silver sulfide. Generally, nano-silver sulfide is prepared under the protection of different protective agents or dispersants in organic solvents, and the silver sulfide particles obtained by these methods are basically spherical or chain-like structures. For example, someone synthesized spherical nano-silver...

Claims

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Application Information

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IPC IPC(8): C01G5/00
Inventor 吴孟栋钱雪峰
Owner SHANGHAI JIAO TONG UNIV
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