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Silver nano particle preparation method using visible light to reduce silver ions

A technology of silver nanoparticles and silver ions, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of cumbersome preparation process and high cost, and achieve simple preparation process, low cost and high application promising effect

Active Publication Date: 2014-01-01
安徽独秀包装科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the pH value of the solution needs to be adjusted during the preparation of nano-silver, and protective agents, reducing agents, etc. need to be added, the preparation process is cumbersome and the cost is high.

Method used

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  • Silver nano particle preparation method using visible light to reduce silver ions

Examples

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Effect test

Embodiment 1

[0012] Add 1 gram of silver nitrate and 500 milliliters of 5 mg / L methylene blue solution in a beaker, place it under a 40W fluorescent lamp and stir for 50 hours, then centrifuge and dry to prepare 0.12 grams of silver nanoparticles. Determination results: The composition of the particles was analyzed by an INCA X-ray energy spectrometer, and the morphology of the nano-silver particles was observed by the JSM-6700F scanning electron microscope of Japan Electronics Corporation. The results showed that: by figure 1 It can be seen that the prepared particles are elemental silver nanoparticles, and the particle size is between 5-100nm.

Embodiment 2

[0014] Add 1 gram of silver nitrate and 20 milliliters of 100 mg / L methylene blue solution into a beaker, place it under sunlight and stir for 80 hours, then centrifuge and dry to prepare 0.18 grams of silver nanoparticles. Measurement results: The composition of the particles was analyzed by an INCA X-ray energy spectrometer, and the morphology of the nano-silver particles was observed through the JSM-6700F scanning electron microscope of Japan Electronics Corporation. The results showed that the prepared particles were elemental silver nanoparticles, and the particle size was between Between 15-150nm.

Embodiment 3

[0016] Add 1 gram of silver nitrate and 200 ml of 80 mg / L methylene blue solution in a beaker, place it under a 100W incandescent lamp and stir for 20 hours, then centrifuge and dry to prepare 0.10 g of nano silver particles . Measurement results: The composition of the particles was analyzed by an INCA X-ray energy spectrometer, and the morphology of the nano-silver particles was observed through the JSM-6700F scanning electron microscope of Japan Electronics Corporation. The results showed that the prepared particles were elemental silver nanoparticles, and the particle size was between Between 5-90nm.

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Abstract

The invention discloses a silver nano particle preparation method using visible light to reduce silver ions. The method includes: adding soluble silver salt into 5-10mg / L methylene blue solution, stirring for 20-80 hours under irradiation of sunlight or artificial visible light to reduce silver ions into nano silver, centrifugally separating, and drying to obtain silver nano particles. The method is simple in process, low in cost, and the like, the prepared silver nano particles are applicable to fields such as industrial catalysis and antibacterial materials.

Description

(1) Technical field: [0001] The invention relates to a method for preparing nanoparticles by reducing metal ions with visible light, and mainly relates to a method for preparing silver nanoparticles by reducing silver ions with visible light. (two) background technology: [0002] Because of its catalytic and antibacterial properties, silver nanoparticles are often used in many fields such as antibacterial agents and industrial catalysts. In recent years, the preparation technology of nano-silver particles has been one of the hot spots in the research of materials science, chemistry and other disciplines. Chinese patent (CN101966595A) discloses a nano-silver preparation process. The process is to dissolve silver salts and protective agents in water-soluble solvents or In the alcohol solvent, adjust the pH value so that the pH value is in the required range, then add a reducing agent, heat and stir for 20-30 minutes to react, and obtain a golden yellow nano-silver solution. S...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y30/00
Inventor 徐志兵李法松宋磊
Owner 安徽独秀包装科技有限公司
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