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Cellulose environment-friendly synthesis method of nano silver particles

A technology for nano-silver particles and green synthesis is applied in the field of metal nano-material preparation to achieve the effects of high yield, controllable morphology and size, and convenient operation.

Inactive Publication Date: 2013-10-09
PUTIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the help of a hydrothermal reaction system, the hydrolysis of lignocellulose and the reduction process of nano-silver particles are combined, and the hydrolyzed product glucose of cellulose is used for reduction to prepare nano-silver particles with controllable morphology and size. There is no relevant report yet.

Method used

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  • Cellulose environment-friendly synthesis method of nano silver particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0019] Weigh 0.04g Ag respectively 2 SO 4 Put 0.50g of filter paper (cellulose) into a 50mL polytetrafluoroethylene liner, add 30ml of deionized water to it, and stir well to make it evenly mixed. Then put the lining into the autoclave and put it in an oven, heat it at 200°C for 20h, and then let it cool to room temperature; centrifuge the reacted product, observe the reaction product with a transmission electron microscope (TEM), and obtain nano silver The particles are spherical particles with a single particle size of 70~90nm.

Embodiment 3

[0021] Weigh 0.04g Ag respectively 2 SO 4 Put 0.40g of filter paper (cellulose) into a 50mL polytetrafluoroethylene liner, add 30ml of deionized water to it, and stir well to make it evenly mixed. Then put the lining into the autoclave and put it in an oven, heat it at 190°C for 20h, and then let it cool to room temperature; centrifuge the reacted product, observe the reaction product with a transmission electron microscope (TEM), and obtain nano silver The particles are spherical particles with a single particle size of 60~90nm.

Embodiment 4

[0023] Weigh 0.03g Ag respectively 2 SO 4 Put 0.40g of filter paper (cellulose) into a 50mL polytetrafluoroethylene liner, add 30ml of deionized water to it, and stir well to make it evenly mixed. Then put the lining into the autoclave and put it in an oven, heat it at 200°C for 20h, and then let it cool to room temperature; centrifuge the reacted product, observe the reaction product with a transmission electron microscope (TEM), and obtain nano silver The particles are spherical particles with a single particle size of 70~90nm.

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Abstract

The invention discloses a cellulose environment-friendly synthesis method of nano silver particles. The cellulose environment-friendly synthesis method comprises the following steps of: placing cellulose and silver sulfate in a polytetrafluoroethylene lining, adding deionized water, fully stirring to ensure that the cellulose, the silver sulfate and the deionized water are uniformly mixed; and loading the lining in a high-pressure autoclave and placing in an oven, heating for 10-24h at a temperature of 180-210 DEG C, taking out and then naturally cooling; centrifuging or suction-filtering and separating a cooled product to obtain the nano silver particles. According to the cellulose environmental-friendly synthesis method, other chemical agents are not needed to be introduced, renewable biomass resources can be utilized, and the convenience is brought for the operation; the synthesized nano silver particles are controllable in morphology and size, uniform in dispersion, and high in yield; and the synthesized nano silver particles are not agglomerated.

Description

technical field [0001] The invention belongs to the technical field of metal nanomaterial preparation, and in particular relates to a cellulose green synthesis method of nano silver particles. Background technique [0002] Nano-silver particles are widely used in the fields of microelectronics industry, catalysis, photocatalysis, medicine, optics and optical materials because of their unique properties different from traditional silver powder. At present, the preparation methods of nano-silver particles mainly include physical vapor phase evaporation condensation method, sputtering method, laser high temperature combustion method, mechanical grinding method, electrochemical method, liquid phase chemical reduction method and light induction method. Among them, the liquid-phase chemical reduction method has become the main method for preparing nano-silver powder at low cost because of its simple equipment, convenient operation, and controllable shape and size. Nano silver par...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 李先学
Owner PUTIAN UNIV
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