Method for extracting nano-silver in aqueous phase by using ionic liquid

An ionic liquid and water extraction technology, applied in the field of nano-silver, can solve the problems that nano-silver particles are not very mature, the characteristics and laws of nano-silver particles are quite different, and achieve the effects of good application value, mild conditions and simple process.

Inactive Publication Date: 2010-12-08
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the preparation of nano-silver particles in the aqueous phase, the research on the preparation of nano-silver particles in non-aqueous solvents is not very mature, and the characteristics and rules of preparing nano-silver particles in different solvents are quite different. Therefore, the first This approach has great limitations in application

Method used

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  • Method for extracting nano-silver in aqueous phase by using ionic liquid
  • Method for extracting nano-silver in aqueous phase by using ionic liquid

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Take 2g of dry powder of camphor leaves, add 100mL of deionized water, place in a water-bath shaker, temperature 30°C, rotation speed 180r / min, shake for 5h, take out and cool to room temperature, and vacuum filter to obtain 20g / L of camphor leaf extract .

[0019] Take more than 20mL of cinnamon camphor leaf extract, add 200μL 0.1MAgNO to it 3 Solution, 400 μL 0.1M NaOH solution, magnetically stirred at room temperature, reacted for 6 hours, the reaction was complete, and a silver sol with a concentration of 1 mM was obtained.

[0020] Take 3 mL of the above-prepared silver sol in a test tube, add 0.5 mL of 30 mM phase transfer reagent cetyltrimethylammonium bromide (CTAB) to it, and then add 0.3 mL of ionic liquid 1-butyl 3-methyl imidazolium hexafluorophosphate ([Bmim][PF 6 ]), vigorously shaken for 10s, the nano-silver in the aqueous phase can be partially extracted into the ionic liquid phase. The UV-Vis spectral scanning pictures of the aqueous phase supernatan...

Embodiment 2

[0022] Get the nano-silver sol that makes in 3mL embodiment 1 in test tube, add the phase-transfer reagent hexadecyltrimethylammonium bromide (CTAB) of 0.5mL30mM wherein, then add 0.6mL ionic liquid 1-butylene therein 3-methylimidazolium hexafluorophosphate ([Bmim][PF 6 ]), vigorously shaken for 10s, all the nano-silver in the water phase can be extracted into the ionic liquid phase. The UV-Vis spectral scanning pictures of the aqueous phase supernatant before and after extraction are shown in figure 1 or figure 2 .

Embodiment 3

[0024] Get the nano-silver sol that makes in 3mL embodiment 1 in test tube, add the phase-transfer reagent hexadecyltrimethylammonium bromide (CTAB) of 0.5mL30mM wherein, add 1.0mL ionic liquid 1-butylene to it again 3-methylimidazolium hexafluorophosphate ([Bmim][PF 6 ]), vigorously shaken for 10s, all the nano-silver in the water phase can be extracted into the ionic liquid phase. The UV-Vis spectral scanning pictures of the aqueous phase supernatant before and after extraction are shown in figure 1 .

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Abstract

The invention discloses a method for extracting nano-silver in an aqueous phase by using ionic liquid, which relates to a nano-silver. The method for extracting the nano-silver in the aqueous phase by using the ionic liquid comprises the following steps of: adding plant leaf dry powder into water; shaking the mixture in a shaking table; cooling the mixture to the room temperature, and then performing vacuum filtration to obtain plant leaf leachate; mixing the plant leaf leachate with alkaline solution and silver salt precursor solution to obtain a nano-silver sol after reaction; and adding a phase transfer agent into the nano-silver sol, and adding water-insoluble ionic liquid into the mixture to ensure that nano-silver particles can be extracted into an ionic liquid phase after shaking. The method is quick, simple and convenient, has a mild condition, can obtain the nano-silver particles in the ionic liquid, and has a good application prospect.

Description

technical field [0001] The invention relates to a nano-silver, in particular to a method for extracting the nano-silver in an aqueous phase by using an ionic liquid. Background technique [0002] With its unique optical and electrical properties, small size effect, surface effect, and quantum effect, nano-silver particles have been widely used in the fields of catalysis, antibacterial, and electronic circuits. At the same time, it also has considerable application prospects in the fields of surface-enhanced Raman scattering (SERS), new hydrogen storage materials, composite electrodes, and low-temperature heat-conducting materials. The bioreduction method is a method developed in recent years for the preparation of nano-silver particles. This method has many advantages, such as a wide range of raw material biomass sources, environmentally friendly and renewable, mild reduction process conditions, and no need to add other chemical reducing agents. , The obtained nanoparticles...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 李清彪林玲王惠璇杜明明杨欣王慧林文爽林丽芹黄加乐孙道华
Owner XIAMEN UNIV
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