Metal organic framework and metal nano ion composite filter membrane and preparation method and application thereof

A metal-organic framework and metal nanoparticle technology, which is applied in chemical instruments and methods, preparation of test samples, membrane technology, etc., can solve problems such as weak Raman spectral effects and limited development, and achieve shortened adsorption time and reduced detection The effect of limitation and convenient method

Inactive Publication Date: 2017-05-31
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the Raman spectral effect is very weak, only 10 of the incident light intensity -6 ~10 -9 , greatly restricting its development

Method used

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  • Metal organic framework and metal nano ion composite filter membrane and preparation method and application thereof
  • Metal organic framework and metal nano ion composite filter membrane and preparation method and application thereof
  • Metal organic framework and metal nano ion composite filter membrane and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Preparation of MIL-101 / Silver Nanoparticle Composite Filtration Membrane

[0041] (1) Preparation of silver nanoparticles

[0042] 20ml concentration is 10 -2 M silver nitrate aqueous solution, 20ml mass fraction of 1% sodium citrate aqueous solution was dissolved in 80ml deionized water and mixed evenly; under vigorous stirring, add 100ml freshly prepared 10 -2 M sodium borohydride aqueous solution; the resulting mixed solution was further stirred at room temperature for one hour to obtain a yellow-green silver sol solution. image 3 It is a transmission electron microscope image (TEM) of silver nanoparticles. It can be seen from the figure that the size of silver nanoparticles is uniform, and the particle size distribution is between 25 and 35 nanometers; Figure 4 It is the ultraviolet absorption spectrum diagram of the silver nanoparticles. There is a maximum absorption peak at 385 nanometers, and the peak width is very narrow, which also proves that the size of t...

Embodiment 2

[0050] Preparation of MIL-101 / Silver Cubic Nanoparticle Composite Filtration Membrane

[0051] (1) Preparation of silver cubic nanoparticles

[0052] Put 90mg of silver nitrate, 110mg of polyvinylpyrrolidone, 20ml of ethylene glycol and 1mg of sodium chloride in a 50ml polytetrafluoroethylene reaction vessel, stir well to dissolve. Then place the mixed solution in a microwave oven at 320 watts for a heating reaction for 2 minutes to obtain silver cubic nanoparticles with a diameter of 55 nanometers

[0053] (2) Preparation of self-assembled films of silver cubic nanoparticles

[0054] Thoroughly mix 2ml of 3-mercaptopropyl-trimethoxysilane with 25ml of isopropanol to make a 3-mercaptopropyl-trimethoxysilane solution, and then place a glass fiber filter membrane with a thickness of 37mm on the 3-mercaptopropyl Modified in a base-trimethoxysilane solution for one day, rinsed with isopropanol, annealed at 110°C for 10 minutes, and stored in an inert atmosphere. Soak the modifi...

Embodiment 3

[0060] Preparation of MIL-101 / Gold Nanorod Composite Filtration Membrane

[0061] (1) Preparation of gold nanorod particles

[0062] a) Preparation of spherical gold seeds: the concentration of 10ml was 5x10 -4 M's chloroauric acid aqueous solution and 10ml concentration of 0.2M cetyltrimethylammonium bromide are uniformly mixed to prepare a mixed solution, and 1.2ml concentration of 0.01M freshly prepared ice sodium borohydride aqueous solution is added to the mixed solution , stir well for 2 minutes, wait for the solution to turn brown, and let it stand at room temperature for at least 10 minutes. The resulting spherical gold seeds are about 3 nm in diameter.

[0063] b) Preparation of gold nanorods: 2.5ml concentration of 0.01M chloroauric acid aqueous solution, 0.3ml concentration of 0.01M silver nitrate solution, 47.5ml concentration of 0.1M hexadecyltrimethylammonium bromide and 0.275 The concentration in ml was 0.1M ascorbic acid aqueous solution and stirred evenly t...

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Abstract

The invention discloses a metal organic framework and metal nano ion composite filter membrane and a preparation method and application thereof. The metal organic framework and metal nano ion composite filter membrane is firstly prepared, then the metal organic framework and metal nano ion composite filter membrane is loaded in a bacterium filter, an organic pollutant solution is added in a needle tube, the organic pollutant adsorption of the metal organic framework and metal nano ion composite filter membrane is achieved through an injection filtration method, and finally, surface-enhanced Raman detecting is directly conducted. The materials required by the preparation method are simple, at the same time, the prepared composite filter membrane is stable in property, and the composite filter membrane can be recycled and is low in cost. The prepared metal organic framework and metal nano ion composite filter membrane can rapidly enrich organic pollutant molecules and achieve the rapid detection of the organic pollutants through the combination with the surface enhanced Raman spectroscopy.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a metal-organic framework / metal nano-ion composite filter membrane and a preparation method and application thereof. Background technique [0002] With the unreasonable production and abuse of a large number of chemicals, the problems of environmental monitoring and governance have become increasingly serious. Domestic sewage and industrial wastewater are discharged into the environment without treatment, crude oil leaks, and nuclear radiation leaks are all important sources of water environmental pollution. There are many types of water pollutants, and organic pollutants are one of them. Organic dye Rhodamine B, food additive Sudan I, and melamine are the main organic pollutants in the water environment. They have carcinogenic, teratogenic, and mutagenic toxic effects, are difficult to degrade, cause harm to aquatic organisms, and cause red tides and oth...

Claims

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Application Information

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IPC IPC(8): B01D69/12B01D71/02B01D71/06B01D67/00G01N1/34
CPCB01D67/0079B01D69/12B01D71/02B01D71/06G01N1/34
Inventor 鲍静静程昱川刘雅娇张磊孙爱华李志祥许高杰
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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