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Method for regulating distribution of metal nano granules in resin carrier

A metal nanoparticle, resin carrier technology, applied in chemical instruments and methods, metal material coating process, ion exchange of chelate compounds, etc., can solve problems such as the influence of the performance of the method for regulating the distribution of inorganic metal particles is not explained.

Active Publication Date: 2011-06-22
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

None of these results address the method of regulating the distribution of inorganic metal particles and its impact on performance.

Method used

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  • Method for regulating distribution of metal nano granules in resin carrier
  • Method for regulating distribution of metal nano granules in resin carrier
  • Method for regulating distribution of metal nano granules in resin carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 5g of D-201 resin to 2mol / L of FeCl 4 - In the solution, the solid-to-liquid ratio is 10g / L. Shake to make FeCl 4 - And resin ion exchange reaction 4h, filter. The concentration (weight percentage) is 0.9% NaBH 4 or KBH4 The solution was mixed with it, reacted under ultrasonic vibration for 15 minutes, and then washed with anaerobic water. Vacuum dry at 40°C for 24h. The prepared nano-zero-valent iron is distributed on the periphery of the resin carrier, and its thickness accounts for about 25% of the radius of the carrier section. A scanning electron micrograph of this material is shown in figure 1 shown.

[0032] This composite material reduces 50mg / LNO at the initial pH of the solution=2 3 - The conversion rate of -N is 40%, and the loss rate of Fe is 90%; when pH=6, the product NH 4 + The generation rate is 0.010min -1 .

Embodiment 2

[0034] Add 5g of D-201 resin to 2mol / L of FeCl 4 - In the solution, the solid-to-liquid ratio is 10g / L. Shake to make FeCl 4 - And resin ion exchange reaction 4h, filter. NaBH with a concentration of 1.8% 4 or KBH 4 The solution was mixed with it, reacted under ultrasonic vibration for 15 minutes, and then washed with anaerobic water. Vacuum dry at 40°C for 24h. The prepared nano-zero-valent iron is distributed on the periphery of the resin carrier, and its thickness accounts for about 50% of the radius of the carrier section. A scanning electron micrograph of this material is shown in figure 2 shown.

[0035] This composite material reduces 50mg / LNO at the initial pH of the solution=2 3 - The conversion rate of -N is 44%, and the loss rate of Fe is 76%; when pH=6, the product NH 4 + The generation rate is 0.018min -1 .

Embodiment 3

[0037] Add 5g of D-201 resin to 2mol / L of FeCl 4 - In the solution, the solid-to-liquid ratio is 10g / L. Shake to make FeCl 4 - And resin ion exchange reaction 4h, filter. NaBH with a concentration of 3.6% 4 or KBH 4 The solution was mixed with it, reacted under ultrasonic vibration for 15 minutes, and then washed with anaerobic water. Vacuum dry at 40°C for 24h. The prepared nano-zero-valent iron is distributed on the periphery of the resin carrier, and its thickness accounts for about 80% of the radius of the carrier section. A scanning electron micrograph of this material is shown in image 3 shown.

[0038] This composite material reduces 50mg / LNO at the initial pH of the solution=2 3 - The conversion rate of -N is 45%, and the loss rate of Fe is 73%; when pH=6, the product NH 4 + The generation rate is 0.021min -1 .

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Abstract

The invention discloses a method for regulating distribution of metal nano granules in a resin carrier. Ion exchange resin or adsorption resin with alkali functional groups is used as a carrier in the method, and the method comprises the following steps of: guiding metal to the resin carrier in a complex anion form by ion exchange effect, and regulating the distribution states of the metal and the compounds thereof on the resin carrier by changing the conditions of concentration of a deposition agent or a reducing agent in aqueous solution, reaction time and the like. The regulated metal nano granules can present annular distribution of different thicknesses and densities on the resin carrier. The different metal distribution has important influence on the properties of inorganic-organic composite materials such as reaction activity, reaction selectivity, metal stability and the like. The method has important reference significance for design and structure regulation of homogeneous inorganic-organic composite materials.

Description

technical field [0001] The invention relates to a method for regulating the distribution of metal nanoparticles in a resin carrier, more specifically a method for regulating the distribution of metal nanoparticles in a resin carrier by changing the diffusion properties of a reducing agent or a precipitant. Background technique [0002] Metal-organic-inorganic composite materials have been widely used in environmental protection, chemical catalysis and other fields. At present, relevant research mainly focuses on the preparation method, structural characterization and working performance of this new type of composite material, but there are few reports on the relationship between structure regulation and performance. Some foreign scholars are studying anion exchange resin and γ-Al 2 o 3 It was found that the lower partial pressure H 2 The reduced metal catalysts are mainly distributed on the periphery of the support, while NaBH 4 The reduced metal is evenly distributed th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/31B01J41/12B01J37/02B01J37/16
CPCB01J31/06C23C18/1216C23C18/1666B01J37/30B01J35/004B01J39/18B01J31/08C23C18/1233C23C18/1658C23C18/1644C23C18/1287B01J37/16B01J45/00B01J41/14B01J47/016B01J35/39
Inventor 潘丙才蒋珍茂张炜铭吕路谢英梅张全兴
Owner NANJING UNIV
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