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Method for preparing modified nanometer-palladium/iron duplex-metal particles

A nano-palladium and bimetallic technology, which is applied in the field of nanotechnology and water pollution control, can solve the problems of complicated polymerization reaction process, difficult promotion to practical application, and harsh conditions, so as to achieve simple process, improve catalytic reduction reaction activity, and reduce hardness. The effect of reunion

Inactive Publication Date: 2013-05-15
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polymerization process involved in this method is complicated, the conditions are harsh, it is not easy to operate, and it is difficult to be extended to practical applications.

Method used

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  • Method for preparing modified nanometer-palladium/iron duplex-metal particles
  • Method for preparing modified nanometer-palladium/iron duplex-metal particles
  • Method for preparing modified nanometer-palladium/iron duplex-metal particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 : Preparation of polymethyl methacrylate PMMA modified nano-palladium / iron bimetallic particles modified by adding ethanol and its removal of 2,4-dichlorophenol in water, the specific content is as follows:

[0026] (1) Preparation of nano-palladium / iron bimetallic particles

[0027] ① Preparation of nano-palladium / iron bimetallic particles modified by adding 3 mL of ethanol to PMMA

[0028] Take 10 mL of anisole solution of PMMA with a mass percent concentration of 6%, add 3 mL of absolute ethanol to 200 mL of FeSO with a concentration of 0.2 mol / L 4 The solutions were mixed and stirred for 30 min under nitrogen; 250 mL 0.4 mol / L KBH 4 Add the solution dropwise to the above mixed solution, stir while adding, delay stirring for 15 min after the dropwise addition is complete until the reaction is complete, and vacuum filter the mixed solution with a Buchner funnel equipped with a 0.22 μm water-based microporous filter membrane To dryness, wash 3 times with ...

Embodiment 2

[0039] Example 2 : Preparation of polymethyl methacrylate PMMA modified nano-palladium / iron bimetallic particles modified by adding ethanol and its removal of 2,4-dichlorophenol in water, the specific content is as follows:

[0040] (1) Preparation of nano-palladium / iron bimetallic particles

[0041] ①Preparation of nano-palladium / iron bimetallic particles modified by adding 6 mL ethanol to PMMA

[0042] Take 10 mL of anisole solution of PMMA with a mass percent concentration of 6%, add 6 mL of absolute ethanol to 200 mL of FeSO with a concentration of 0.2 mol / L 4 The solutions were mixed and stirred for 30 min under nitrogen; 250 mL of KBH with a concentration of 0.4 mol / L 4 Add the solution dropwise to the above mixed solution, stir while adding, delay stirring for 15 min after the dropwise addition is complete until the reaction is complete, and vacuum filter the mixed solution with a Buchner funnel equipped with a 0.22 μm water-based microporous filter membrane To dryn...

Embodiment 3

[0053] Embodiment 3: polymethyl methacrylate PMMA adds the preparation of the nano-palladium / iron bimetallic particle of ethanol modification and its removal to chlorinated organic matter in water, and specific content is as follows:

[0054] (1) Preparation of ethanol-modified nano-palladium / iron bimetallic particles in PMMA

[0055] Take 5 mL of anisole solution of PMMA with a mass percent concentration of 10%, add 10 mL of absolute ethanol to 100 mL of FeSO with a concentration of 0.1 mol / L 4The solutions were mixed and stirred for 25 min under nitrogen; 150 mL of NaBH with a concentration of 0.2 mol / L 4 Add the solution dropwise to the above mixed solution, and stir while adding. After the dropwise addition is completed, delay stirring for 18 min until the reaction is complete. The mixed solution is vacuum filtered with a Buchner funnel equipped with a 0.22 μm water-based microporous filter membrane. To dryness, wash 2 times with deionized water, drain to obtain PMMA-modi...

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Abstract

The invention discloses a method for preparing modified nanometer-palladium / iron duplex-metal particles. Macromolecule polymer polymethyl methacrylate is used as a modifying agent, absolute ethyl alcohol is used as cosolvent, and particle surfaces are modified in the process of nanometer-palladium / iron double duplex-metal particle preparation. The preparation method includes that anisole is adopted as solvent of the polymethyl methacrylate, the absolute ethyl alcohol is used as the cosolvent, ferrous saline solution is a precursor solution of zero-valent iron, wherein the zero-valent iron is prepared proportionally through aqueous phase the according to a certain proportion, the precursor solution forms nanometer zero-valent iron particles under the action of reducing agent hydroboration, and then an impregnation method is adopted to conduct palladiumizing to the nanometer zero-valent iron particles, and finally high polymer which is added with the nanometer-palladium / iron duplex-metal particles modified by ethanol is prepared. The nanometer-palladium / iron duplex-metal particles prepared through the method have good dispersity, inoxidizability, and dechlorinating reactivity. The method can be achieved simply in common temperature and common pressure, is simple and convenient to manufacture, and has wide application prospects.

Description

technical field [0001] The invention relates to a preparation method of modified nano-palladium / iron bimetallic particles. The method uses high polymers to add ethanol to modify the modified nano-palladium / iron bimetallic particles, and belongs to the technical field of nanotechnology and water pollution control. Background technique [0002] Since the 1990s, nano-zero-valent iron has been widely used in the removal of heavy metals, chlorinated organics, and dyes in the environment due to its large specific surface area, strong reactivity, and low cost. With the in-depth development of emerging nanotechnology and nanomaterials, the use of the specific properties of nano-iron volume effect and surface effect to improve its reductive degradation ability came into being. After Muftikian first proved that the addition of palladium can After greatly improving the degradation performance of nano-iron, the emergence of nano-iron-based bimetallic (palladium / iron, nickel / iron, copper...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 王向宇祝敏平杨佳诚
Owner KUNMING UNIV OF SCI & TECH
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