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Micron-scale elemental copper catalyst and preparation method and application thereof

A single copper, micron-scale technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxides/metal hydroxide catalysts, etc., can solve iron sludge pollution, poor safety, expensive and other problems , to achieve the effect of low cost, easy operation and less harsh conditions

Inactive Publication Date: 2014-09-10
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are mainly methods for converting p-nitrophenol into p-aminophenol in the industry, such as p-nitrophenol iron powder reduction method, p-nitrophenol catalytic hydrogenation method, etc., but the former has been phased out due to the large amount of iron sludge pollution, and the latter The latter requires expensive precious metals or Raney nickel as a catalyst, which has the disadvantages of high price and poor safety.

Method used

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  • Micron-scale elemental copper catalyst and preparation method and application thereof
  • Micron-scale elemental copper catalyst and preparation method and application thereof
  • Micron-scale elemental copper catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Preparation of Catalyst Cu Microparticles:

[0018] (1) Preparation of precursors

[0019] Weigh 0.156g (1mmol) of 4,4'-bipyridine and dissolve it in 10mL of methanol, slowly add this solution to the solution containing 0.232g (1mmol) of Cu(NO 3 ) 2 ·3H 2 In the 15mL aqueous solution of O, a blue precipitate is formed. Add 10mL aqueous solution containing 0.210g (1mmol) 1,3,5-tribenzenetriacid and 0.204g (2mmol) triethylamine to the above reaction solution, and stir 40min, suction filtration, to obtain the sky blue precursor complex;

[0020] (2) Preparation of Cu microparticles

[0021] Take 0.2g of the above-mentioned sky blue precursor complex in N 2 Calcining at 400°C for 2 hours under the same conditions can prepare the micron-sized elemental copper catalyst.

[0022] figure 1 The scanning electron microscope image of the micron-sized elemental copper catalyst prepared for this example shows a small particle structure with an average particle size of 1.82 μm...

Embodiment 2

[0024] Preparation of Catalyst Cu Microparticles:

[0025] (1) Preparation of precursors

[0026] Weigh 0.156g (1mmol) 4,4'-bipyridine and dissolve it in 10mL of methanol, slowly add this solution to the dissolved 0.464g (2mmol) Cu(NO 3 ) 2 ·3H 2 In the 15mL aqueous solution of O, a blue precipitate was formed. Add 10mL aqueous solution dissolved with 0.210g (1mmol) 1,3,5-benzenetrilic acid and 0.204g (2mmol) triethylamine to the above reaction solution, and stir for 60min. , suction filtration, to obtain sky blue precursor complex;

[0027] (2) Preparation of Cu microparticles

[0028] Take 0.2g of the above-mentioned sky blue precursor complex in N 2 Calcining at 600°C for 1.5 hours under the same conditions can prepare the micron-sized elemental copper catalyst.

Embodiment 3

[0030] Preparation of Catalyst Cu Microparticles:

[0031] (1) Preparation of precursors

[0032] Weigh 0.156g (1mmol) 4,4'-bipyridine and dissolve it in 10mL of methanol, and slowly add this solution to the dissolved 0.928g (4mmol) Cu(NO 3 ) 2 ·3H 2 In the 15mL aqueous solution of O, a blue precipitate was formed, and 10mL aqueous solution dissolved with 0.210g (1mmol) of 1,3,5-benzenetrilic acid and 0.204g (2mmol) of triethylamine was added to the above reaction solution, and stirred for 2h , suction filtration, to obtain sky blue precursor complex;

[0033] (2) Preparation of Cu microparticles

[0034] Take 0.2g of the above-mentioned sky blue precursor complex in N 2 Calcining at 800°C for 1 hour under the same conditions can prepare the micron-sized elemental copper catalyst.

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Abstract

The invention discloses a micron-scale elemental copper catalyst and a preparation method and application thereof. According to the key points of the technical scheme, the micron-scale elemental copper catalyst is prepared by the steps of reacting copper salt with an organic ligand to form a precursor and then performing calcination under the protection of nitrogen at the temperature of 400 to 800 DEG C, wherein the molar mass ratio of the copper salt (n) to the organic ligand (n) is (1-4) to 1, the copper salt is Cu(NO3)2.3H2O, and the organic ligand is 1,3,5-trimesic acid, terephthalic acid, isophthalic acid, phthalic acid, formic acid or 4,4',4''-s-triazine-1,3,5-three-para aminobenzoic acid. The invention further discloses the preparation method of the catalyst and the application of the catalyst to processing of nitrophenol waste water. The micron-scale elemental copper catalyst has the advantages of environmental friendliness, simple preparation process, high innovativeness and practicability and the like, nitrophenol pollutants in organic waste water can be effectively catalyzed and degraded, and the catalyst has circulating renewable use performance.

Description

technical field [0001] The invention relates to a catalyst for degrading nitrophenol compounds in water bodies, in particular to a micron-sized elemental copper catalyst and its preparation method and application. Background technique [0002] In recent years, water pollution has become an environmental problem of widespread concern around the world. Coupled with the shortage of fresh water resources in the world, the problem of wastewater treatment has attracted more and more attention. At present, with the development of industries such as chemical industry, medicine, pesticide, dyestuff and washing, a large number of organic substances containing aromatic ring structures enter the water body, causing serious water pollution. System and nervous system cause serious damage, causing malignant diseases such as tumors. Among them, nitrophenol organic pollutants are one of the major types. Nitrophenol exists in large quantities in the industrial wastewater of wood preservation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72C02F1/30C02F101/38C02F101/34
Inventor 杨小丽李鹏杨林
Owner HENAN NORMAL UNIV
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