Preparation method and application of magnetic CuxO-Fe2O3 nano ozone catalyst

A cuxo-fe2o3, magnetic nano technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical instrument and method, etc., can solve the problem of low mineralization rate efficiency and small pH application range , high cost of nanoparticle preparation and other issues, to achieve the effect of low cost

Active Publication Date: 2016-07-27
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of high preparation cost of nanoparticles in heterogeneous catalysts, difficulty in recycling, limited pH application range, easy dissolution and loss, etc., aiming to provide a magnetic nano-Cu x O-Fe 2 o 3 Preparation method and application of ozone catalyst
[0006] Cu of the present invention x O-Fe 2 o 3 The catalyst not only overcomes the slow oxidation rate and low mineralization rate efficiency when ozone alone removes pollutants, but also the problems that homogeneous catalysts cannot be recycled and reused, and secondary pollution is introduced.
It also overcomes the problems of unstable catalytic effect of metal oxide catalysts, small pH application range, and difficult recovery of nanoparticles, etc.

Method used

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  • Preparation method and application of magnetic CuxO-Fe2O3 nano ozone catalyst
  • Preparation method and application of magnetic CuxO-Fe2O3 nano ozone catalyst
  • Preparation method and application of magnetic CuxO-Fe2O3 nano ozone catalyst

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Experimental program
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Effect test

Embodiment 1

[0032] (1) Cu x O-Fe 2 o 3 Preparation: Cu(NO 3 ) 2 ·3H 2 Dissolve O in water, stirring and dissolving to form 0.1mol / L Cu(NO 3 ) 2 solution, then add 5.6g of iron powder and 0.1‰ volume of ammonium citrate dispersant to 100mL of the solution, mechanically stir at 120°C for 1h, dry the solid particles and the solution at 110°C for 3h, and finally place the solid in Calcined at 500°C for 1 h to obtain Cu x O-Fe 2 o 3 Magnetic Nanomaterials. Its SEM photo see figure 1 , the catalyst is a uniform ellipsoid particle with a size of about 60nm.

[0033] (2) Preparation of CuO: Cu(NO 3 ) 2 ·3H 2 Dissolve O in water, stirring and dissolving to form 0.1mol / L Cu(NO 3 ) 2 solution, then add 0.1‰ volume of ammonium citrate dispersant to 100mL of the solution, mechanically stir at 120°C for 1h, dry the solid particles and the solution at 110°C for 3h, and finally calcinate the solid at 500°C for 1.5h , to get CuO.

[0034] (3) Fe 2 o 3 Preparation: Add 5.6g of iron powd...

Embodiment 2

[0036] Cu(NO 3 ) 2 ·3H 2 Dissolve O in water, stirring and dissolving to form 0.2mol / L Cu(NO 3 ) 2 solution, then add 5.6g of iron powder and 0.5‰ volume of sodium citrate dispersant to 100mL of the solution, mechanically stir at 120°C for 1.5h, dry the solid particles and the solution at 100°C for 4h, and finally dissolve the solid Calcined at 450°C for 2h to obtain Cu x O-Fe 2 o 3 Magnetic Nanomaterials.

Embodiment 3

[0038] Cu x O-Fe 2 o 3 Preparation: Cu(NO 3 ) 2 ·3H 2 Dissolve O in water, stirring and dissolving to form 0.1mol / L Cu(NO 3 ) 2 solution, then add 11.2g of iron powder and 1‰ volume of potassium citrate dispersant to 100mL of the solution, mechanically stir at 120°C for 2h, dry the solid particles and the solution at 120°C for 2h, and finally place the solid in Calcined at 550°C for 2h to obtain Cu x O-Fe 2 o 3 Magnetic Nanomaterials.

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Abstract

The invention relates to a preparation method and application of a CuxO-Fe2O3 nano material, and belongs to the technical field of advanced waste water treatment and environmental catalysis.The CuxO-Fe2O3 nano material is prepared through an impregnation method, the CuxO-Fe2O3 nano material serves as a catalyst and is added into organic waste water which is difficult to degrade to catalyze an ozone reaction, degradation of organic contaminants is promoted, and the mineralization rate of organic matter is greatly increased; the CuxO-Fe2O3 nano material is small in size and good in dispersity in a nano material system, CuxO-Fe2O3 has magnetism, the catalyst subjected to the reaction can be effectively separated from water and recycled by means of an external magnetic field, the catalyst is good in stability, and the high catalytic activity can still be maintained after the catalyst is repeatedly used three times.The added CuxO-Fe2O3 catalyst can obviously improve the the removal efficiency of ozone to the contaminants, a good catalytic effect can be achieved on the condition that the pH ranges from 3 to 11, and the catalyst is small in dosage and stable in repeatedly used performance and has a wide prospect in water treatment.

Description

technical field [0001] The present invention specifically relates to a kind of magnetic nano material Cu x O-Fe 2 o 3 The preparation method of an ozone catalyst and its application in catalytic ozone removal of pollutants in wastewater belong to the technical field of advanced wastewater treatment and environmental catalysis, and are suitable for the treatment of refractory organic wastewater. Background technique [0002] Ozone has a high redox potential (2.07V) and has received extensive attention in the field of water treatment due to its strong oxidizing ability. However, there are also shortcomings. The reaction between ozone and organic matter usually generates small molecule aldehydes or carboxylic acids, which do not further react with ozone, resulting in low mineralization rate of ozone-oxidized organic matter. Compared with the single ozonation reaction, the catalytic ozonation technology is an advanced oxidation technology. The main mechanism is to catalyze th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J35/02C02F1/78C02F101/30
CPCB01J23/745B01J35/0033B01J35/026C02F1/725C02F1/78C02F2101/30
Inventor 吴德礼刘莹何宏平
Owner TONGJI UNIV
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