Graphene-porous nickel oxide composite catalyst for advanced treatment of waste water, preparation method and application

A composite catalyst and advanced treatment technology, which is applied in the field of water treatment, can solve the problems of low efficiency and low catalytic activity in sewage treatment, and achieve the effects of less energy consumption, obvious COD removal effect and excellent dispersion

Active Publication Date: 2017-11-24
中国科学院上海硅酸盐研究所苏州研究院 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the key problem of low catalytic activity and low efficiency of conventional catalyst catalytic oxidation advanced treatment of sewage, the purpose of the present invention is to provide a low-cost and high-efficiency graphene-porous nickel oxide which can be used for sodium hypochlorite oxidation or ozone oxidation for advanced degradation of wastewater Composite catalyst and preparation method thereof, in order to achieve the purpose of rapid, efficient and cheap advanced treatment of industrial wastewater with high organic matter content

Method used

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  • Graphene-porous nickel oxide composite catalyst for advanced treatment of waste water, preparation method and application
  • Graphene-porous nickel oxide composite catalyst for advanced treatment of waste water, preparation method and application
  • Graphene-porous nickel oxide composite catalyst for advanced treatment of waste water, preparation method and application

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Effect test

Embodiment 1

[0044] Weigh 1.45g of nickel nitrate hexahydrate and 0.3g of urea, add 25ml of ethylene glycol, and sonicate for 30min to fully dissolve the solid drug in the solvent. Pipette 5ml of a well-dispersed 20mg / ml graphene oxide (GO) aqueous solution and add it to the above solution, and ultrasonicate for 30min to disperse the graphene oxide evenly. Then the mixed solution was transferred into a 50ml polytetrafluoroethylene-lined stainless steel hydrothermal kettle, and reacted at 180°C for 10h to obtain a catalyst precursor. The obtained product was washed three times with water and three times with alcohol, then suction filtered and dried in an oven at 50°C for 12 hours. The dried precursor was annealed in a box furnace at 350° C. for 2 h to obtain a graphene-nickel oxide composite catalyst A, and the mass ratio of the graphene carrier to porous nickel oxide was 1:3. mentioned. figure 1 The SEM photo of the prepared graphene-nickel oxide composite catalyst shows that the catalys...

Embodiment 2

[0048] Weigh 2.90 g of nickel nitrate hexahydrate and 0.6 g of urea, add 25 ml of ethylene glycol, and sonicate for 30 minutes to fully dissolve the solid drug in the solvent. Pipette 5ml of a well-dispersed 20mg / ml graphene oxide (GO) aqueous solution and add it to the above solution, and ultrasonicate for 30min to disperse the graphene oxide evenly. Then the mixed solution was transferred into a 50ml polytetrafluoroethylene-lined stainless steel hydrothermal kettle, and reacted at 180°C for 10h to obtain a catalyst precursor. The obtained product was washed three times with water and three times with alcohol, then suction filtered and dried in an oven at 50°C for 12 hours. The dried precursor was annealed in a box furnace at 350° C. for 2 h to obtain a graphene-nickel oxide composite catalyst, and the mass ratio of the graphene carrier to porous nickel oxide was 1:6. Figure 5 This is the SEM photo of the prepared graphene-nickel oxide composite catalyst. The catalyst is co...

Embodiment 3

[0052]Weigh 0.725 g of nickel nitrate hexahydrate and 0.15 g of urea, add 25 ml of ethylene glycol, and sonicate for 30 minutes to fully dissolve the solid drug in the solvent. Pipette 5ml of a well-dispersed 20mg / ml graphene oxide (GO) aqueous solution and add it to the above solution, and ultrasonicate for 30min to disperse the graphene oxide evenly. Then the mixed solution was transferred into a 50ml polytetrafluoroethylene-lined stainless steel hydrothermal kettle, and reacted at 180°C for 10h to obtain a catalyst precursor. The obtained product was washed three times with water and three times with alcohol, then suction filtered and dried in an oven at 50°C for 12 hours. The dried precursor was annealed in a box furnace at 350° C. for 2 h to obtain a graphene-nickel oxide composite catalyst, and the mass ratio of the graphene carrier to porous nickel oxide was 2:3.

[0053] Add 0.2 g of the above catalyst powder into 100 ml of methylene blue aqueous solution with a conce...

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Abstract

The invention relates to a graphene-porous nickel oxide composite catalyst for advanced treatment of waste water, a preparation method and application. The graphene-porous nickel oxide composite catalyst comprises a graphene carrier and porous nickel oxide loaded on the graphene carrier, and the mass ratio of the graphene carrier to the porous nickel oxide is 19: 1-1: 19, and is 10: 1-1: 10 preferably. By the graphene-porous nickel oxide composite catalyst, organic pollutants can be decomposed thoroughly.

Description

technical field [0001] The invention relates to a graphene-porous nickel oxide composite catalyst for catalyzing sodium hypochlorite oxidation or ozone oxidation to treat sewage, a preparation method and application thereof, and belongs to the technical field of water treatment. Background technique [0002] The environmental pollution caused by the rapid development of industry has always been the focus of social attention. Industrial wastewater produced by printing and dyeing, electroplating and other industries often faces high cost, difficult treatment, and serious pollution due to the characteristics of high concentration of organic matter, complex composition, high toxicity, and difficulty in biodegradation. Therefore, effective, cheap and rapid wastewater treatment methods have become a major research hotspot. [0003] The advanced oxidation technology mainly utilizes the generation of highly active free radicals to react with refractory organic molecules to degrade ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755C02F1/72C02F1/76C02F1/78C02F1/32C02F101/30
CPCB01J23/755B01J35/004B01J35/1019C02F1/32C02F1/725C02F1/76C02F1/78C02F2101/308Y02W10/37
Inventor 刘阳桥顾雅洁孙盛睿
Owner 中国科学院上海硅酸盐研究所苏州研究院
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