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Preparation method and application for efficient and stable foam nickel base photocatalytic material

A technology for photocatalytic materials and stable foams, which is applied in the field of preparation of highly efficient and stable foamed nickel-based photocatalytic materials, to achieve the effects of enhancing absorption and utilization, promoting the separation of electrons and holes, and good development prospects

Active Publication Date: 2018-01-12
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no report on the application of silver / zinc oxide nanorod array / nickel foam composite material as a photocatalytic material in the treatment of antibiotic wastewater, and the filtration performance of the porous material of the composite material is used to improve the degradation efficiency.

Method used

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  • Preparation method and application for efficient and stable foam nickel base photocatalytic material
  • Preparation method and application for efficient and stable foam nickel base photocatalytic material
  • Preparation method and application for efficient and stable foam nickel base photocatalytic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Preparation of zinc oxide crystal layer / nickel foam: Configure 10mmol / L zinc acetate methanol solution, pull several times on the pretreated nickel foam surface by dipping and pulling method, and infrared dry the obtained sample for 5 minutes after each dipping, Baking at 200°C for 30min in a muffle furnace, and cooling to room temperature naturally;

[0026] (2) Preparation of zinc oxide nanorods / nickel foam: configure a mixed aqueous solution of 0.1mol / L zinc nitrate and 0.1mol / L hexamethylenetetramine, transfer it to a polytetrafluoroethylene reactor, and place the product obtained in step 2) vertically into the reaction kettle, and the reaction kettle is placed in an electric heating constant temperature blast drying oven, the reaction temperature is 95°C, and the reaction time is 6h;

[0027] (3) In-situ photoreduction of silver nanoparticles: Take out the product obtained in step 3), rinse it with deionized water for several times, dry it, immerse it in a 1mmo...

Embodiment 2

[0033] (1) Photocatalytic performance test of silver / zinc oxide nanorod array / nickel foam photocatalytic composite

[0034]The materials prepared in Example 1 were used to degrade 100 ml of methyl orange aqueous solution with a concentration of 10 mg / L. Under light-shielding conditions, the photocatalyst material in Example 1 was placed vertically in a reactor equipped with methyl orange quartz, and the light source was a 20W ultraviolet lamp. Before the reaction starts, expose to air and stir, avoid light and absorb for 30 minutes to reach adsorption-desorption equilibrium, turn on the UV lamp, and take samples every 10 minutes, 3ml each time, measure the absorbance value at a wavelength of 462nm with a UV-visible spectrophotometer. Figure 4 Result shows that the silver / zinc oxide nanorod array / nickel foam material prepared under the optimum conditions of embodiment 1 reaches 99% to methyl orange degradation rate 60min, is higher than zinc oxide nanorod array / nickel foam (93...

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Abstract

The invention belongs to the technical field of photocatalysis and sewage processing, and provides a preparation method and application for an efficient and stable foam nickel base photocatalytic material. Foam nickel is taken as a substrate, a crystal layer method is adopted to load a zinc oxide crystal layer, then, a hydrothermal method is utilized to enable a zinc oxide nano array along the zinc oxide crystal layer, and silver nanoparticles are deposited on the surface of the zinc oxide nano array by in situ photo-reduction to obtain silver / zinc oxide nanorod array / foam nickel self-supporting materials. The related preparation method is simple. The zinc oxide nanorod array is directly loaded to the surface of the foam nickel, and the surface stability of the material is improved; according to a silver / zinc oxide nanorod array / foam nickel ternary complex structure, the adsorption and the utilization of light are enhanced, meanwhile, electrons and holes are accelerated to separate, and photocatalysis activity is improved; the self-supporting structure can be used for overcoming the defects of separation recovery, binding agent coating, big possibility of agglomeration and thelike of powdery catalyst. The porous structure filtering performance of the photocatalytic material is used for cooperating with photocatalytic degradation to further improve the degradation of dye and antibiotic waste water.

Description

technical field [0001] The invention relates to a preparation method and application of a high-efficiency and stable foam nickel-based photocatalytic material, and belongs to the technical field of photocatalytic composite materials and sewage treatment. Background technique [0002] The health problems caused by antibiotic pollution have recently received extensive and close attention from experts and scholars around the world, and the overall environmental discharge pollution load is relatively high; the existence of drug-resistant bacteria and increasingly widespread resistance genes in the environment is a great risk to human health and threats. Photocatalysts are widely used to degrade water pollutants, and are expected to achieve low-energy and high-efficiency antibiotic degradation. [0003] Zinc oxide (ZnO) is a wide-bandgap (3.37eV) semiconductor material with excellent optical and electrical properties. However, due to the presence of donor-type defects such as ox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89C02F9/08C02F101/30C02F103/34
Inventor 柳丽芬张艺臻杨凤林
Owner DALIAN UNIV OF TECH
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