Preparation method and application of metallic Ag nano-particle deposited NiCo-LDH composite photocatalyst

A nanoparticle and composite light technology, which is applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of low electron-hole pair separation efficiency and photoresponse Narrow range, low photocatalytic degradation rate, etc.

Active Publication Date: 2018-04-13
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects existing in the prior art, such as: the photoresponse range of the existing photocatalytic material is narrow, the separation efficiency of the electron-hole pair is low, the photocatalytic degradation rate is low, etc. The present invention provides metal Ag nano Particle deposited nickel cobalt-layered double metal hydroxide composite photocatalyst (Metal Ag nanoparticle deposited NiCo-LDH composite photocatalyst)

Method used

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  • Preparation method and application of metallic Ag nano-particle deposited NiCo-LDH composite photocatalyst
  • Preparation method and application of metallic Ag nano-particle deposited NiCo-LDH composite photocatalyst
  • Preparation method and application of metallic Ag nano-particle deposited NiCo-LDH composite photocatalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of NiCo-LDH material:

[0030] Weigh 0.45 mmol of nickel nitrate, 0.3 mmol of cobalt nitrate, 4 mmol of ammonium chloride and 2.06 mmol of sodium hydroxide and dissolve them in deionized water, stir at room temperature to form a mixed solution; Finally, it was centrifuged, washed alternately with water and ethanol, and dried at 60°C to obtain the NiCo-LDH material.

[0031] (2) Preparation of Ag nanoparticles modified NiCo-LDH composite photocatalyst:

[0032] 0.011 g of silver nitrate and 0.1 g of NiCo-LDH were dispersed in deionized water, irradiated under ultraviolet light for 30 min, centrifuged, washed alternately with water and ethanol, and dried at 60 °C to obtain Ag nanoparticles modified NiCo-LDH composite photocatalyst.

[0033] (3) Evaluation of photocatalytic activity:

[0034] The NiCo-LDH composite photocatalyst sample modified by Ag nanoparticles in step (2) was taken, and the photocatalytic degradation test was carried out in a photoche...

Embodiment 2

[0036] (1) Preparation of NiCo-LDH material:

[0037] Weigh 0.45 mmol of nickel nitrate, 0.3 mmol of cobalt nitrate, 4 mmol of ammonium chloride and 2.06 mmol of sodium hydroxide and dissolve them in deionized water, stir at room temperature to form a mixed solution; Finally, it was centrifuged, washed alternately with water and ethanol, and dried at 60°C to obtain the NiCo-LDH material.

[0038] (2) Preparation of Ag nanoparticles modified NiCo-LDH composite photocatalyst:

[0039] 0.016 g of silver nitrate and 0.1 g of NiCo-LDH were dispersed in deionized water, irradiated under ultraviolet light for 30 min, centrifuged, washed alternately with water and ethanol, and dried at 60 °C to obtain Ag nanoparticles modified NiCo-LDH composite photocatalyst.

[0040] (3) Evaluation of photocatalytic activity:

[0041]The NiCo-LDH composite photocatalyst sample modified by Ag nanoparticles in step (2) was taken, and the photocatalytic degradation test was carried out in a photochem...

Embodiment 3

[0043] (1) Preparation of NiCo-LDH material:

[0044] Weigh 0.45 mmol of nickel nitrate, 0.3 mmol of cobalt nitrate, 4 mmol of ammonium chloride and 2.06 mmol of sodium hydroxide and dissolve them in deionized water, stir at room temperature to form a mixed solution; Finally, it was centrifuged, washed alternately with water and ethanol, and dried at 60°C to obtain NiCo-LDH material.

[0045] (2) Preparation of Ag nanoparticles modified NiCo-LDH composite photocatalyst:

[0046] 0.024 g of silver nitrate and 0.1 g of NiCo-LDH were dispersed in deionized water, irradiated under ultraviolet light for 30 min, centrifuged, washed alternately with water and ethanol, and dried at 60 °C to obtain Ag nanoparticles modified NiCo-LDH composite photocatalyst.

[0047] (3) Evaluation of photocatalytic activity:

[0048] The NiCo-LDH composite photocatalyst sample modified by Ag nanoparticles in step (2) was taken, and the photocatalytic degradation test was carried out in a photochemica...

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Abstract

The invention belongs to the technical field of preparation of environment materials, and concretely relates to a preparation method and an application of a metallic Ag nano-particle deposited NiCo-LDH composite photocatalyst. The preparation method of the metallic Ag nano-particle deposited NiCo-LDH composite photocatalyst mainly comprises the following steps: heating nickel nitrate, cobalt nitrate, ammonium chloride, sodium hydroxide and deionized water used as raw materials in a water bath to obtain a NiCo-LDH material; and radiating the NiCo-LDH material, silver nitrate and water which areused as raw materials under an ultraviolet lamp for a certain time to prepare the metallic Ag nano-particle modified NiCo-LDH composite photocatalyst used for photocatalytic degradation of tetracycline. A low-temperature water bath process is adopted, so the energy consumption in the synthesis process is low; and the synthesized NiCo-LDH composite material has a ball flower-shaped structure, anddeposition of silver makes the obtained metallic Ag nano-particle deposited NiCo-LDH composite photocatalyst have a greatly improved electron-hole pair separation efficiency and an excellent tetracycline photocatalytic degradation performance.

Description

technical field [0001] The invention belongs to the technical field of environmental material preparation, and in particular relates to the preparation and application of a NiCo-LDH composite photocatalyst deposited by metallic Ag nanoparticles. Background technique [0002] Antibiotics are chemical substances produced by certain microorganisms, animals and plants, substances that can inhibit the proliferation of microorganisms and other cells, and are widely used as drugs for treating various bacterial infections or inhibiting pathogenic microbial infections. Among them, tetracycline has produced a large amount of organic wastewater in its production process in recent years. Tetracycline wastewater contains high-concentration organic substances such as finished antibiotics and pharmaceutical intermediates, which have high antibacterial ability and are difficult to biodegrade, causing great harm to water pollution. Traditional treatment methods, such as adsorption and biode...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89C02F1/30C02F101/38C02F103/34
CPCB01J23/007B01J23/892B01J35/004B01J35/006C02F1/30C02F2101/38C02F2103/343C02F2305/10
Inventor 汪涛刘锡清马长畅闫永胜霍鹏伟
Owner JIANGSU UNIV
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