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Foam nickel composite material and preparation method thereof, and application of foam nickel to photoelectrocatalytic removal of pollutants in water body

A technology of composite materials and nickel foam, which is applied in the preparation of composite materials, nickel foam composite materials and its preparation, and the application fields of photoelectric catalytic removal of pollutants in water bodies, can solve the problem of low surface adsorption rate, large band gap, difficult Recycling and other issues, to achieve the effect of solving recycling and reuse, good electrical conductivity, and narrow band gap

Active Publication Date: 2019-01-15
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For traditional photocatalysts, such as zinc oxide, there are disadvantages such as low surface adsorption rate, large band gap, and difficulty in recycling during the application process; secondly, the recombination probability of photogenerated electrons and holes generated by photocatalysts after being irradiated by light is relatively high, so photons The utilization efficiency is low, and the photocatalytic activity is not high; for the loaded photocatalytic reaction system, due to the greatly reduced light utilization efficiency, the catalytic activity is even less ideal

Method used

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  • Foam nickel composite material and preparation method thereof, and application of foam nickel to photoelectrocatalytic removal of pollutants in water body
  • Foam nickel composite material and preparation method thereof, and application of foam nickel to photoelectrocatalytic removal of pollutants in water body
  • Foam nickel composite material and preparation method thereof, and application of foam nickel to photoelectrocatalytic removal of pollutants in water body

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The preparation of foamed nickel-supported zinc oxide composite material (NF@ZnO) is as follows:

[0033] Dissolve 4.958 g of zinc nitrate hexahydrate and 2.59 g of zinc formate in deionized water to make a 100 ml mixed solution, which is used as the electrolyte solution, using a three-electrode system (nickel foam cut into a size of 1 cm×2.5 cm, The surface was ultrasonically washed with dilute hydrochloric acid as the working electrode, the platinum wire electrode was used as the counter electrode, and the calomel electrode was used as the reference electrode). Electrodeposition was performed on the electrochemical workstation CHI660E, and the temperature of the electrolyte solution during electrodeposition was 25 °C. Firstly, a voltage of -1.3 V was set on the working electrode for 10 s; after that, a voltage of -1.0 V was set on the working electrode for 200 s, and repeated twice under this voltage. The samples were taken out from the working electrode and dried in ...

Embodiment 2

[0035] Dissolve 4.958 g of zinc nitrate hexahydrate and 2.59 g of zinc formate in deionized water to make a 100 ml mixed solution, which is used as the electrolyte solution, using a three-electrode system (nickel foam cut into 1 cm × 2.5 cm The size and surface were ultrasonically washed with dilute hydrochloric acid and used as the working electrode, the platinum wire electrode as the counter electrode, and the calomel electrode as the reference electrode). First, the voltage of the working electrode was set to -1.3 V for 10 s; then the voltage of the working electrode was set to -1.0 V for 200 s, and the deposition was repeated twice at this voltage. The samples were taken out from the working electrode and dried in a blast oven at 60 °C for 1.5 h. After that, it was placed in a tube furnace and calcined for 1 h at a temperature of 350 °C (heating rate: 2 °C / min) in an argon atmosphere to obtain a foamed nickel-supported zinc oxide composite material (NF@ZnO). The photocurr...

Embodiment 3

[0037] Dissolve 4.958 g of zinc nitrate hexahydrate and 2.59 g of zinc formate in deionized water, stir to make a 100ml mixed solution, use this mixed solution as the electrolyte solution, and use a three-electrode system (the treated nickel foam is used as the working electrode , a platinum wire electrode as a counter electrode, and a calomel electrode as a reference electrode), electrodeposition was performed on an electrochemical workstation CHI660E, and the temperature of the electrolyte solution during electrodeposition was 85 °C. Firstly, a voltage of -1.3 V was set on the working electrode for 10 s; after that, a voltage of -1 V was set on the working electrode for 200 s, and repeated twice under this voltage. The samples were taken out from the working electrode and dried in a forced air oven at 60 °C for 1.5 h. After that, it was placed in a tube furnace and calcined for 1 h at 350 °C (heating rate: 2-5 °C / min) in an argon atmosphere to obtain a nickel-foamed zinc oxi...

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Abstract

The invention discloses a foam nickel composite material and a preparation method thereof, and the application of the foam nickel composite material to photoelectrocatalytic removal of pollutants in awater body. The preparation method comprises the following steps: preparing a foam nickel-supported zinc oxide composite material (NF@ZnO) through electrodeposition multiple times; and then preparinga composite material (NF@ZnO@LDH) of a foam nickel-loaded zinc oxide nanosheets and zinc-iron double-metal hydroxide nanosheets by using a hydrothermal process. When the foam nickel composite material is used for a catalytic reaction, the foam nickel composite material is used as a positive electrode material in a three-electrode system, and a small forward bias is applied while illumination is performed on the foam nickel composite material; photoproduced electrons produced by the composite material under the excitation of illumination are rapidly transferred to a counter electrode, so the efficient separation of photoproduced electrons and photoproduced holes is promoted; the photoproduced electrons with strong reducing ability can reduce highly-toxic hexavalent chromium ions (Cr(VI)) in a water body into low-toxicity trivalent chromium ions (Cr(III)); and the photoproduced holes remaining in the surface of the anode composite catalytic material can oxidatively degrade small molecules of organic pollutants in water.

Description

technical field [0001] The invention relates to the technical field of nanocomposite materials and photoelectric catalysis, in particular to a nickel foam composite material and its preparation method and its application in photoelectric catalytic removal of water body pollutants, in particular to a nickel foam loaded with zinc oxide and zinc-iron bimetallic The preparation method of the composite material of hydroxide and its application in photoelectric catalytic removal of pollutants in water bodies. Background technique [0002] Photocatalytic technology is an advanced technology that converts many chemical reactions that need to occur under harsh conditions into reactions in a mild environment by using photon energy through catalysts. The energy source of this technology is clean and inexhaustible sunlight, which has the advantages of cost-effectiveness, environmental friendliness and so on. Most of the current research uses semiconductor powder suspension system, whic...

Claims

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Application Information

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IPC IPC(8): B01J23/80B01J35/02B01J35/04C02F1/30C02F1/72C02F101/22
CPCC02F1/30C02F1/725B01J23/80C02F2101/22C02F2305/10B01J35/56B01J35/40B01J35/39
Inventor 路建美李娜君
Owner SUZHOU UNIV
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