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Preparation method for MoS2/graphene-foam nickel cathode and application of MoS2/graphene-foam nickel cathode in microbial electrolysis cell

A microbial electrolytic cell and nickel foam technology, applied in the electrolysis process, electrolysis components, electrodes, etc., can solve the problems of low mechanical strength of airgel, weak MoS2 bonding, and limited application, so as to enrich the catalytic active sites, Good electrical conductivity and stability, good electrical conductivity

Active Publication Date: 2019-03-12
GUANGXI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the way of coating may cause MoS 2 The bond is not strong, and the mechanical strength of airgel is low, which will limit its application
Given MoS 2 With excellent catalytic hydrogen evolution performance and easy availability of raw materials, more MoS-based 2 Related studies of the cathode, MoS 2 The poor electrical conductivity limits its application in catalytic hydrogen evolution
However, there is no use of MoS 2 Related reports on the preparation of MEC cathode catalytic materials combined with graphene

Method used

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  • Preparation method for MoS2/graphene-foam nickel cathode and application of MoS2/graphene-foam nickel cathode in microbial electrolysis cell
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  • Preparation method for MoS2/graphene-foam nickel cathode and application of MoS2/graphene-foam nickel cathode in microbial electrolysis cell

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Effect test

Embodiment 1

[0025] 1) Cut the nickel foam into a 5cm*3cm block carrier, then immerse it in an acetone solution for 20 minutes to remove surface impurities, and then wash it with deionized water for 5 times to remove the residual acetone on the surface. Dry and set aside.

[0026] 2) Accurately weigh 100 mg few-layer graphene oxide with an analytical balance, disperse it in 150 mL of N,N-dimethylformamide (DMF) solvent, add 440 mg (NH 4 ) 2 MoS 4 , and ultrasonically shake at room temperature for 10 minutes until the sample is evenly dispersed, then add 2 mL of reducing N 2 h 4 ·H 2 O, continue ultrasonication for 30min, transfer the above-mentioned mixed solution to a 200mL autoclave with Teflon lining, and soak the foam nickel cut in 1) in the mixed solution, and cover it After tightening, place it in an oven for hydrothermal reaction at 200°C for 10 hours;

[0027] 3) After 2) the reactor is cooled to room temperature, take out the nickel foam, and then wash it with absolute ethan...

Embodiment 2

[0035] 1) Cut the nickel foam into a 5cm*3cm block carrier, then immerse it in an acetone solution for 20 minutes to remove surface impurities, and then wash it with deionized water for 5 times to remove the residual acetone on the surface. Dry and set aside.

[0036] 2) Weigh 150mg of few-layer graphene oxide, disperse it in 150mL of N,N-dimethylformamide (DMF) solvent, add 440mg (NH 4 ) 2 MoS 4 , ultrasonically oscillate at room temperature for 10 min until the sample is evenly dispersed, and then add 2 mL of reducing N 2 h 4 ·H 2 O, continue ultrasonication for 30min, transfer the above-mentioned mixed solution to a 200mL autoclave with Teflon lining, and soak the foam nickel cut in 1) in the mixed solution, and cover it After tightening, place it in an oven for hydrothermal reaction at 200°C for 10 hours;

[0037] 3) After 2) the reactor is cooled to room temperature, take out the nickel foam, and then wash it with absolute ethanol and deionized water for 3 times to ...

Embodiment 3

[0042] 1) Cut a block-shaped nickel foam substrate carrier with a size of 5cm*3cm, and then immerse it in an acetone solution for 10 minutes to remove surface impurities, and then wash it with deionized water for 5 times to remove residual acetone on the surface. Set aside to dry.

[0043] 2) Weigh 200mg of few-layer graphene oxide, disperse it in 150mL of N,N-dimethylformamide (DMF) solvent, add 440mg (NH 4 ) 2 MoS 4 , ultrasonically oscillate at room temperature for 10 min until the sample is evenly dispersed, and then add 2 mL of reducing N 2 h 4 ·H 2 0, continue ultrasonication for 30min, transfer the above mixed solution to a 200mL autoclave with polytetrafluoroethylene lining, and soak the foam nickel cut in 1) in the solution, cover and tighten Place it in an oven for hydrothermal reaction at 200°C for 10 hours;

[0044] 3) After 2) the reactor is cooled to room temperature, take out the nickel foam, and then wash it with absolute ethanol and deionized water for 3...

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Abstract

The invention discloses a preparation method for an MoS2 / graphene-foam nickel cathode and application of the MoS2 / graphene-foam nickel cathode in a microbial electrolysis cell. The preparation methodcomprises the following steps that 1), impurity removal pretreatment is carried out on foam nickel; 2), a few layers of graphene oxide are dispersed in N,N-dimethylformamide (DMF), then (NH4)2MoS4 andN2H4.H2O are added, the mixture is uniformly mixed by ultrasounds, then the mixed solution is moved to a high-pressure reactor for a hydrothermal reaction, meanwhile foam nickel in the first step isplaced in the mixed solution, after the reaction is finished, the MoS2 / graphene-foam nickel is washed, frozen and dried, and the MoS2 / graphene-foam nickel cathode is obtained; and when applied, the MoS2 / graphene-foam nickel cathode is applied in the MEC to investigate hydrogen production performance and the COD removal effect. The MoS2 / graphene-foam nickel cathode has the beneficial effects of uniform surface morphology, large specific surface area, good catalytic hydrogen evolution performance and the like, the raw materials are environmentally-friendly, cheap and easy to obtain, no adhesiveis needed in the preparation process, the conductivity and stability are good, and the MoS2 / graphene-foam nickel cathode also shows excellent pollution control capacity effect in the MEC.

Description

technical field [0001] The present invention relates to the preparation method of nano material, specifically a kind of MoS 2 / The preparation method of graphene-nickel foam cathode and its application in microbial electrolysis cell. Background technique [0002] Energy crisis and environmental pollution are two major challenges facing human society. Hydrogen energy is considered as an ideal renewable energy because of its high combustion calorific value, no pollutants produced during the combustion process, wide application range, abundant resources and raw materials required for preparation, and storage and transportation. At present, hydrogen production technologies mainly include electrocatalytic water splitting hydrogen production, dark fermentation hydrogen production, MEC hydrogen production and photocatalytic water splitting hydrogen production technology. Among them, MEC hydrogen production is a very promising method, because MEC can simultaneously realize sewage ...

Claims

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Application Information

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IPC IPC(8): C25B11/03C25B11/06C25B1/04
CPCC25B1/04C25B11/031C25B11/051C25B11/057C25B11/091Y02E60/36
Inventor 王双飞侯燕萍黄婧赫爽许友袁桂云
Owner GUANGXI UNIV
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