Foamed nickel/MXene-Co3O4 composite electrode and preparation method thereof
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A composite electrode and nickel foam technology, which is applied in the field of electrochemistry, can solve problems such as limiting large-scale applications, and achieve the effects of improving activity and stability, improving electrical conductivity, and excellent performance
Active Publication Date: 2021-08-20
DONGGUAN UNIV OF TECH
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Problems solved by technology
However, binders are often required to load catalysts on substrates, and expensive binders limit the large-scale application of these methods.
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Embodiment 1
[0033] Nickel foam was taken, ultrasonically cleaned three times with sulfuric acid, ethanol, and deionized water in sequence, and dried in a constant temperature oven at a temperature of 50 °C for 1 h; MXene, Co 3 o 4 Mix and oscillate with a vortex oscillator for 2 minutes to prepare mixed powder, apply it evenly on the surface of nickel foam, and vacuum plasma sinter. Composite electrode;
[0034] The nickel foam has a diameter of 2 cm, a pore size of 100 μm, and a thickness of 3 mm; MXene and Co 3 o 4 The mass ratio is 1:6, the mass of the mixed powder is 0.05g, Co 3 o 4 The average particle size is 20nm.
Embodiment 2
[0036] Nickel foam was ultrasonically cleaned twice with sulfuric acid, ethanol, and deionized water in sequence, and dried in a constant temperature oven at 50 °C for 1.2 h; MXene, Co 3 o 4 Mix and oscillate with a vortex oscillator for 2 minutes to prepare mixed powder, evenly spread on the surface of nickel foam, and vacuum plasma sintering. composite electrode;
[0037] The nickel foam has a diameter of 3 cm, a pore size of 200 μm, and a thickness of 3.5 mm; MXene and Co 3 o 4 The mass ratio is 1:5, the mass of the mixed powder is 0.07g, Co 3 o 4 The average particle size is 80nm.
Embodiment 3
[0039] Nickel foam was ultrasonically cleaned three times with sulfuric acid, ethanol, and deionized water in sequence, and dried in a constant temperature oven at 50 °C for 1.5 h; MXene, Co 3 o 4 Mix and oscillate with a vortex oscillator for 4 minutes to obtain a mixed powder, which is evenly spread on the surface of nickel foam and vacuum plasma sintered. The sintering process is: vacuum 55Pa, sintering temperature is 600°C, applied pressure is 2MPa, and the sintering time is 15min. Composite electrode;
[0040] The nickel foam has a diameter of 2.5 cm, a pore size of 150 μm, and a thickness of 4 mm; MXene and Co 3 o 4 The quality of the mixed powder is 0.1g when the mass ratio is 1:4, Co 3 o 4 The average particle size is 50nm.
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Abstract
The invention discloses a foamed nickel/MXene-Co3O4 composite electrode and a preparation method thereof. The preparation method comprises the following steps of: (1) pretreatment of foamed nickel, namely, taking the foamed nickel, carrying out ultrasonic cleaning with sulfuric acid, ethanol and deionized water in sequence, and performing drying at a constant temperature; and (2) preparation of a composite electrode, namely, mixing MXene and Co3O4 to prepare mixed powder, coating the surface of the foamed nickel with the mixed powder, and performing vacuum plasma sintering to prepare the composite electrode. The foam material composite electrode is prepared through the foamed nickel, the MXene and the Co3O4, the MXene-Co3O4 mixed powder is stably combined through the foamed nickel under the high-temperature and high-pressure effects of a vacuum plasma sintering furnace, use of an adhesive is avoided, the preparation cost is reduced, and the preparation time is only 40-60 min; the organ-shaped structure of MXene can effectively accommodate and disperse a catalyst, the problem that the catalyst is easy to agglomerate is overcome, the activity and stability of the catalyst are improved, and the prepared electrode is large in specific surface area, and good in conductivity, and an electrode material with excellent performance can be formed.
Description
technical field [0001] The invention relates to the field of electrochemical technology, specifically a nickel foam / MXene-Co 3 o 4 Composite electrode and its preparation method. Background technique [0002] With the rapid development of my country's economy and society, the degree of industrialization and urbanization continues to increase, and the shortage of water resources caused by water pollution is becoming more and more serious. Due to its ubiquity in industrial and commercial products as well as its high water solubility and resistance to biodegradation, 1,4-dioxane has been found in many places as a water pollutant. At present, traditional wastewater treatment technologies, including air extraction, sedimentation coagulation, carbon adsorption and traditional biological treatment, cannot effectively remove 1,4-dioxane. In recent years, because persulfate advanced oxidation technology can generate strong oxidative active species (such as sulfate radical and hydr...
Claims
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Application Information
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