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Application of sulfur boundary defect molybdenum disulfide in electrochemical seawater uranium extraction

A boundary defect, molybdenum disulfide technology, applied in electrodes, electrolysis components, electrolysis process, etc., can solve problems such as poor stability

Active Publication Date: 2022-04-26
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the stability of the material must also be ensured during the electroreduction process. In the electroreduction of uranium, the reaction of electrolysis of water is very likely to occur, which may lead to two-dimensional catalysts and electrolysis of water, resulting in poor stability.

Method used

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  • Application of sulfur boundary defect molybdenum disulfide in electrochemical seawater uranium extraction
  • Application of sulfur boundary defect molybdenum disulfide in electrochemical seawater uranium extraction
  • Application of sulfur boundary defect molybdenum disulfide in electrochemical seawater uranium extraction

Examples

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Effect test

Embodiment 1

[0050] An application of molybdenum disulfide with sulfur boundary defects in electrochemical seawater extraction of uranium, comprising the following steps:

[0051] Step 1. Add 5 mg of sulfur boundary defect molybdenum disulfide, 5 mg of activated carbon and 35 μL of Nafion solution (5 wt%) into 2 mL of ethanol, and ultrasonically obtain a uniform ink; uniformly coat the ink in a square shape of 1 × 2 cm as a carbon graphite felt above, after drying (70°C, 3h), it is used as the working electrode in the two-electrode system; and the counter electrode in the two-electrode system is a graphite rod;

[0052] Step II, filter the seawater through a 0.2 μm filter to remove particles and microorganisms, then add uranyl nitrate to the seawater to obtain simulated uranium seawater (the concentration of uranyl nitrate in the simulated uranium seawater is 8ppm), add 100mL of simulated uranium seawater In the electrolytic cell, place the double-electrode system in the simulated uranium ...

Embodiment 2

[0057] An application of molybdenum disulfide with sulfur boundary defects in electrochemical seawater extraction of uranium, comprising the following steps:

[0058] Step 1. Add 5 mg of sulfur boundary defect molybdenum disulfide, 5 mg of activated carbon and 35 μL of Nafion solution (5 wt%) into 2 mL of ethanol, and ultrasonically obtain a uniform ink; uniformly coat the ink in a square shape of 1 × 2 cm as a carbon graphite felt above, after drying (70°C, 3h), it is used as the working electrode in the two-electrode system; and the counter electrode in the two-electrode system is a graphite rod;

[0059] Step II, filter the seawater through a 0.2 μm filter to remove particles and microorganisms, then add uranyl nitrate to the seawater to obtain simulated uranium seawater (the concentration of uranyl nitrate in the simulated uranium seawater is 20ppm), add 100mL of simulated uranium seawater In the electrolytic cell, place the double-electrode system in the simulated uranium...

Embodiment 3

[0064] An application of molybdenum disulfide with sulfur boundary defects in electrochemical seawater extraction of uranium, comprising the following steps:

[0065] Step 1. Add 5 mg of sulfur boundary defect molybdenum disulfide, 5 mg of activated carbon and 35 μL of Nafion solution (5 wt%) into 2 mL of ethanol, and ultrasonically obtain a uniform ink; uniformly coat the ink in a square shape of 1 × 2 cm as a carbon graphite felt above, after drying (70°C, 3h), it is used as the working electrode in the two-electrode system; and the counter electrode in the two-electrode system is a graphite rod;

[0066] Step II, filter the seawater through a 0.2 μm filter to remove particles and microorganisms, then add uranyl nitrate to the seawater to obtain simulated uranium seawater (the concentration of uranyl nitrate in the simulated uranium seawater is 100ppm), add 100mL of simulated uranium seawater In the electrolytic cell, place the double-electrode system in the simulated uraniu...

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Abstract

The invention discloses an application of sulfur boundary defect molybdenum disulfide in electrochemical seawater uranium extraction, which comprises the following steps: adding sulfur boundary defect molybdenum disulfide, activated carbon and a Nafion solution into ethanol, and carrying out ultrasonic treatment to obtain uniform ink; carbon graphite felt is uniformly coated with the ink, and the ink is used as a working electrode in a dual-electrode system after being dried; a counter electrode in the dual-electrode system is a graphite rod; the method comprises the following steps: filtering seawater through a 0.2 [mu] m filter to remove particles and microorganisms, then adding uranyl nitrate into the seawater to obtain simulated uranium seawater, adding the simulated uranium seawater into an electrolytic tank, placing a dual-electrode system into the simulated uranium seawater of the electrolytic tank, stirring the simulated seawater for electrolysis to extract uranium from the seawater, setting the voltage of the electrolytic tank to be-3 to-3.5 V, and electrolyzing for 1-10 hours. The molybdenum disulfide nanosheet with the sulfur boundary defect is prepared and is applied to uranium extraction of uranium seawater by simulating uranium; the sulfur boundary defect molybdenum disulfide nanosheet shows considerable extraction capacity, which indicates that the molybdenum disulfide nanosheet can realize high uranium extraction amount in the ocean.

Description

technical field [0001] The invention relates to the technical field of uranium extraction from seawater, in particular to the application of sulfur boundary defect molybdenum disulfide in electrochemical seawater uranium extraction. Background technique [0002] The nuclear industry now provides 13% of the world's electricity generation and, according to IAEA projections, will be the main source of energy in the coming decades. At the same time, radionuclides are increasingly used in military, industrial, agricultural, medical and other scientific research, and uranium is a key element of nuclear fuel, so the mining of uranium is very important. Uranium reserves on land (totaling 4.85 million tonnes) are expected to be depleted in less than a century. The total amount of uranium contained in seawater around the world is about 4.5 billion tons, about 1,000 times that of land rocks, enough for human use for 72,000 years. However, the low uranium content (3.3 μg / L) in seawate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/01C25B11/075
CPCC25B1/01C25B11/075Y02P10/20
Inventor 竹文坤唐兴睿何嵘陈涛雷佳孙囡杨帆刘欢欢
Owner SOUTHWEAT UNIV OF SCI & TECH
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