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Molybdenum disulfide/stannic oxide/mica composite material for photo-induced cathodic protection and preparation method thereof

A technology of photogenerated cathodic protection and composite materials, which is applied in metal material coating technology, liquid chemical plating, coating, etc., can solve the problems of easy recombination with holes, low utilization efficiency of visible light, and large band gap. Achieve the effects of increasing the specific surface area, increasing the visible light response range, and enhancing the conductivity rate

Active Publication Date: 2020-04-07
常州纳欧新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its band gap is large, the utilization efficiency of visible light is not high, and the photogenerated electrons generated by excitation are easy to recombine with holes, so it needs to be modified to improve its photoresponse range and electron separation efficiency.

Method used

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  • Molybdenum disulfide/stannic oxide/mica composite material for photo-induced cathodic protection and preparation method thereof
  • Molybdenum disulfide/stannic oxide/mica composite material for photo-induced cathodic protection and preparation method thereof
  • Molybdenum disulfide/stannic oxide/mica composite material for photo-induced cathodic protection and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. Disperse 200g of mica in 1L of deionized water, heat to 75°C while stirring, adjust the pH to 2.5, add tin tetrachloride pentahydrate solution (1.55L, 300g / L) dropwise to the dispersion, and add hydrogen at the same time Sodium oxide solution (4mol / L) kept the pH of the mixed solution at 2.5, and continued to stir at 75°C for 2h. After cooling to room temperature, suction filtered and washed to neutral. The washed sample was dried at 70°C and dried at 600°C. calcined at lower temperature to obtain tin dioxide / mica composite material;

[0021] 2. Add 270mg of sodium molybdate, 540mg of thioacetamide and 120mg of the tin dioxide / mica composite material prepared in Step 1 into 60mL of deionized water, stir evenly and put it into a hydrothermal kettle, then move the hydrothermal kettle into the oven , under the condition of 220°C for hydrothermal reaction for 24h, after cooling to room temperature, suction filtration, the filter cake was washed and dried at 70°C to obtai...

Embodiment 2

[0023] 1. Disperse 150g of mica in 1L of deionized water, heat to 70°C while stirring, adjust the pH to 2, add tin tetrachloride pentahydrate solution (0.875L, 200g / L) dropwise to the dispersion, and add hydrogen at the same time Sodium oxide solution (3mol / L) kept the pH of the mixed solution at 2, and continued to stir at 70°C for 1h. After cooling to room temperature, suction filtered and washed to neutrality. The washed sample was dried at 60°C and dried at 500°C. calcined at lower temperature to obtain tin dioxide / mica composite material;

[0024] 2. Add 180mg of sodium molybdate, 360mg of thioacetamide and 120mg of the tin dioxide / mica composite material prepared in step 1 into 60mL of deionized water, stir evenly and put it into a hydrothermal kettle, then move the hydrothermal kettle into the oven , hydrothermal reaction at 200°C for 12h, after cooling to room temperature, suction filtration, washing the filter cake and drying at 60°C to obtain molybdenum disulfide / tin...

Embodiment 3

[0026] 1. Disperse 250g of mica in 1L of deionized water, heat to 80°C while stirring, adjust the pH to 3, add tin tetrachloride pentahydrate solution (2.9L, 400g / L) dropwise to the dispersion, and add hydrogen at the same time Sodium oxide solution (5mol / L) kept the pH of the mixed solution at 3, continued to stir at 80°C for 3h, after cooling to room temperature, suction filtered and washed to neutral, the washed sample was dried at 80°C, and dried at 700°C calcined at lower temperature to obtain tin dioxide / mica composite material;

[0027] 2. Add 360mg of sodium molybdate, 720mg of thioacetamide and 120mg of the tin dioxide / mica composite material prepared in step 1 into 60mL of deionized water, stir evenly and put it into a hydrothermal kettle, then move the hydrothermal kettle into the oven , hydrothermal reaction at 240°C for 36h, after cooling to room temperature, suction filtration, washing the filter cake and drying at 80°C to obtain molybdenum disulfide / tin dioxide / ...

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Abstract

The invention belongs to the field of photo-induced cathodic protection materials and particularly relates to a molybdenum disulfide / stannic oxide / mica composite material for photocathode protection and a preparation method thereof. The method is characterized in that mica and tin tetrachloride pentahydrate are used as raw materials, and tin dioxide particles are loaded on a mica sheet through anelectrostatic adsorption method; then, sodium molybdate and thioacetamide are used as raw materials, and molybdenum disulfide grows in situ in stannic oxide particle gaps loaded on the mica sheet through a one-step hydrothermal method, the molybdenum disulfide / stannic oxide / mica composite material with the special appearance is obtained, the specific surface area of a composite material can be greatly increased, exposure of molybdenum disulfide active sites is facilitated due to the unique appearance, the electric conduction rate can be greatly increased, and compounding of photo-induced electrons and holes of the composite material is more effectively prevented, and the method has the remarkable application effect on photo-induced cathodic protection.

Description

technical field [0001] The invention belongs to the field of photocathode protection materials, and in particular relates to a method for preparing a molybdenum disulfide / tin dioxide / mica composite material used for photocathode protection. Background technique [0002] Corrosion of metal materials has brought huge economic losses to the world. The annual loss due to corrosion is about 6 times the sum of natural disasters such as earthquakes, floods, and typhoons. Therefore, metal corrosion and protection technology has always been a hot topic of research by scholars at home and abroad. Environmentally friendly, high-performance and long-term anti-corrosion technology is also the main goal of scientists today. The main technologies of metal corrosion and protection include surface treatment and coating technology, corrosion inhibitor technology, and cathodic protection technology. Photocathodic protection is a new type of cathodic protection technology, which has the advant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F13/12C23C18/12
CPCC23F13/12C23C18/1225C23C18/1216C23C18/1204C23C18/1245
Inventor 姚超王培君左士祥严向玉李霞章刘文杰吴凤芹王灿
Owner 常州纳欧新材料科技有限公司
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