Preparation method of quantum dot modified nanosheet composite material

A technology of composite materials and quantum dots, applied in chemical instruments and methods, electrodes, electrolytic processes, etc., can solve the problem of no carbon-based organic compounds, achieve simple equipment, broad application prospects, and improve oxygen evolution performance

Pending Publication Date: 2022-03-25
SHUNDE GRADUATE SCHOOL UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although hydrogen (H 2 ) is a great energy carrier (and fuel) produced by water splitting, but there are no carbon-based organic compounds that can be electrocatalyzed by electrolysis of water

Method used

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  • Preparation method of quantum dot modified nanosheet composite material
  • Preparation method of quantum dot modified nanosheet composite material
  • Preparation method of quantum dot modified nanosheet composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Preparation of ferric oxide nanotubes: Weigh 1000 mg of anhydrous ferric chloride and 46 mg of ammonium dihydrogen phosphate, respectively, and disperse them in 20 mL of deionized water, and process with ultrasonic stirring. Measure 80 mL of deionized water and add 3 mL of trichloride in turn. Ferric chloride solution and 2mL ammonium dihydrogen phosphate solution were vigorously stirred and mixed, and the mixture was transferred to a reaction kettle. After the shell was packaged, it was transferred to an oven, kept at a constant temperature of 220°C for 30 hours, and cooled naturally. The obtained product was centrifugally washed, and then The product was dispersed into 20 mL of deionized water, and the resulting dispersion was subjected to freezing treatment, and finally transferred to a freeze dryer for freeze-drying to obtain ferric oxide nanotubes.

[0038](2) Preparation of nickel-cobalt hydroxide / ferric oxide nanotube composite material: Disperse 0.1 g of ferr...

Embodiment 2

[0042] (1) Preparation of ferric oxide nanotubes: Weigh 1622 mg of anhydrous ferric chloride and 46 mg of ammonium dihydrogen phosphate, respectively, and disperse them in 20 mL of deionized water. Water ferric chloride solution and 2.88mL ammonium dihydrogen phosphate solution were vigorously stirred and mixed, and the mixture was transferred to a reaction kettle. After the shell was packaged, it was transferred to an oven, kept at a constant temperature of 220°C for 36 hours, and cooled naturally. After centrifuging and washing, the product was dispersed into 20 mL of deionized water, and the resulting dispersion was subjected to freezing treatment, and finally transferred to a freeze dryer for freeze drying to obtain ferric oxide nanotubes.

[0043] (2) Preparation of nickel-cobalt hydroxide / ferric oxide nanotube composite material: disperse 0.05 g of ferric oxide nanotubes obtained in step (1) into 10 mL of deionized water for ultrasonic treatment, and weigh 365.4 mg of nic...

Embodiment 3

[0047] (1) Preparation of ferric oxide nanotubes: Weigh 1622 mg of anhydrous ferric chloride and 46 mg of ammonium dihydrogen phosphate, respectively, and disperse them in 20 mL of deionized water. Ferric chloride solution and 2.88mL ammonium dihydrogen phosphate solution were vigorously stirred and mixed, and the mixture was transferred to a reaction kettle. After the shell was packaged, it was transferred to an oven, kept at a constant temperature of 220°C, kept for 48 hours, and the obtained product was centrifugally washed by natural cooling. Afterwards, the product was dispersed into 20 mL of deionized water, and the resulting dispersion was subjected to freezing treatment, and finally transferred to a freeze dryer for freeze drying to obtain ferric oxide nanotubes.

[0048] (2) Preparation of nickel-cobalt hydroxide / ferric oxide nanotube composite material: disperse 0.05 g of ferric oxide obtained in step (1) into 10 mL of deionized water for ultrasonic treatment, weigh 1...

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Abstract

According to the invention, an iron-based compound composite material with a multilevel structure is constructed through interface engineering, and the composite material is a layered nickel-cobalt hydroxide/iron oxide nanotube modified by molybdenum disulfide quantum dots. The preparation method comprises the following steps: preparing a three-dimensional iron oxide nanotube, growing nickel-cobalt layered double hydroxide (NiCo-LDH) on the surface of iron oxide through a hydrothermal reaction to obtain a layered double hydroxide (LDH) ultrathin nanosheet and iron oxide nanotube composite material, mixing the composite material with molybdenum disulfide quantum dots according to a certain ratio, and carrying out hydrothermal reaction to obtain the composite material. The molybdenum disulfide quantum dot modified layered nickel-cobalt hydroxide/ferric oxide nanotube composite material is obtained. The unique lamellar structure exposes more catalytic active sites in contact with electrolyte, so that the material has higher oxygen evolution (OER) catalytic activity, meanwhile, the appearance of an interface promotes electron transfer, and the oxygen evolution performance of the compound is improved. The preparation method has the advantages of simple equipment, easiness in realization and control, good process repeatability, stable product quality and the like, and has a wide application prospect.

Description

technical field [0001] The invention belongs to the field of catalysis, and relates to a method for preparing a layered nickel-cobalt hydroxide / iron oxide nanotube composite material modified by molybdenum disulfide quantum dots. Background technique [0002] With the large-scale application of renewable energy technology, the importance of hydrogen energy storage technology based on electrolysis of water to produce hydrogen has become increasingly prominent in the power industry, and has broad application prospects in multiple scenarios. Electrolyzed water generally consists of two half-reactions, oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), but the yield of electrolyzed water is low, and high-performance and stable catalysts are required to participate. At present, oxygen evolution materials with excellent performance include ruthenium-based and iridium-based materials. Platinum-based materials are excellent hydrogen evolution materials. However, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051B01J35/00C07D307/68C25B1/04C25B11/091
CPCB01J27/0515B01J35/0033C25B11/091C25B1/04C07D307/68Y02E60/36
Inventor 郑金龙郝菊任显卓吕超杰吴凯利陈媛媛武继文
Owner SHUNDE GRADUATE SCHOOL UNIV OF SCI & TECH BEIJING
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