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Method for preparing metal base nano oxide net

A nano-oxide, metal-based technology, applied in chemical instruments and methods, chemical/physical processes, catalyst activation/preparation, etc., can solve the problems of incomplete diffusion and illumination, large particles, difficult practical application of nano-oxides, etc. Achieve the effect of convenient and simple implementation, short time period and easy external regulation

Inactive Publication Date: 2002-06-19
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large size of the catalysts, there are problems of diffusion and incomplete illumination, while nanoscale semiconductor oxides show better catalytic performance.
However, discrete nano-oxides are difficult to apply in practice

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0028] Dilute 10mL of tetrabutyl titanate with 50mL of absolute ethanol, take 50mL of deionized water with a three-necked flask, and then add the diluted solution of tetrabutyl titanate to the deionized water at a rate of 1 drop per second while vigorously stirring to To prevent uneven precipitation, 1% by mass surfactant OP was added to the stock solution, and the precipitate was washed 2-3 times with 30 mL of ethanol after suction filtration. Add an appropriate amount of deionized water to the precipitate, and disperse it with ultrasonic waves for 0.5 hours to obtain a certain concentration of positively charged TiO on the surface. 2 Colloid (30nm). Before depositing zeolite, the surface of the stainless steel wire mesh is pretreated by immersing the wire mesh in a polyanionic electrolyte solution with a concentration of 0.5% for 20 minutes, and then washing it with distilled water for 4 times, so that the surface of the stainless steel wire mesh is negatively charged, and t...

example 2-4

[0030] Carry out layer-by-layer experiment by the method for example 1, but the method to stainless steel wire mesh pretreatment is different. Soak with 0.3% polycation electrolyte solution for 20 minutes after modification with PSS, then wash 4 times with distilled water, so use polyanion (or cation) ion electrolyte to adsorb alternately once, twice, three times, and make the outermost layer be PSS, stainless steel-based nano-TiO will be prepared after one, two, and three polyelectrolyte cycle modifications 2 net, denoted as A 2 , A 3 , A 4 .

example 5-7

[0032] Carry out layer-by-layer experiment with the same method as example 3, but to nanometer TiO 2 The mass percentage concentration of the colloidal solution is adjusted, respectively using 0.1%, 0.5%, and 6% nano-TiO 2 Glue; obtained stainless steel-based nano-TiO 2 net, denoted as A 5 , A 6 , A 7 .

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PUM

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Abstract

The present invention mainly relates to a method for preparing metal base oxide gauze by utilizing layered layer nano assembly technique. Said method uses the nano oxide glue as adsorption deposition liquor and uses metal gauze as matrix to assemble to assemble to nano oxide on the metal gauze by using layered layer method under the action of static attraction. If the altermative adsorption of different kinds of oxide colloids is utilzied, the heterocomplexed metal base oxide gauze can be obtained. The prepared lattice surface ultrathin oxide film can provide quick diffusion and high active position utilization rate. The high heat conductivity of metal basis is suitable for exothermal reaction, and its unique gauze structure more possesses superiority in mass transfer field, and is convenient for operation. Said invention method can be extensively used in catilisis, separation industry and environmental protection and preparation of sensor and modification of electrode.

Description

technical field [0001] The invention is a method for preparing a metal-based nano-oxide network by layer-by-layer technology. Background technique [0002] Nano-oxides, especially semiconductor nano-oxides, have attracted extensive research interest due to their unique and superior properties. For example, the magnetism of ferroferric oxide, a magnetic material, changes at the nanometer scale. Titanium dioxide and zinc oxide with photocatalytic activity have the best activity at a certain nanoscale, and have outstanding advantages in water and gas purification, such as the decomposition of phenols in water, the decomposition of carcinogenic organic substances containing chlorine, the decomposition of freon in gas, and the decomposition of nitrogen-containing Compound decomposition, etc. However, due to the large particle size of the prepared catalyst, there are problems of diffusion and incomplete illumination, while nanoscale semiconductor oxides show better catalytic per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J35/04B01J37/02
Inventor 唐颐王星东王亚军董安钢
Owner FUDAN UNIV
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