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Nanometer iron-based particle as well as preparation method and application thereof

An iron-based, nanotechnology, applied in botany equipment and methods, applications, nanotechnology, etc., can solve the problems of toxic reducing agent sodium borohydride, harsh production environment, expensive equipment, etc., to improve the transfer path and reduce environmental hazards , the effect of reducing production costs

Pending Publication Date: 2022-03-18
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, there are many ways to prepare nano iron-based particles, but most of the methods are accompanied by expensive equipment and harsh production environment
The preparation of nano-iron-based particles by liquid phase reduction has the characteristics of low cost, small investment, and large output, but this method often involves an expensive and toxic reducing agent sodium borohydride, which makes this method not widely used

Method used

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Examples

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Comparison scheme
Effect test

preparation example Construction

[0022] A method for preparing nano-iron-based particles, comprising the steps of:

[0023] 1) Preparation of oxidation solution: Mix anaerobic distilled water and absolute ethanol at a volume ratio of 7:3 to 3:7 to obtain a hydroalcoholic solution; weigh a certain amount of ferrous chloride or ferrous sulfate, dissolve in water Alcoholic solution, control Fe 2+ The concentration of the hydroalcoholic solution is 0.3-0.7mol / L. Add a certain mass of citric acid under stirring conditions, the number of moles of which is Fe 2+ 1.3 times that of Fe 2+ complexes to obtain an oxidizing solution.

[0024] 2) Preparation of reducing solution: take by weighing sodium hydroxide, its molar number is Fe 2+ 5 times of that, configure it as a 1mol / L sodium hydroxide solution, a large amount of heat is released at this time, and a certain amount of low sulfite is added to it, the number of moles of which is Fe 2+ 1.5 times of that, control the water temperature at 50-70°C to prepare the ...

Embodiment 1

[0028] Mix anaerobic distilled water and absolute ethanol at a volume ratio of 6:4 to obtain a hydroalcoholic solution. Weigh 198.81gFeCl 2 4H 2 O was dissolved in 2L of the above hydroalcoholic solution. Add 250g of citric acid under stirring condition to make 0.5mol / L of Fe 2+ The hydroalcoholic solution of the complex is the oxidation solution. Weigh 200g of sodium hydroxide and dissolve it in 5L of distilled water, release a lot of heat, add 261.16g of sodium persulfite to it, and control the water temperature to 60°C to prepare a reducing solution. The reducing solution was also heated to 60°C, and the reducing solution was added to the oxidizing solution under stirring condition, and reacted for 30 minutes, the solution gradually turned gray-black, and at this time, sulfur-modified nano-iron-based particles were formed. After the reaction, stop heating, keep stirring, slowly add 40ml of 0.2mol / L silver nitrate solution into the reaction system, stop stirring after 20...

Embodiment 2

[0030] Mix oxygen-free distilled water and absolute ethanol at a volume ratio of 4:6 to obtain a hydroalcoholic solution. Weigh 16.68g FeSO 4 ·7H 2 O was dissolved in 100ml of the above hydroalcoholic solution. Add 15g of citric acid under stirring conditions to obtain 0.6mol / L of Fe 2+ The hydroalcoholic solution of the complex is the oxidation solution. Weigh 12g of sodium hydroxide and dissolve it in 300ml of distilled water to release a large amount of heat, add 18.57g of potassium subsulfite to it, and control the water temperature to 65°C to prepare a reducing solution. The reducing solution was also heated to 65 ° C, and the reducing solution was added to the oxidizing solution under stirring conditions, and the reaction was carried out for 30 minutes. The solution gradually turned gray-black, and at this time, sulfur-modified nano-iron-based particles were formed. After the reaction is over, stop heating, keep stirring, slowly add 2.5ml of 0.2mol / L silver nitrate s...

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Abstract

The invention belongs to the technical field of functional nano materials, and particularly relates to nano iron-based particles and a preparation method and application thereof.The preparation method comprises the steps that ferrous ions, citric acid, ethyl alcohol and anaerobic distilled water are used for preparing a water-alcohol solution of a Fe < 2 + > complex; then adding an alkaline solution of low sulfite into the water-alcohol solution to reduce iron ions into nanoscale zero-valent iron, and forming iron sulfide on the surface of the zero-valent iron to complete preparation of sulfur-modified nano-iron-based particles; and then a silver ion solution is added, silver ions are reduced into zero-valent silver by the zero-valent iron, the zero-valent silver is combined on the surfaces of the nano-iron-based particles, and the silver-sulfur modified nano-iron-based particles are obtained after filtering, washing and vacuum drying. According to the invention, the alkaline solution of low sulfite is used as a reducing agent, the Fe < 2 + > complex is used as a precursor, the generation of the nano zero-valent iron substrate and the modification of the sulfur on the surface of the nano zero-valent iron substrate are synchronously completed, the production cost is reduced, the environmental harm is reduced, and the reaction activity and the killing capability are improved.

Description

technical field [0001] The invention belongs to the technical field of functional nano-materials, and in particular relates to a nano-iron-based particle and a preparation method and application thereof. Background technique [0002] Medical sewage is mainly the sewage discharged from the hospital's consultation room, laboratory, ward, laundry room, X-ray photo room and operating room, etc. It contains a large number of pathogenic bacteria, viruses and chemical agents. The source and composition are very complex and have space pollution. , The characteristics of acute infection and latent infection. Traditional treatment methods such as membrane treatment, chlorine disinfection, ultraviolet light, and ozone often have high requirements for equipment, and the long-term sterilization effect is poor. Disinfection and drug degradation cannot be completed simultaneously, and may be accompanied by toxic by-products and safety issues. question. [0003] Nano-iron-based particles ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/06C02F1/50A01N59/16A01P1/00A01P3/00B22F1/054B82Y40/00
CPCB01J13/06C02F1/50A01N59/16B82Y40/00C02F2103/003C02F2305/08
Inventor 李灿华何川都刚朱伟长黄贞益李明晖马文青
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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