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Silver-carrying nanometer titanium dioxide and preparation method thereof

A nano-titanium dioxide and silver-carrying technology, applied in nanotechnology and other directions, can solve the problems of high local concentration, poor dispersion, uneven particle size and shape of materials, and achieve the effects of rapid material mixing, narrow size distribution, and uniform particles.

Active Publication Date: 2017-01-11
深圳市中科银康新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the liquid phase method causes the local concentration of the material to be too high, the particle size and shape are uneven, and the dispersion is poor.

Method used

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  • Silver-carrying nanometer titanium dioxide and preparation method thereof
  • Silver-carrying nanometer titanium dioxide and preparation method thereof
  • Silver-carrying nanometer titanium dioxide and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The invention discloses a preparation method of silver-loaded nano-titanium dioxide, which adopts an ultrasonic-assisted microfluidic method, through ultrasonic-assisted mixing and dispersion, and raw materials are mixed in a microchannel to form silver-loaded nano-titanium dioxide.

[0029] Specifically, the method uses silver nitrate solution (concentration is 0.6mmol / L) as material A, and adds surfactant (such as sodium citrate) and sodium hydroxide in sodium borohydride solution (concentration is 4mmol / L) as Material B, with titanium tetrachloride as material C, add surfactant (as polyethylene glycol) in ammoniacal liquor (concentration is 8wt%) as material D, the consumption of surfactant sodium citrate and polyethylene glycol is It is well known to those skilled in the art and will not be repeated here.

[0030] Such as figure 1 As shown, the material A, material B, material C, and material D are respectively pumped into the microfluidic chip through four pumps, ...

Embodiment 2

[0034] Carry out according to the method similar to embodiment 1, difference is, silver nitrate solution concentration is 1mmol / L, and sodium borohydride solution concentration is 9mmol / L, and ammoniacal liquor concentration is 10wt%, sodium borohydride, silver nitrate, sodium hydroxide The molar ratio is 1:3:6, the molar ratio of titanium tetrachloride and ammonia water is 1:5, the mass ratio of nano-silver and nano-titanium dioxide is 1:6, the reaction temperature is 98°C, and the reaction time is 10s.

Embodiment 3

[0036] Carry out according to the method similar to Example 1, difference is, silver nitrate solution concentration is 0.3mmol / L, and sodium borohydride solution concentration is 2mmol / L, and ammoniacal liquor concentration is 7wt%, sodium borohydride, silver nitrate, hydroxide The molar ratio of sodium is 1:6:3, the molar ratio of titanium tetrachloride and ammonia water is 1:3, the mass ratio of nano-silver and nano-titanium dioxide is 1:5, the reaction temperature is 40°C, and the reaction time is 60s.

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Abstract

The invention belongs to the field of environment materials, and discloses a silver-carrying nanometer titanium dioxide and a preparation method thereof. According to the preparation method, silver nitrate solution serves as a material A, surface active agents and sodium hydroxide serving as a material B are added into sodium borohydride solution, titanium tetrachloride serves as a material C, surface active agents serving as a material D are added into ammonia water, the material A, the material B, the material C and the material D are respectively pumped into a micro-fluidic chip, the material A and the material B react to obtain nanometer silver, the material C and the material D react to obtain nanometer titanium dioxide, and the nanometer silver and the nanometer titanium dioxide are mixed to obtain the silver-carrying nanometer titanium dioxide. The silver-carrying nanometer titanium dioxide is prepared by the aid of a ultrasonically assisted micro-fluidic liquid phase method, generation and aging of nanometer particles can be effectively facilitated, diameters and distribution of the nanometer particles are controlled, the silver-carrying nanometer titanium dioxide is small in photocatalyst particle diameter, uniform in particle and narrow in size distribution, and degradable functions and bactericidal performances of the silver-carrying nanometer titanium dioxide are superior to those of a similar product.

Description

technical field [0001] The invention belongs to the field of environmental materials, and in particular relates to a silver-loaded nano-titanium dioxide and a preparation method thereof. Background technique [0002] Nano-titanium dioxide is a photocatalyst with a strong ability to oxidize and decompose organic matter under light irradiation. It can effectively decompose various organic volatiles, kill bacteria and remove various odors. It is used to remove nitrogen oxides, Environmental protection fields such as water pollution treatment and antifouling and self-cleaning of building outer walls. Nano-titanium dioxide can only kill more than a dozen viruses and bacteria, and it can only achieve 90% of the effect. Nano silver can kill more than 600 kinds of germs, and can achieve more than 99% effect. The silver-loaded nano-titanium dioxide solution greatly improves the insufficiency of the nano-titanium dioxide in sterilization. The silver and titanium dioxide of commerci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y40/00
CPCB22F9/24B82Y40/00
Inventor 刘彬邓约章
Owner 深圳市中科银康新能源科技有限公司
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