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Iron phosphate-wrapped photocatalytic nano titanium dioxide powder and application thereof

A nano-titanium dioxide, titanium dioxide technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes and other directions, can solve problems such as large limitations, and achieve the effects of easy mixing, wide application and convenient use

Inactive Publication Date: 2014-02-05
SKSHU PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of photocatalytic powder only involves calcium salt coating, and for some systems that are not suitable for calcium salt, the limitations must be relatively large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1: Pour 100g of titanium dioxide (P25-a highly dispersed titanium dioxide produced by AEROSIL200 process, with an average particle size of 21nm) into 200mL of water and add Na 2 CO 3 Control the pH value to 8.0, and add 2g of polyvinylpyrrolidone (PVP - from Sinopharm, China), and fully shake to disperse.

[0040] Dissolve 200g of ferric nitrate tetrahydrate and 400g of ammonium dihydrogen phosphate in 500mL of distilled water, stir evenly, add 5g of polyvinylpyrrolidone (PVP), and ultrasonically oscillate; then add the obtained titanium dioxide solution and mix, adjust the pH value to 8.0 with lye, Stir and heat to obtain a gel; after drying and grinding the gel, under the protection of a nitrogen atmosphere, it is pyrolyzed at 400°C for 2 hours and then calcined at 500°C.

[0041] Using the liquid acetaldehyde method as a degradation marker, the performance of photocatalytic degradation of small molecule pollutants of photocatalytic nano-titanium dioxide powd...

Embodiment 2

[0045] Example 2: By implementing the same procedure as in Example 1, the difference is that sodium hexametaphosphate (Sinopharm) is used as an anionic surfactant, and all other conditions remain the same, and a light yellow powder for photocatalysis is obtained. The obtained photocatalytic powder can completely degrade acetaldehyde in 2 hours, and methyl orange becomes colorless at the same time.

[0046] It is mixed and extruded with the plastic component polyethylene terephthalate resin to obtain a strip containing 30% photocatalytic powder, which is irradiated with an ultraviolet lamp, and the resin will not change color or age for a day. It is used in the water-soluble aldol resin solution (produced by Dow) in the coating system to make a coating system containing 30% photocatalytic powder. It is irradiated with a 246nm ultraviolet lamp, and the resin will not change color or age after one day.

Embodiment 3

[0047] Example 3: By implementing the same procedures as in Example 1, except that 15nm titanium dioxide (provided by Fuzhou University) particles were used, and all other conditions remained the same, a photocatalytic powder was obtained. The obtained photocatalytic powder is used to degrade acetaldehyde or methyl orange. The measurement results show that the synthesized photocatalytic powder can completely degrade acetaldehyde within 2 hours, and methyl orange becomes colorless at the same time.

[0048] It is mixed and extruded with the plastic component polyethylene terephthalate resin to obtain a strip containing 30% photocatalytic powder, which is irradiated with a 246nm ultraviolet lamp, and the resin will change color and age within one day. It is used in the water-soluble aldol resin solution (manufactured by Dow) in the coating system to make a coating system containing 30% photocatalytic powder. It is irradiated with 246nm ultraviolet lamp, and the resin will not cha...

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PUM

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Abstract

The invention provides photocatalytic yellow powder capable of being applied to environment purifying. Each titanium dioxide particle is wrapped by iron phosphate particles, and the degrading function of the titanium dioxide to a macromolecule organic matter is selectively shielded or weakened. The photocatalytic solid powder can be extensively applied to various organic polymer setting products, especially organic fibers or plastic products or colored paint.

Description

technical field [0001] The invention relates to a photocatalytic powder applicable to environmental purification and a production method thereof. The powder can be used to remove odors, harmful substances or pollutants in the air, especially small molecular substances such as benzene and formaldehyde; the powder At the same time, it can be used in drainage or water purification to remove harmful substances and bacteria in water. The powder is particularly suitable for incorporation into organic fibers or plastics by various physical means such as kneading or embedding or mixing etc. Background technique [0002] Air pollution has become an environmental problem that is widely concerned by countries all over the world. The main pollutants are sulfides, nitrogen oxides, formaldehyde and benzene and other volatile organic compounds. The methods of pollution control are summarized as follows: adsorption method, ozone purification method, chemical reaction method, plant purifica...

Claims

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Application Information

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IPC IPC(8): B01J27/185B01D53/86C02F1/30C02F1/32C08L67/02C08K9/10C09D7/12
Inventor 洪杰胡必忠刘晓彬
Owner SKSHU PAINT
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