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Low-temperature preparation method of nonalcoholic visible light photocatalysis nano-dispersion

A nano-dispersion liquid and visible light technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc. Problems such as the use of photocatalysts, to achieve the effect of reducing production costs and improving safety

Inactive Publication Date: 2017-01-11
江苏康润净化科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the titanium content of the photocatalytic dispersion suitable for spraying is relatively high, such as 1%, white spots will be formed on the dark substrate, which will affect the visual experience of the substrate
[0008] In addition, the photocatalyst base liquid prepared by hydrolysis of organic titanium source can only produce a strong response under ultraviolet light to generate hydroxyl radicals to remove pollution; but it is difficult to work under visible light, especially weak visible light, greatly Limits the use of such photocatalysts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Add an appropriate amount of 37% hydrochloric acid solution to 100mL distilled water to prepare a hydrochloric acid solution with pH=1. Then add 0.065g of zinc chloride and stir vigorously for 2h. Directly add 10 mL of tetraethyl titanate and 0.002 g of tetraammine platinum dichloride, stir vigorously for 0.5 h, and process it with a circulating nano colloid mill. Add 0.004 g of P25, and treat the resulting liquid with a rotary evaporator under normal pressure for 8 h at 65 ° C. Evaporate the aforementioned titanium-containing solution to 70 mL in a rotary evaporator. Add distilled water to bring the volume up to 800 mL and adjust the pH to 4. Finally, 1 mL of sodium dodecylbenzenesulfonate was added. Get liquid A.

Embodiment 2

[0031] Add an appropriate amount of 65% nitric acid solution to 250mL distilled water to prepare a nitric acid solution with pH=1. Then add 0.027g of copper nitrate and stir vigorously for 1h. Directly add 20mL of tetra-n-propyl titanate and 0.003g of cobalt acetate, stir vigorously for 0.5h, and process with circulating nano colloid mill. Add 0.003 g of P25, and treat the resulting liquid with a rotary evaporator under normal pressure for 9 h at 70 ° C. Evaporate the aforementioned titanium-containing solution to 200 mL in a rotary evaporator. Add distilled water to bring the volume up to 2000 mL and adjust the pH to 4.5. Finally, 2 mL of Triton X-100 was added. Obtain liquid B.

Embodiment 3

[0033] Add an appropriate amount of 85% phosphoric acid solution to 500mL distilled water to prepare a phosphoric acid solution with pH=1. Then add 0.24g of silver nitrate and stir vigorously for 1h. Directly add 25mL of tetrabutyl titanate and 0.003g of nickel nitrate, stir vigorously for 0.5h, and process with circulating nano colloid mill. Add 0.006 g of P25, and treat the resulting liquid with a rotary evaporator under normal pressure for 6 h at 60 ° C. Evaporate the aforementioned titanium-containing solution to 400 mL in a rotary evaporator. Add distilled water to bring the volume up to 4000 mL and adjust the pH to 5. Finally, 4 mL of dioctadecylamine hydrochloride was added. Get liquid C.

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Abstract

The invention relates to a low-temperature preparation method of a nonalcoholic visible light photocatalysis nano-dispersion, and belongs to the field of production of visible light photocatalytic indoor air purification products. The nano-dispersion is suitable for being supported on a cloth substrate in vehicles in a spray mode. The method comprises the following steps: constructing an acidic aqueous solution with the pH value of 1, adding a soluble antibacterial component, directly adding an organic titanium precursor and a visible light photocatalysis component, cycling nano-colloid mill cooperated hydrolysis, adding initiation crystals, carrying out normal pressure heating in a rotary evaporator, carrying out reduced pressure rotary evaporation, diluting, adjusting the obtained diluted solution to be weakly acidic, and adding a surfactant. The dispersion prepared by using the rotary evaporator has no peculiar smell and is suitable for being used as a fragrant photocatalysis product base liquid, cooperation of the colloid mill with hydrolysis makes the method be suitable for industrialization, the low-temperature preparation mode reduces the cost, the dilution step improves the use safety, no white black spots are formed in the spraying process, and the added visible photocatalysis component makes the dispersion has visible light response.

Description

technical field [0001] The invention relates to a low-temperature preparation method of an alcohol-free visible light photocatalytic nano-dispersion liquid, which is suitable for the field of preparation of visible light photocatalytic indoor air purification products, and is especially suitable for a cloth substrate loaded inside a vehicle by spraying. Background technique [0002] Photocatalysis is a green technology with important application prospects in the environmental field. It provides a new solution for air purification and water purification. At present, Europe, America and Japan have developed a variety of relatively mature photocatalytic purification products, such as the Hydrotect series products suitable for air purification developed by Japan Toto Machinery Co., Ltd. Research Institute, and the LiquidLens™ UPW developed by Entegris Ultrapure Water Company in the United States Water purification system, etc. [0003] The preparation of photocatalyst is the ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38B01J35/12B01J35/27
Inventor 冯冠华仇健
Owner 江苏康润净化科技有限公司
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