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Alumina microsphere air purifying agent, preparation method and application of air purifying agent

An air purifier, alumina technology, applied in the field of air purification, can solve the problems of cumbersome and delicate operation and modification process, inability to realize industrialization, marketization, poor stability, etc., and achieve stable photocatalytic activity and excellent photocatalysis performance, the effect of good performance stability

Inactive Publication Date: 2014-08-27
青岛信锐德科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Although people have made a lot of efforts, these processing methods are either too complicated to be applied on a large scale; or the cost is too high to stay in the laboratory stage, and it is impossible to achieve industrialization and marketization; or although it has been demonstrated to a certain extent Modification, but the stability is poor, and after a period of time, it is prone to agglomeration and significantly reduces its photocatalytic performance; or these modifications involve chemical modification, and the operation and modification process are too cumbersome and delicate, resulting in the processing methods Very limited and very tightly controlled conditions
[0011] In addition, although alumina is a well-known adsorption material, so far, there is no prior art that combines alumina microspheres and titanium dioxide organically.
All these, although there are certain advantages in the technical improvements disclosed above, there are still disadvantages such as complicated operation and poor stability of the photocatalytic performance of the product. There is still an urgent need for industrially produced air purifiers

Method used

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  • Alumina microsphere air purifying agent, preparation method and application of air purifying agent
  • Alumina microsphere air purifying agent, preparation method and application of air purifying agent

Examples

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preparation example Construction

[0048] Preparation of alumina microspheres

[0049] The cleaned aluminum balls were annealed in a vacuum furnace at 600°C for 2h to eliminate the mechanical stress therein. Then, adopt the mixed acid solution of 5wt% phosphoric acid and 0.4mol / L oxalic acid (volume ratio 1: 1) to form as electrolytic solution, with aluminum ball as anode, stainless steel plate as cathode, 90V DC voltage anodic primary oxidation 5h under 5 ℃, then Take it out, put it into a solution of phosphochromic acid (a mixed solution containing 10wt% of phosphoric acid and 3wt% of chromic acid) to wash away the irregular holes generated by the primary oxidation. Then, under the same conditions, it was anodized twice for 20 hours to obtain porous alumina microspheres with regular pores, the diameter of which was 80nm.

[0050] By changing the oxidation conditions, alumina microspheres with a wide range of pore diameters such as 40-250nm can be obtained.

Embodiment 1

[0052] (1). Add 0.3mol analytically pure TiCl 4 Add dropwise deionized water to prepare a transparent aqueous solution with a mass concentration of 35%, and then add an aqueous sodium carbonate solution with a mass concentration of 40% to obtain TiO 2 Precipitate, this precipitate carries out high-speed shear (5000rpm / min) in dehydrated alcohol, and shearing time is 50 minutes, obtains stable suspension, TiO 2 The particle size is 20nm;

[0053] (2). Add 0.1mol silver sulfate to the solution of step (1), and use ultrasonic vibration to make it completely mixed until a uniform and transparent sol is formed;

[0054] (3). Immerse 0.3mol alumina microspheres with a channel diameter of 80nm in the sol of step (2), and perform ultrasonic oscillation for 30 minutes, and then dry naturally;

[0055] (4). Calcining the dried alumina microspheres in step (3) in a muffle furnace, first calcining at 250°C for 1.5 hours, and then increasing the temperature at a heating rate of 150°C / h t...

Embodiment 2

[0058] Except that the aperture of alumina microspheres is 100nm, this embodiment is implemented in the same manner as in Example 1, and the nano-TiO of final alumina microsphere air purifier material 2 The ratio of particle diameter to alumina microsphere diameter is 1:5.

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Abstract

The invention relates to an alumina microsphere air purifying agent material, a preparation method and an application of the air purifying agent material. Micropores of an alumina microsphere are doped with nano TiO2 particulates and mixed with a certain amount of Ag ions. The alumina microsphere air purifying agent material has excellent photocatalysis properties under sunlight and ultraviolet irradiation conditions, can efficiently and rapidly decompose multiple organic pollutants in the air, in particular indoors, has good property stability, and can be used for indoor air purifying.

Description

technical field [0001] The invention relates to an air purifier material, in particular to an alumina microsphere air purifier material, a preparation method and an application thereof. It belongs to the field of air purification. Background technique [0002] On a global scale, since the industrialization revolution, with the rapid development of the petrochemical industry and the development of the fuel-consuming automobile industry, environmental pollution has become increasingly aggravated, and a large amount of exhaust gas from motor vehicles has caused great harm to people's travel and atmospheric environment. have caused serious negative effects. [0003] In addition, while human beings enjoy the fruits of scientific and technological progress and development, they also have to bear the negative effects of the resulting double-edged sword. At the same time, due to the application of a large number of chemical raw materials, decorative materials, and daily chemical p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/50B01D53/86B01D53/72B01D53/58B01D53/56B01D53/52
Inventor 姚素梅刘永春
Owner 青岛信锐德科技有限公司