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Coal ash microsphere loaded one-dimensional nanometer titanium dioxide (TiO2) composite photocatalyst and preparation method thereof

A technology of nano-titanium dioxide and fly ash microbeads, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc. It can solve the problems of difficult powder, difficult liquid medium separation, and limited practical application. Achieve easy recycling, reduce agglomeration effect, and improve recycling performance

Inactive Publication Date: 2013-01-16
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nano-TiO 2 The powder photocatalyst must be uniformly dispersed in the liquid medium during the reaction process of degrading water pollutants, which is generally achieved by stirring, but after the reaction, the nano-TiO 2 The powder is difficult to settle freely, and it is very difficult to separate from the liquid medium. This shortcoming greatly limits its practical application.

Method used

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  • Coal ash microsphere loaded one-dimensional nanometer titanium dioxide (TiO2) composite photocatalyst and preparation method thereof
  • Coal ash microsphere loaded one-dimensional nanometer titanium dioxide (TiO2) composite photocatalyst and preparation method thereof
  • Coal ash microsphere loaded one-dimensional nanometer titanium dioxide (TiO2) composite photocatalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] 1. Wash the fly ash microbeads 3 times with distilled water to remove impurities, and then dry them at 60°C for use.

[0031] 2. Get 5g of cleaned fly ash microbeads and place them in a beaker, add 100mL of distilled water, take a water bath at 85°C, and control the mechanical stirrer at 350 rpm to stir evenly to obtain a microbead suspension.

[0032] 3. Prepare 250mL of 0.1mol / L TiCl in an ice-water bath 4 solution; adjust microbead suspension pH to be 2.5, add 40g urea as slow-release precipitating agent, the TiCl 4 The solution was added dropwise into the continuously stirring microbead suspension at a rate of 1mL / min. After the dropwise addition was completed, continue to stir at 85°C for 30min, filter with suction, wash repeatedly with distilled water and ethanol, dry at 75°C, and then dry at 400°C. Calcined for 2 hours, the nano-TiO 2 / fly ash microbeads composite photocatalytic material.

[0033] 4. Weigh 0.5g nano-TiO 2 / The fly ash microbead composite pho...

Embodiment 2

[0035] 1. Use distilled water to wash the fly ash microbeads 3 times to remove impurities therein, then dry at 60°C to obtain the cleaned fly ash microbeads.

[0036] 2. Get 5g of cleaned fly ash microbeads and place them in a beaker, add 100mL of distilled water, take a water bath at 85°C, and stir with a mechanical stirrer controlled at 350 rpm to obtain a microbead suspension.

[0037] 3. Prepare 250mL of 0.1mol / L TiCl in an ice-water bath 4 solution; adjust microbead suspension pH to be 2.5, add 40g urea as slow-release precipitating agent, the TiCl 4 Add the solution dropwise into the continuously stirring microbead suspension at a rate of 2mL / min. After the dropwise addition, continue to heat and stir for 30min, filter with suction, wash repeatedly with distilled water and ethanol, dry at 75°C, and then calcinate at 400°C for 2h , that is, the nano-TiO 2 / fly ash microbeads composite photocatalytic material.

[0038] 4. Weigh 0.5g nano-TiO 2 / The fly ash microbead ...

Embodiment 3

[0040] 1. Use distilled water to wash the fly ash microbeads 3 times to remove impurities therein, then dry at 60°C to obtain the cleaned fly ash microbeads.

[0041] 2. Get 5g of cleaned fly ash microbeads and place them in a beaker, add 100mL of distilled water, take a water bath at 85°C, and stir with a mechanical stirrer controlled at 350 rpm to obtain a microbead suspension.

[0042] 3. Prepare 250mL of 0.1mol / L TiCl in an ice-water bath 4 solution; adjust microbead suspension pH to be 2.5, add 40g urea as slow-release precipitating agent, the TiCl 4 Add the solution dropwise into the continuously stirring microbead suspension at a rate of 1mL / min. After the dropwise addition, continue to heat and stir for 30min, filter with suction, wash repeatedly with distilled water and ethanol, dry at 75°C, and then calcinate at 400°C for 2h , that is, the nano-TiO 2 / fly ash microbeads composite photocatalytic material.

[0043] 4. Weigh 0.5g nano-TiO 2 / The fly ash microbead ...

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Abstract

The invention discloses coal ash microsphere loaded one-dimensional nanometer titanium dioxide (TiO2) composite photocatalyst and a preparation method thereof. The coal ash microsphere loaded one-dimensional nanometer TiO2 composite photocatalyst consists of a coal ash microsphere and a one-dimensional nanometer TiO2 film covered on the surface of the coal ash microsphere, wherein the coal ash microsphere is in a thin-wall hollow structure; the external diameter of the coal ash microsphere is 100-200 micrometers; the thickness of the wall is 2-6 micrometers; the thickness of the one-dimensional nanometer TiO2 film is about 0.5-3 micrometers; and the TiO2 is in the one-dimensional nanometer structure. The composite photocatalyst disclosed by the invention is easy to disperse, recover and use in liquid medium, has a higher reaction activity and has a wide application prospect on the water body purification aspect, and a purpose of effectively removing organic pollutants in the water body can be achieved.

Description

1. Technical field [0001] The invention relates to the technical field of inorganic nanometer materials, in particular to a fly ash microbead-loaded one-dimensional nano titanium dioxide composite photocatalyst and a preparation method thereof. 2. Background technology [0002] With the rapid development of global industrialization, while people enjoy the comfortable life brought by scientific and technological achievements, the worsening environmental pollution also follows. Air pollution, industrial waste water, etc. have made people's living environment worse and worse. The animals and plants on the earth are on the verge of extinction. Environmental and ecological protection issues have been put on the agenda and are gradually becoming the focus and topic of people's attention. High-temperature incineration, physical adsorption, chemical oxidation and microbial treatment are currently the most commonly used representative pollution treatment methods. Although these metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J35/08B01J37/10C02F1/30
Inventor 吕珺徐光青郭凌坤吴玉程郑治祥
Owner HEFEI UNIV OF TECH
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