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Organic clay loaded with nanometer anatase type titanium dioxide and its preparation method and use

A technology of titanium dioxide and nano-anatase, which is applied in chemical instruments and methods, catalyst activation/preparation, catalyst carrier and other directions, can solve the problems of inability to disperse titanium dioxide, reduce surface area, increase particle size, etc., and achieves low price and adsorption. Strong, highly dispersive effect

Inactive Publication Date: 2007-07-18
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method cannot really disperse titanium dioxide, and it will also cause sintering of titanium dioxide during high-temperature roasting, which will increase the particle size and reduce the surface area.

Method used

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  • Organic clay loaded with nanometer anatase type titanium dioxide and its preparation method and use
  • Organic clay loaded with nanometer anatase type titanium dioxide and its preparation method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Organic modification of clay: 5g montmorillonite was dispersed in 500ml deionized water to form a stable suspension. Weigh 1.64g of cetyltrimethylammonium bromide and add it to the montmorillonite suspension and stir to dissolve at 80°C.

[0037] Titanium precursor alcohol solution was hydrolyzed under acidic conditions: 17ml of tetra-n-butyl titanate was dissolved in 34ml of ethanol, slowly added to 250ml of HCl solution with a molar concentration of 1mol / L, and vigorously stirred at 25°C until a transparent solution was formed.

[0038] Loading of nano-titanium dioxide on organoclay: add the prepared transparent solution dropwise to the suspension of montmorillonite, and stir at 80° C. for 10 h. Filter with suction and wash with water until the pH of the filtrate is 6-7. The solid is separated, vacuum-dried at 100° C., and ground into powder to obtain an organic montmorillonite loaded with nano-anatase titanium dioxide particles distributed in the middle of the organ...

Embodiment 2

[0040] Organic modification of clay: 5g montmorillonite was dispersed in 500ml deionized water to form a stable suspension. Weigh 2.64 g of dioctadecyl dimethyl ammonium chloride and add to the montmorillonite suspension at 80° C. and stir to dissolve.

[0041] The titanium precursor alcohol solution is hydrolyzed under acidic conditions: 17ml of tetra-n-butyl titanate is dissolved in 34ml of ethanol, and slowly added to 250ml of H with a molar concentration of 1mol / L 3 PO 4 In the solution, stir vigorously at 25°C until a transparent solution is formed.

[0042] Loading of nano-titanium dioxide on organoclay: add the prepared transparent solution dropwise to the suspension of montmorillonite, and stir at 80° C. for 10 h. Suction filter and wash with water until the pH of the filtrate is 6-7. The solid is separated, vacuum-dried at 100° C., and ground into powder to obtain an organic montmorillonite loaded with nano-anatase titanium dioxide particles distributed in the midd...

Embodiment 3

[0044] Organic modification of clay: 5 g of vermiculite was dispersed in 500 ml of deionized water to form a stable suspension. Weigh 1.70 g of cetyltrimethylammonium chloride and add it to the vermiculite suspension and stir to dissolve at 80°C.

[0045] Titanium precursor alcohol solution is hydrolyzed under acidic conditions: 14.2ml of tetraisopropyl titanate is dissolved in 28.4ml of ethanol, slowly added to 250ml of HCl solution with a molar concentration of 1mol / L, and stirred vigorously at 25°C until a transparent solution is formed .

[0046] Loading of nano-titanium dioxide on organoclay: add the prepared transparent solution dropwise to the vermiculite suspension, and stir at 80° C. for 10 h. Filter with suction and wash with water until the pH of the filtrate is 6-7. The solid is separated, vacuum-dried at 100° C., and ground into powder to obtain organic vermiculite loaded with nano-anatase titanium dioxide particles distributed in the middle of the organoclay sh...

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Abstract

A organic clay carrying nano-class anatase-type TiO2 is prepared from clay through modifying it by long-chain alkyl ammonium salt and carrying the anatase-type TiO2 nanoparticles by sol-gel method. It can be used as a photocatalyst for photodecomposing the organic pollutant in sewage or photodegradating polymer.

Description

technical field [0001] The invention relates to an organoclay loaded with nano anatase titanium dioxide and a preparation method thereof, and the use of the organoclay in photodecomposition of organic pollutants in water and photodegradation of polymers. Background technique [0002] Titanium dioxide has been widely used as a photocatalyst due to its high photocatalytic activity, stable chemical properties and environmental friendliness. Titanium dioxide generally has three crystal forms: anatase, rutile and brookite. Among them, the anatase type can absorb ultraviolet light with a wavelength less than 380nm due to its strong ability to absorb oxygen and a wide energy band gap (3.2eV), and has excellent photocatalytic activity. [0003] The photocatalytic activity of titanium dioxide is closely related to the grain size, and the particle size determines the efficiency of photoinduced electron / hole pair recombination and transfer to the substrate. When the particle size of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J32/00B01J37/00C02F1/30
Inventor 阳明书孟祥福张世民
Owner INST OF CHEM CHINESE ACAD OF SCI
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