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A kind of titanium oxide photocatalyst and preparation method thereof

A technology of photocatalyst and titanium oxide, which is applied in the field of photocatalysis, can solve the problems of limited application and unsatisfactory photocatalytic effect, and achieve the effect of improving catalytic effect, simple and easy synthesis process, and broad application prospects

Active Publication Date: 2017-05-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this material has a rich pore structure, in the actual application process, the photocatalytic effect is always not ideal, which greatly limits the performance of TiO2. 2 - Application of mesoporous polyvinylbenzene in the degradation of pollutants

Method used

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  • A kind of titanium oxide photocatalyst and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 4.0g of divinylbenzene monomer to a mixed solvent of 15g of acetone, methanol and dimethylformamide (the volume ratio of the three is 50:20:30), add 0.05g of 2,2-azobisnitrile pentyl Acid initiator (1% of the mass of divinylbenzene), then add 1.4g of titanium tetrachloride, stir at room temperature for 60min, put it into a hydrothermal synthesis reactor; polymerize at 180°C for 24h, and obtain a massive composite solid. Open the hydrothermal synthesis reaction kettle, add 0.0015mol / L sulfuric acid solution, the volume added is twice the volume of the mixed solvent of acetone, methanol and dimethylformamide, hydrothermal treatment at 240°C for 36h, after the reaction stops, take out the solid sample, put Put into vacuum heating (80 ℃) dry 10h, remove the organic solvent, can obtain blocky polymer material, wherein the mass fraction of titanium dioxide is 13%, its measured specific surface area is 423 m 2 / g, the pore size is about 35 nanometers, and the XRD test show...

Embodiment 2

[0022] Prepared according to the method in Embodiment 1, only changing the ratio of the solvents acetone, methanol and dimethylformamide (the volume ratio of the three is 45:35:20); a blocky polymer material can be obtained, wherein the mass fraction of titanium dioxide is 13 %, the measured specific surface area is 355 m 2 / g, the pore diameter is about 21 nanometers, and the XRD test shows that the ratio of the two crystal forms of rutile and anatase is about 2:3. According to embodiment 1, put the sample in 50 mg / L rhodamine B solution, and after irradiating for 2 hours under a 500W xenon lamp, the COD value of the rhodamine B solution is 18 mg / L.

Embodiment 3

[0024] Prepared according to the method in Embodiment 1, only changing the ratio of the solvents acetone, methanol and dimethylformamide (the volume ratio of the three is 40:35:25); a blocky polymer material can be obtained, in which the mass fraction of titanium dioxide is 13 %, the measured specific surface area is 449 m 2 / g, the pore diameter is about 21 nanometers, and the XRD test shows that the ratio of the two crystal forms of rutile and anatase is about 1:3. Take 50mg of the sample, put it into 2ml of 50mg / L Rhodamine B solution, and irradiate it under a 500W xenon lamp for 2h, the COD value of Rhodamine B solution will drop to 5 mg / L.

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Abstract

The invention discloses a preparation method of a titanium oxide photocatalyst. The method comprises the following steps: 1, adding a divinyl benzene monomer, an initiator and a titanium compound to an organic solvent, stirring for 30-90min, adding the obtained mixture to a hydrothermal synthesis reaction kettle, and carrying out a polymerization reaction at 140-180DEG C for 24-36h; 2, opening the hydrothermal synthesis reaction kettle after the polymerization reaction carried out in step 1, adding an acidic solution, and carrying out heat treatment at 200-300DEG C for 24-48h; and 3, taking out the obtained compound solid after the heat treatment carried out in step 2, and drying the compound solid to obtain the TiO2-mesoporous polydivinyl benzene photocatalyst. The pollutant degradation effect of the TiO2-mesoporous polydivinyl benzene photocatalyst prepared through the method is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a highly active titanium oxide photocatalyst and a preparation method thereof. Background technique [0002] As a new advanced oxidation technology, photocatalytic oxidation has become the frontier field and research hotspot of environmental governance. The use of photocatalytic oxidation is expected to achieve deep mineralization of organic matter. TiO 2 is the most commonly used photocatalyst, TiO 2 There are two types in the reactor: suspension type and load type. The suspension type has the characteristics of good dispersion, large specific surface area and high reaction efficiency. Especially nano TiO 2 , not only has a large specific surface area, but also its unique scale effect is of great benefit to wastewater degradation. Although the suspended TiO 2 It has a high degradation efficiency, but it is difficult to separate after the reaction, which...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/38B01J35/10
Inventor 李建涛张鹏李宝忠刘忠生郭宏山方向晨
Owner CHINA PETROLEUM & CHEM CORP
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