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Preparation method of titanium dioxide-mesoporous polymer nanoporous composite visible light catalytic material

A nanoporous and titanium dioxide technology, applied in the field of material science, can solve the problems of poor thermal stability and unfavorable product separation, and achieve good adsorption performance, excellent visible light catalytic degradation ability, and excellent visible light catalytic degradation performance.

Inactive Publication Date: 2015-08-12
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Titanium dioxide catalytic materials doped with transition metals generally have relatively poor thermal stability, while titanium dioxide doped with non-metallic elements such as C, N, and S has better stability and visible light catalytic performance. However, the introduction of conventional heteroatoms Generally, very harsh high-temperature treatment conditions (>400°C) are required. At the same time, the particle size of nano-titanium dioxide series catalytic materials obtained after doping is small, generally nano-sized, which is not conducive to separation from the product during the reaction process. The above shortcomings limit the visible light of titanium dioxide. Wide range of applications of catalytic materials

Method used

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  • Preparation method of titanium dioxide-mesoporous polymer nanoporous composite visible light catalytic material
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  • Preparation method of titanium dioxide-mesoporous polymer nanoporous composite visible light catalytic material

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Embodiment 1

[0034] Firstly, titanium dioxide-mesoporous polymer nanoporous composite visible light catalytic material, namely PDVB-VI-TiO, was synthesized by using ethyl acetate solvent and imidazole as functional monomers. 2 - xs (where xs represents the molar ratio of titanium species to imidazole in the material).

[0035] Add 2.0g DVB, 0.72g 1-vinylimidazole (VI) to the mixed solution containing 0.065g AIBN and 25mL ethyl acetate, then add 2.5mL n-butyl titanate (TBOT), stir at room temperature for 3 hours, 100℃ After hydrothermal treatment for 24h, a brownish-yellow blocky solid was obtained. In order to fully crystallize the titanium dioxide in the material, open the lid of the reactor after hydrothermal treatment, add 2-3mL of water, continue the hydrothermal treatment at 160°C for 24 hours, take it out, open the lid, and volatilize the solvent to obtain PDVB-VI-TiO 2 -0.92. During the synthesis process, DVB / AIBN / VI / TBOT / ethyl acetate (molar ratio) was 1 / 0.026 / 0.5 / 0.46 / 16.7.

Embodiment 2

[0037] Titanium dioxide-mesoporous polymer nanoporous composite visible light catalytic materials were synthesized with ethyl acetate solvent and imidazole as functional monomers, and the content of titanium species in the materials was adjusted.

[0038] Add 2.0g DVB, 0.72g 1-vinylimidazole (VI) to the mixed solution containing 0.065g AIBN and 25mL ethyl acetate, then add 1.25mL n-butyl titanate (TBOT), stir at room temperature for 3 hours, 100℃ After hydrothermal treatment for 24 hours, a brownish-yellow blocky solid was obtained. In order to fully crystallize the titanium dioxide in the material, open the lid of the reactor after hydrothermal treatment, add 2-3mL of water, continue the hydrothermal treatment at 150°C for 24 hours, take it out, and open the lid. The solvent is volatilized to obtain PDVB-VI-TiO 2-0.46. During the synthesis process, DVB / AIBN / VI / TBOT / ethyl acetate (molar ratio) was 1 / 0.026 / 0.5 / 0.23 / 16.7.

Embodiment 3

[0040] In the process of synthesizing titanium dioxide-mesoporous polymer nanoporous composite visible light catalytic materials, the synthesis solvent in the synthesis process of materials is modulated.

[0041] Add 2.0g DVB, 0.72g 1-vinylimidazole (VI) to the mixed solution containing 0.065g AIBN and 20-30mL tetrahydrofuran, then add 2.5mL n-butyl titanate (TBOT), stir at room temperature for 3 hours, 100℃ After hydrothermal treatment for 24 hours, a brownish-yellow blocky solid was obtained. In order to fully crystallize the titanium dioxide in the material, open the lid of the reactor after hydrothermal treatment, add 2-3mL of water, continue the hydrothermal treatment at 150°C for 24 hours, take it out, and open the lid. The solvent is volatilized to obtain PDVB-VI-TiO 2 -0.92. DVB / AIBN / VI / TBOT / THF was 1 / 0.026 / 0.5 / 0.46 / 16.7 during the synthesis process.

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Abstract

The invention provides a preparation method of a titanium dioxide-mesoporous polymer nano porous composite visible light catalytic material, which comprises the following steps: a. polymerizing azodiisobutyronitrile used as initiator, divinylbenzene used as a crosslinking monomer, 4-vinyl pyridine or 1-vinyl imidazole used as a functional monomer and n-butyl titanate used as a titanium source under solvothermal conditions at 80-140 DEG C for 12-24 hours, thus obtaining a bulk polymer solid; and b. placing the polymer solid product into a reaction kettle, adding a right amount of water, and performing hydrothermal treatment at 150-180 DEG C for 10-24 hours, thus obtaining the titanium dioxide-mesoporous polymer multistage nano porous composite visible light catalytic material. The material preparation method is simple; the obtained photocatalyst has excellent enriching effect and catalytic degradation activity on organic pollutants, especially decabromobisphenol A; and the bulk shape is beneficial to the recycling of the catalyst in the use process.

Description

technical field [0001] The invention belongs to the technical field of material science, and in particular relates to a preparation method of a titanium dioxide-mesoporous polymer nanoporous composite visible light catalytic material with a large specific surface area and excellent enrichment effect on organic pollutants. Background technique [0002] Since Fujishim et al. discovered in 1972 that titanium dioxide can produce hydrogen by photolysis of water (Nature 1972, 238, 37), crystalline titanium dioxide series materials have received more and more attention as an important class of inorganic semiconductor materials. Compared with other materials, titanium dioxide material has low cost, excellent chemical stability and high photoelectric conversion efficiency. So far, titanium dioxide series have been widely used in optoelectronic devices, photoelectric sensors, dye-sensitized solar cells and photocatalysis. [0003] From the perspective of photocatalysis, titanium diox...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/38B01J35/10C02F1/30
Inventor 刘福建李建涛刘华
Owner SHAOXING UNIVERSITY
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