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Preparation method of up-conversion luminescent material based on triplet-triplet annihilation

A technology of triplet annihilation and luminescent materials, which is applied in the field of preparation of up-conversion luminescent materials, can solve the problems of restricting the application effect of semiconductor materials, wide band gap, photosensitizer degradation of water pollution, etc., and achieve enhanced sunlight utilization rate and strong absorption , the effect of improving efficiency

Inactive Publication Date: 2014-08-13
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, this type of photosensitizer has certain defects: it has a wide band gap, can only absorb ultraviolet light, has no response to visible light and infrared light, and the utilization rate of sunlight is only 3-5%. Application Effects in Processing Fields
[0008] The inventors have found that TTA up-conversion materials have not been successfully applied to sewage treatment at present, especially semiconductor materials excited by ultraviolet light (TiO 2 、C 3 N 4 etc.) as photosensitizers to degrade pollutants in water

Method used

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  • Preparation method of up-conversion luminescent material based on triplet-triplet annihilation
  • Preparation method of up-conversion luminescent material based on triplet-triplet annihilation
  • Preparation method of up-conversion luminescent material based on triplet-triplet annihilation

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Experimental program
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Effect test

Embodiment 1

[0037] 1. Preparation of triplet photosensitizer Pt-1

[0038] Add m-1 (90mg, 0.20mmol) to 10mL of dichloromethane, add R-1 (30mg, 0.26mmol), CuI (7.0mg, 0.036mmol) and i-Pr under nitrogen protection 2 NH (1 mL). The mixture was stirred at room temperature for 24 hours, and the crude product was purified by column chromatography (developing solvent: dichloromethane) to obtain 69.0 mg of a yellow solid with a yield of 53.2%. MALDI-HRMS:calcd([C 32 h 20 N 3 Pt+H] + )m / z=641.1305, found m / z=641.1343.

[0039] 2. Preparation of upconversion materials using triplet photosensitizer Pt-1 and energy acceptor 9,10 diphenylanthracene (DPA)

[0040] 2g of polymethyl methacrylate (PMMA) was dissolved in N'N-dimethylformamide (DMF), and 0.1 mmol of triplet photosensitizer Pt-1 and 19 mmol of DPA were added to the mixed solution and stirred to a homogeneous solution. Pour the solution with photosensitizer and annihilation agent DPA into a glass mold, put the mold into a vacuum oven f...

Embodiment 2

[0043] Embodiment 2. Utilize the Pt-1 up-conversion device prepared in embodiment 1 and TiO 2 Degradation of methyl orange

[0044] Using a 35W xenon lamp as the light source, the prepared up-conversion material is placed between the light source and the photocatalytic reaction container. At this time, the visible light emitted by the xenon lamp passes through the up-conversion material to convert the visible light into ultraviolet light and excite TiO 2 degrades methyl orange. TiO 2 Add to the methyl orange solution containing 250mL, the initial concentration of grade A orange is 20mg / L. The light source is a 35W xenon lamp. After 5 hours of light reaction, the decolorization rate of methyl orange reaches 100%, and the methyl orange is completely degraded.

Embodiment 3

[0045] Embodiment 3. Pt-2 up-conversion device and TiO prepared according to the method of embodiment 1 2 Degradation of methyl orange

[0046] Using a 35W xenon lamp as the light source, the prepared up-conversion material is placed between the light source and the photocatalytic reaction container. At this time, the visible light emitted by the xenon lamp passes through the up-conversion material to convert the visible light into ultraviolet light and excite TiO 2 degrades methyl orange. TiO 2 Add to the methyl orange solution containing 250mL, the initial concentration of grade A orange is 20mg / L. The light source is a 35W xenon lamp. After 6 hours of light reaction, the decolorization rate of methyl orange reached 100%, and the methyl orange was completely degraded.

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Abstract

The invention relates to a preparation method of an up-conversion luminescent material based on triplet-triplet annihilation and application of the material to a light-catalyzed reaction. The up-conversion luminescent material comprises a triplet photosensitizer, an energy receptor and a high-molecular polymer, wherein the molar ratio of the triplet photosensitizer to the energy receptor is 1 to (50-1) to 250. The triplet photosensitizer can be used for achieving strong absorption of visible spectrum, and visible light is converted into ultraviolet light by virtue of a triplet-triplet annihilation process, so that the utilization rate of sunlight is effectively increased and the light degradation efficiency of organic matters in water is improved.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic water treatment, and in particular relates to the preparation of a class of up-conversion luminescent materials based on triplet-triplet annihilation and its application in the field of photocatalytic water treatment. Background technique [0002] With the rapid development of industry, a large amount of waste water containing organic pollutants is discharged into nature, which makes the living environment of human beings worse. Dye wastewater accounts for a large proportion of various wastewater to be treated. Dye wastewater has deep chroma, high toxicity, high concentration, and stable chemical properties. It is difficult to be degraded by traditional chemical and biological methods, and it has become one of the environmental pollutants that need to be solved urgently. . [0003] At present, semiconductor materials (such as: TiO 2 、WO 3 、C 3 N 4 ) as a photosensitizer to treat dye wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F15/00C09K11/06C02F1/32
CPCY02W10/37
Inventor 吴文婷赵建章吴明铂郑经堂吴雪岩李忠涛江波李子樹
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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