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Tungsten series or molybdenum series polyoxometallate supermolecular compound as well as preparation method and application thereof

A technology of polyoxometalates and supramolecular compounds, which is applied in the field of photocatalysis to achieve high catalytic efficiency and wide application range

Inactive Publication Date: 2013-03-27
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a tungsten-based polyoxometalate supramolecular compound, which solves the technical problem that the photocatalyst cannot be used to initiate the polymerization reaction of vinyl monomers in the prior art

Method used

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  • Tungsten series or molybdenum series polyoxometallate supermolecular compound as well as preparation method and application thereof
  • Tungsten series or molybdenum series polyoxometallate supermolecular compound as well as preparation method and application thereof
  • Tungsten series or molybdenum series polyoxometallate supermolecular compound as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0036] The preparation of embodiment 1 photocatalyst

[0037] In a 250mL four-necked bottle, add 100mL of absolute ethanol and 100g of phosphotungstic acid respectively, and stir to dissolve them completely. 100 mL of 1-methyl-3-butylimidazole chloride with a mass concentration of 20% was added dropwise, and white flocs gradually appeared in the system. Stirring was maintained for 2 hours and then left to stand overnight. The product was centrifuged and dried in vacuo to recall the desired Catalyst 1. During the reaction, the reaction temperature was maintained at -20°C. Through X-ray diffraction, obtain the X-ray single crystal diffraction of photocatalyst namely crystal structure data as follows:

[0038] Bond precision: C-C=0.0177A Wavelength=0.71073

[0039] Cell: a=17.895(5) b=18.391(5) c=16.676(4)

[0040] alpha=90beta=90 gamma=90

[0041] Temperature: 291K

[0042] Calculated Reported

[0043] Volume 5488(3) 5488(3)

[0044] Spac...

Embodiment 2

[0062] The preparation of embodiment 2 photocatalysts

[0063] In a 250mL four-necked bottle, add 100mL of absolute ethanol and 100g of aluminophosphate respectively, and stir to dissolve them completely. 50 mL of 1-methyl-3-butylimidazole bromide with a mass concentration of 25% was added dropwise, and white flocs gradually appeared in the system. Stirring was maintained for 2 hours and then left to stand overnight. The product was centrifuged and dried in vacuo to recall the desired Catalyst 2. During the reaction process, the reaction temperature was always maintained at 0°C.

Embodiment 3

[0064] The preparation of embodiment 3 photocatalysts

[0065] In a 250mL four-necked bottle, add 100mL of absolute ethanol and 100g of phosphotungstic acid respectively, and stir to dissolve them completely. 20 mL of 1-methyl-3-butylimidazole iodide with a mass concentration of 30% was added dropwise, and white flocs gradually appeared in the system. Stirring was maintained for 2 hours and then left to stand overnight. The product was centrifuged and dried in vacuo to recall the desired Catalyst 3. During the reaction, the reaction temperature was maintained at 10°C.

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Abstract

The invention discloses a tungsten series and molybdenum series polyoxometallate super molecular compound as well as a preparation method and application thereof. A molecular formula of the compound is (BMI)2(DMDI)(PM12O40), wherein BMI and DMDI are of a monoclinic system of the compound, the space group is pbcn, and the cell parameters are follows: a=17.895(5), b=18.391(5), c=16.676(4), and alpha=beta=gamma=90. In the molecular formula of the compound, tungsten series polyoxometallate is a basic construction unit of the compound and forms a one-dimensional chain (BMI)2(DMDI)(PM12O40) structure through hydrogen bonds along an a axis. The catalyst has the characteristics: in the catalytic polymerization, sunlight irradiation polymerization can be achieved, Mn and PD values of a polymer are controllable randomly, the catalyst can be recovered and recycled, and the like.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a tungsten-based polyoxometalate supramolecular compound and a preparation method and application thereof. Background technique [0002] Photocatalyst, that is, photocatalyst, is a chemical substance that accelerates a chemical reaction under the excitation of photons, and does not participate in the reaction itself. Photocatalytic technology is a basic nanotechnology born in the 1970s. A typical natural photocatalyst is chlorophyll, which promotes the synthesis of carbon dioxide and hydration in the air into oxygen and carbohydrates in the photosynthesis of plants. Photocatalytic technology is mainly used in many cutting-edge fields such as environmental purification, self-cleaning materials, advanced new energy, cancer medical treatment, and high-efficiency antibacterial. [0003] Photocatalysts, especially visible light catalysis, are one of the most active...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/34B01J31/22C08F2/48
Inventor 陈奠宇袁荣鑫柴文马运声休谟耶提·罗伊
Owner CHANGSHU INSTITUTE OF TECHNOLOGY
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