Metal-organic framework material, Rhodamine B sensitized metal-organic framework material as well as preparation method and application thereof

An organic framework and metal technology, applied in the field of metal-organic framework crystalline materials, can solve the problems of high price, difficult to achieve industrial production, and small earth reserves, and achieve easy mass production, improve photoelectric performance, and promote inter-system crossing. and the effect of triplet

Pending Publication Date: 2019-05-17
LUOYANG NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, precious metals such as platinum and palladium have good electrocatalytic activity, which can effectively reduce the hydrogen evolution overpotential and reduce energy loss, but their earth reserves are small and expensive, making it difficult to realize industrial production

Method used

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  • Metal-organic framework material, Rhodamine B sensitized metal-organic framework material as well as preparation method and application thereof
  • Metal-organic framework material, Rhodamine B sensitized metal-organic framework material as well as preparation method and application thereof
  • Metal-organic framework material, Rhodamine B sensitized metal-organic framework material as well as preparation method and application thereof

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preparation example Construction

[0032] The present invention also provides a method for preparing the metal-organic framework material described in the above technical solution, comprising the following steps:

[0033] The aqueous solution of zinc salt is added to the mixed aqueous solution of 2-methylimidazole and isophthalic acid to carry out rapid precipitation reaction to obtain the metal-organic framework material.

[0034] In the present invention, the molar ratio of the isophthalic acid, zinc salt and 2-methylimidazole is preferably 1:2-4:2-4, more preferably 1:3:3. In the present invention, there is no special limitation on the type of the zinc salt, and a zinc salt well-known to those skilled in the art can be used, specifically, zinc nitrate.

[0035] In the present invention, the dosage ratio of zinc salt to water in the aqueous solution of zinc salt is preferably 1 g:6˜14 mL.

[0036] In the present invention, the temperature of the rapid precipitation reaction is preferably room temperature wit...

Embodiment 1

[0050] An aqueous solution (2 mL) of 1.19 g of zinc nitrate was added to an aqueous solution (8 mL) of 2-methylimidazole (0.328 g) and isophthalic acid (0.332 g), stirred rapidly, precipitated, washed, and dried to obtain zinc-isophthalic acid Diformic acid metal-organic framework, denoted as Y346 powder material.

[0051] An aqueous solution (2mL) of 1.19g of zinc nitrate was added to an aqueous solution (8mL) of rhodamine B (3mg), 2-methylimidazole (0.328g), isophthalic acid (0.332g) and rapidly stirred, precipitated, After washing and drying, the target product rhodamine B sensitized metal-organic framework material was obtained, which was denoted as RhB@Y346.

[0052] The prepared metal-organic frameworks and rhodamine B-sensitized metal-organic frameworks were characterized as follows:

[0053] (1) Determination of the crystal structure of metal-organic framework materials

[0054] A single crystal with a suitable size is selected for X-ray diffraction experiment at roo...

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Abstract

The invention provides a metal-organic framework material and belongs to the field of metal-organic framework crystalline-state materials. In a compound structure provided by the invention, organic phosphor and metal ions (zinc) are subjected to a coordination action force and the organic phosphor can be fixed in a metal-organic framework rigid skeleton to inhibit the intramolecular motion of thephosphor, limit the thermal vibration necessary for triplet-state non-radiation attenuation and also promote the intersystem crossing and a triplet state, so that long-service-life room-temperature phosphorescence and effective exciton migration are realized. Therefore the metal-organic framework material with a long phosphorescence service life is designed and synthesized and has important actualapplication value in the aspects of prolonging the service life of excitons and extending a migration distance, and improving the photoelectric properties of the material; meanwhile, after a Rhodamine dyestuff is doped, the photoresponse of the material can be extended to a visible light region from a single ultraviolet light region and the photoelectric properties of the material can be furtherimproved.

Description

technical field [0001] The invention relates to the technical field of metal-organic framework crystalline materials, in particular to a metal-organic framework material, a rhodamine B-sensitized metal-organic framework material and a preparation method and application thereof. Background technique [0002] With the depletion of fossil fuels and worsening environmental problems, people are paying more and more attention to the development of clean, pollution-free and renewable alternative energy sources. Among a series of new energy sources to be developed, hydrogen is considered an ideal substitute for fossil fuels because of its highest specific energy density and environmental friendliness. The use of electrocatalytic water splitting to produce hydrogen energy has the advantages of low energy consumption, environmentally friendly process, high product purity, and high energy conversion efficiency. It is considered to be a promising way for energy storage and conversion. ...

Claims

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Application Information

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IPC IPC(8): C08G83/00B01J31/22C01B3/04
CPCY02E60/36
Inventor 杨晓刚常新红周战鲁小敏马录芳
Owner LUOYANG NORMAL UNIV
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