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Micropore luminous composite material and preparation method thereof

A composite material and microporous technology, which is applied in the field of microporous luminescent composite materials and their preparation, can solve the problems of no visual detection means, low product purity, expensive synthetic raw materials, etc., and achieve good stability of the main structure and high product purity , low cost effect

Inactive Publication Date: 2013-05-01
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two reasons for this: 1. The synthetic raw materials are expensive, the product purity is not high, and the yield is extremely low; 2. Although some microporous structures can reflect the adsorption and desorption performance of small molecules, there is no intuitive detection method, and it is difficult to exert them in practical applications. effect

Method used

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  • Micropore luminous composite material and preparation method thereof
  • Micropore luminous composite material and preparation method thereof
  • Micropore luminous composite material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0024] Dissolve 0.216g lanthanum nitrate, 0.118g succinic acid, and 0.062g isonicotinic acid in 10 mL H 2 O middle. After stirring evenly, add a few drops of ammonia water until the pH of the solution is 4.2, showing a weakly acidic solution. The above solution was sealed in a stainless steel polytetrafluoroethylene-lined reaction kettle and heated at 160° C. for three days. Cool to room temperature at a rate of 5°C per hour. The product is a colorless needle-like crystal, which can be used after washing several times with water. Yield 41%.

Embodiment 2

[0026] Dissolve lanthanum nitrate, succinic acid, and isonicotinic acid in a molar ratio of 1:2:1 in 10-20 mL H 2 O, stir evenly, add ammonia water until the pH value of the solution is 4.2;

[0027] (2) The above solution was sealed in a stainless steel polytetrafluoroethylene-lined reaction kettle, heated at 150°C for 4 days; cooled to room temperature at a rate of 4°C / h, and the product was a colorless needle-like crystal.

Embodiment 3

[0029] Dissolve lanthanum nitrate, succinic acid, and isonicotinic acid in a molar ratio of 1:2:1 in 10-20 mL H 2 O, stir evenly, add ammonia water until the pH value of the solution is 4.2;

[0030] (2) The above solution was sealed in a stainless steel polytetrafluoroethylene-lined reaction kettle, heated at 170°C for 2 days; cooled to room temperature at a rate of 6°C / h, and the product was a colorless needle-like crystal.

[0031] Product characterization: Select a single crystal with good crystal phase, suitable size and no obvious defects in the product, and use X-ray single crystal diffractometer to collect diffraction data for structural analysis. The data of the single crystal structure shows that it is a metal-organic composite material, and the structure of the material contains nano-sized pores, which are occupied by free water molecules. The product was subjected to X-ray powder diffraction to characterize the crystal phase and purity of batches of macroscopic pr...

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Abstract

The invention discloses a micropore luminous composite material and a preparation method thereof; lanthanum nitrate, succinic acid and isonicotinic acid are resolved in water according to the molar ratio of 1:2:1; a regulating system is weakly acidic; a stainless steel reaction kettle lined with polytetrafluoroethylene is used for hermetically heating to 150 DEG C to 170 DEG C and for reaction for 2 to 4 days, then the temperature decreases to obtain colorless crystal, and the productivity is 41%. The product adopts the structure of a micropore type composite material and has water absorption and desorption functions and the characteristic of representing remarkable red shift of emission wavelength. The wavelength of optical waves emitted by a newly-produced sample containing water at ambient temperature is 354 to 364 nm; and the material is heated to 200 DEG C until being dehydrated, and then the wavelength of emitted optical waves is 423 nm. The micropore luminous composite material has an excellent optical property, good heat stability and favorable chemical stability, can stably exists in an acid / alkali environment with the pH of 2.5 to 9.0; and the preparation method is simple and convenient and is good in reproducibility.

Description

technical field [0001] The invention belongs to the field of material preparation, and in particular relates to a microporous light-emitting composite material and a preparation method thereof. Background technique [0002] Metal-organic coordination polymers are a class of composite materials with novel structures. Due to its diverse structure, strong adjustability, and rich performance, it has been closely watched in the field of applied materials. Among them, metal-organic composites with microporous structures can play a unique role in the application of small molecule adsorption and desorption. The study found that the microporous structure of metal-organic composites can be independently designed to adjust the size and shape of the microporous structure. The reported micropore size is generally between 10 -10 – 10 -7 m, the shapes are tubular, cave-like, cage-like, etc. Among them, nanometer-sized microporous composite materials are more advantageous for the ads...

Claims

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Application Information

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IPC IPC(8): C09K11/06C07F5/00
Inventor 吴舒婷姜秀玲黄云黄长沧
Owner FUZHOU UNIV
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