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Preparation and catalytic performance of polyacid-based metal organic framework crystal material with intercalation structure

An organic framework and metal-based technology, which is applied in the preparation and catalytic performance of polyacid-based metal-organic frameworks, can solve the problems of high difficulty and low recycling rate, and achieve the effects of maintaining catalytic activity, solving surface reactions, and stabilizing the structure

Active Publication Date: 2019-06-14
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the difficulty of synthesizing polyacid-based metal-organic framework crystal materials with nanopores using the prior art and the problems that traditional polyacids are easily soluble in water and low in recycling rate as catalysts, and provide an intercalation Preparation method and properties of multi-acid-based metal-organic frameworks

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  • Preparation and catalytic performance of polyacid-based metal organic framework crystal material with intercalation structure
  • Preparation and catalytic performance of polyacid-based metal organic framework crystal material with intercalation structure
  • Preparation and catalytic performance of polyacid-based metal organic framework crystal material with intercalation structure

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specific Embodiment approach 1

[0028] Specific implementation mode 1: This implementation mode is a polyacid-based metal-organic framework material with an intercalation structure whose chemical formula is [Cu I 2 Cu II 5 (ptz) 6 (OH) 2 (4H 2 O)GeW 12 o 40 ]·6H 2 O, wherein, ptz is 5-(pyridin-2-yl)tetrazolium; crystal system is triclinic; space group is P-1; unit cell parameters are α=100.244(5), β=91.097(5), γ=111.053(5), z=1.

[0029] The [Cu I 2 Cu II 5 (ptz) 6 (OH) 2 (4H 2 O)GeW 12 o 40 ]·6H 2 Cu in OI The valence is +1, the coordination mode is 4 coordination, Cu II The valence is +2, and the coordination mode is 6 coordination.

[0030] Compared with the prior art, this embodiment has the following characteristics:

[0031] The present invention adopts a simple one-step hydrothermal synthesis method. The present invention adopts a simple one-step hydrothermal synthesis method, and for the first time successfully prepared A polyacid-based metal organic framework material wit...

specific Embodiment approach 2

[0032] Specific implementation mode 2: This implementation mode is a polyacid-based metal-organic framework material with an intercalation structure, which is completed according to the following steps:

[0033] 1. Prepare a reaction solution with a pH value of 3.5: dissolve germanium tungstic acid, copper chloride, and 5-(pyridin-2-yl)tetrazolium organic ligand into deionized water to obtain a reaction solution; Adjust to 3.5 to obtain a reaction solution with a pH value of 3.5;

[0034] The molar ratio of the germanium tungstic acid described in the step 1 and the metal copper salt is: 0.1:(0.2~1);

[0035] The molar ratio of the germanium tungstic acid described in step 1 to the tetrazolium-containing organic ligand is: 0.1:(0.2~0.5);

[0036] The volume ratio of the amount of germanotungstic acid described in step 1 to distilled water is: 0.1mmol: (20ml~35ml);

[0037] 2. Add the reaction solution with a pH value of 3.5 into the polytetrafluoroethylene reactor, react at ...

specific Embodiment approach 3

[0041] Embodiment 3: The difference between this embodiment and Embodiment 2 is that the metal copper salt described in step 1 is copper chloride, copper nitrate or copper acetate. Others are the same as in the second embodiment.

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Abstract

The invention aims to develop a polyacid-based metal organic framework crystal material with an intercalation structure, which effectively overcomes the technical bottlenecks that a simple polyacid material is wide in band gap (3 eV), can only absorb ultraviolet light, is soluble in water, and has a recover rate, and the like. Special intercalation structure characteristics of the material are utilized to improve the electron storage capacity of polyacid as an electron acceptor, accelerate the separation of catalytic photo-generated carriers, enhance the photocatalytic efficiency of a catalyst, and expand the spectral absorption range to visible light. The chemical formula of the polyacid-based metal organic framework crystal material with the intercalation structure is designed and developed as [CuI2CuII5(ptz)6(OH)2(4H2O)GeW12O40].6H2O. A method for preparing the material comprises the following steps: dissolving germanium tungstate, copper chloride and 5-(pyridine-2-yl)tetrazole organic ligand into deionized water to obtain a reaction solution, adjusting a pH value, and then reacting at a temperature of 160 DEG C for 3 days. . The metal organic framework crystal material with thepolyacid-based intercalation structure having visible light catalytic properties can be obtained.

Description

technical field [0001] The invention relates to the preparation and catalytic performance of a polyacid-based metal-organic framework with an intercalation structure Background technique [0002] Polyoxometalates (POMs) is the abbreviation of polyoxometalates. It has been an important development field in inorganic chemistry. It is a class of nano-sized polyoxometalates with a clear structure. Both can be regulated, and can perform fast, reversible, step-by-step multi-electron transfer in chemical reactions without changing its structure. Therefore, polyacids have been widely used in magnetic materials, optoelectronic materials, pharmaceuticals, and catalytic reactions. [0003] Solar energy is a new type of energy that is clean, renewable and widely available. The increasing scarcity of fossil fuels and the environmental problems caused by their use have made people more and more interested in the development and utilization of solar energy, among which the conversion of ...

Claims

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Application Information

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IPC IPC(8): B01J31/22
Inventor 庞海军李坤骐沈清波马慧媛张春晶王新铭
Owner HARBIN UNIV OF SCI & TECH
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