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Metal-organic nanotube microporous crystalline material encapsulating [vw12]4-clusters and its preparation method and application

A metal-organic and nanotube technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, it can solve the problems of difficult synthesis, poor iodate effect, etc., and achieve and effective electrocatalytic activity. Effect

Inactive Publication Date: 2018-03-16
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the synthesis difficulty of existing polyacid-based metal-organic framework crystalline materials is large and the electrochemical method detects the poor effect of iodate, and provides capsule [VW 12 ] 4- Cluster metal-organic nanotube microporous crystalline material and its preparation method and application

Method used

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  • Metal-organic nanotube microporous crystalline material encapsulating [vw12]4-clusters and its preparation method and application
  • Metal-organic nanotube microporous crystalline material encapsulating [vw12]4-clusters and its preparation method and application
  • Metal-organic nanotube microporous crystalline material encapsulating [vw12]4-clusters and its preparation method and application

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specific Embodiment approach 1

[0037] Specific implementation mode one: this implementation mode is capsule [VW 12 ] 4- The chemical formula of the cluster metal-organic nanotube microporous crystalline material is [Co 2 (bimb) 2 VW 12 o 40 ]·[bimb]·5H 2 O, where bimb is 1,4-bis(1-imidazolyl)benzene; the crystal system is orthorhombic; the space group is Pnma; the unit cell parameters are α=90°, β=90°, γ=90°, Z=4.

[0038] Compared with the prior art, this embodiment has the following characteristics:

[0039] 1. This embodiment adopts simple hydrothermal synthesis technology, and for the first time successfully prepared capsules using the bidentate ligand 1,4-bis(1-imidazolyl)benzene, sodium tungstate, ammonium metavanadate, and metal cobalt salt[ VW 12 ] 4- Clustered metal-organic nanotube microporous crystalline material; in its crystal structure, [VW 12 ] 4- Guest clusters, as hexaconnectors, are wrapped in hexagonal metal-organic nanotubes constructed by metal-organic zigzag chains, formi...

specific Embodiment approach 2

[0042] Specific implementation mode two: this implementation mode is capsule [VW 12 ] 4- The preparation method of the metal-organic nanotube microporous crystalline material of the cluster is completed according to the following steps:

[0043]1. Prepare a reaction solution with a pH value of 3: Dissolve sodium tungstate, ammonium metavanadate, metal cobalt salt and 1,4-bis(1-imidazolyl)benzene into distilled water to obtain a reaction solution; The pH value is adjusted to 3 to obtain a reaction solution with a pH value of 3;

[0044] The mol ratio of sodium tungstate described in step 1 and ammonium metavanadate is 1:(0.08~0.30);

[0045] The mol ratio of sodium tungstate described in step 1 and metal cobalt salt is 1:(0.17~0.50);

[0046] The mol ratio of sodium tungstate described in step 1 to 1,4-bis(1-imidazolyl)benzene is 1:(0.25~0.50);

[0047] The volume ratio of the amount of substance of the sodium tungstate described in step 1 to distilled water is 1mmol: (10mL...

specific Embodiment approach 3

[0054] Embodiment 3: The difference between this embodiment and Embodiment 2 is that the metal cobalt salt is cobalt nitrate, cobalt acetate or cobalt sulfate. Other steps are the same as in the second embodiment.

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Abstract

The invention provides an encapsulated [VW12]4-cluster metal organic nanotube micropore crystalline state material, and a preparation method and an application thereof and relates to a multi-acidic group micropore crystalline state material, and a preparation method and the application thereof. The invention aims to solve the problems that the synthesis difficulty of the present multi-acidic group metal-organic frame crystalline state material is high and the effect of detecting iodate according to an electrochemical method is poor. The chemical formula of the encapsulated [VW12]4-cluster metal organic nanotube micropore crystalline state material is [Co2(bimb)2VW12O40].[bimb].5H2O. The method comprises the following steps: 1) preparing a reaction solution; 2) causing the reaction solution react for 3 days in a polytetrafluoroethylene reaction kettle, and then cooling to room temperature. An encapsulated [VW12]4-cluster metal organic nanotube micropore crystalline state material modified carbon paste electrode is taken as an electrocatalyst for reducing potassium iodate and is used for efficiently detecting iodate ions. According to the method provided by the invention, the encapsulated [VW12]4-cluster metal organic nanotube micropore crystalline state material can be acquired.

Description

technical field [0001] The invention relates to a polyacid-based microporous crystalline material, a preparation method and an application. Background technique [0002] Polyoxometalates (POMs for short) are a class of inorganic metal-oxygen clusters. Due to their composition and structural diversity, they have a wide range of applications in catalysis, nanotechnology, biomedicine, and material science. Research. Because polyacids (POMs) have the characteristics of high proton acidity, high activity at low temperature, excellent thermal stability, good proton migration ability and the unique "pseudo-liquid phase" reaction field of heteropolyacids, they have shown great potential in catalysis. big advantage. [0003] Metal-Organic Frameworks (MOFs) are a class of compounds formed by metal ions and organic ligands, with high specific surface area and adjustable pore structure. Metal-organic frameworks (MOFs) have structural diversity due to the difference of metal centers a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22B01J35/10B82Y30/00B82Y40/00G01N27/30
CPCB01J31/1815B01J35/10B82Y30/00B82Y40/00G01N27/308
Inventor 庞海军王默赵春艳马慧媛张春晶
Owner HARBIN UNIV OF SCI & TECH
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