A conductive metal organic framework nanorod array composite material and its preparation and application

A nanorod array and organic framework technology, applied in the field of nanomaterials, can solve the problems of unsatisfactory electrocatalytic performance, poor conductivity, difficult metal oxide compounding, etc., and achieve good selectivity, low detection limit, and excellent sensing performance Effect

Active Publication Date: 2022-03-29
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the above defects of the prior art, the present invention provides a method for preparing a conductive metal organic framework nanorod array composite material, which synthesizes a conductive metal organic framework nanorod array composite material by etching, epitaxial growth and in-situ electrical reduction

Method used

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  • A conductive metal organic framework nanorod array composite material and its preparation and application
  • A conductive metal organic framework nanorod array composite material and its preparation and application
  • A conductive metal organic framework nanorod array composite material and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of copper-based organic framework nanocomposites Cu 2 O / CuHHTP / Cu 2 O NP, including the following steps:

[0031] (1) Use ethanol, 3mol / L hydrochloric acid and deionized water to ultrasonically clean the copper foam for 10 minutes;

[0032] (2) the copper foam obtained in step (1) is placed in 2.5mol / L NaOH and 0.2mol / L (NH 4 ) 2 S 2 o 8 Cu(OH) supported by foamed copper was obtained by chemical oxidation in the mixed solution of 2 Nanorod arrays, such as figure 1 A in and figure 1 shown in B in;

[0033] (3) soak the foamed copper / copper hydroxide obtained in step (2) in the methanol solution of HHTP (the concentration of HHTP is 0.006mol / L) and heat water for 12h to generate Cu 2 O / CuHHTP core-shell nanorod arrays, such asfigure 1 C in and figure 1 as shown in D;

[0034] (4) the copper foam / Cu that generates in step (3) 2 Electroreduction of O / CuHHTP core-shell nanorod arrays with 0.1M PBS (ph=7.4) at -0.6V for 2h to obtain Cu 2 O particle em...

Embodiment 2

[0039] The difference between this example and Example 1 is that the conductive metal organic framework ligands used in step (3) are different, as described below.

[0040] (1) Use ethanol, 3mol / L hydrochloric acid and deionized water to ultrasonically clean the copper foam for 10 minutes;

[0041] (2) the copper foam obtained in step (1) is placed in 2.5mol / L NaOH and 0.2mol / L (NH 4 ) 2 S 2 o 8 Cu(OH) supported by foamed copper was obtained by chemical oxidation in the mixed solution of 2 nanorod arrays;

[0042] (3) soak the foamed copper / copper hydroxide obtained in step (2) in the methanol solution of HITP (the concentration of HITP is 0.006mol / L) and heat water for 12h to generate Cu 2 O / CuHITP core-shell nanorod arrays;

[0043] (4) the copper foam / Cu that generates in step (3) 2 Cu was obtained by electroreduction of O / CuHITP core-shell nanorod arrays and 0.1M PBS (ph=7.4) solution at -0.6V for 2h 2 O particle embedded Cu 2 O / CuHITP / Cu 2 O NP nanorod arrays. ...

Embodiment 3

[0045] This example differs from Example 1 in that the electroreduction voltage and electroreduction time of the electrochemical reduction are different, as described below.

[0046] (1) Use ethanol, 3mol / L hydrochloric acid and deionized water to ultrasonically clean the copper foam for 10 minutes;

[0047] (2) the copper foam obtained in step (1) is placed in 2.5mol / L NaOH and 0.2mol / L (NH 4 ) 2 S 2 o 8 Cu(OH) supported by foamed copper was obtained by chemical oxidation in the mixed solution of 2 nanorod arrays;

[0048] (3) Soak the foamed copper / copper hydroxide obtained in step (2) in the methanol solution of HHTP (the HHTP concentration is 0.006mol / L) and heat it for 3h to generate Cu 2 O / CuHHTP core-shell nanorod arrays;

[0049] (4) the copper foam / Cu that generates in step (3) 2 Electroreduction of O / CuHHTP core-shell nanorod arrays with 0.1M PBS (ph=7.4) at -0.8V for 1h to obtain Cu 2 O particle embedded Cu 2 O / CuHHTP / Cu 2 O NP nanorod arrays.

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Abstract

The invention belongs to the technical field of nanometer materials, and in particular relates to a conductive metal organic framework nanorod array composite material and its preparation and application. The preparation method of the present invention comprises the following steps: (s1) self-assembling the hydroxide nanorod array and the conductive organic ligand through hydrothermal reaction to obtain the core-shell structure nanorod array; (s2) in situ forming the core-shell structure nanorod array By electrochemical reduction, the conductive metal organic framework nanorod array composite material can be obtained. The present invention synthesizes the conductive metal organic framework nanorod array composite material through etching, epitaxial growth and in-situ electric reduction, and completes the directional growth of the conductive metal organic framework, the generation of metal oxides and the effective compounding with the metal organic framework. The in situ electrochemical reduction method completes the recombination of conductive metal organic frameworks and metal oxides, which has broad application prospects as a detection and sensing platform.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a conductive metal organic framework nanorod array composite material and its preparation and application. Background technique [0002] Metal-organic frameworks (MOFs) are crystalline materials composed of metal ions and organic ligands with large surface area, customizable composition, and porous structure, resulting in high surface chemical activity, large chemisorption capacity, and high Surface-to-volume ratio, showing great potential in molecular recognition, energy, gas separation, etc. Especially as catalysts, MOFs have certain selectivity and good catalytic activity. However, the vast majority of MOFs have poor electrical conductivity, which severely limits their applications in electrochemical sensing. Therefore, a very desirable strategy is to develop conductive metal-organic framework composite metal oxide materials to improve the conductivit...

Claims

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Application Information

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IPC IPC(8): C08G83/00B01J31/22B01J31/28B01J35/00G01N27/30
CPCC08G83/008B01J31/1691B01J31/2213B01J31/1815B01J31/28B01J35/0033G01N27/308B01J2531/16
Inventor 刘宏芳江立培王正运李广芳
Owner HUAZHONG UNIV OF SCI & TECH
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