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Ferrocene-based ultrathin metal-organic framework nanosheets loaded with palladium and preparation method thereof

An ultra-thin metal, organic framework technology, applied in the field of material chemistry, can solve the problems of destroying the structure of metal organic framework nanosheets, harsh reduction conditions, and inability to guarantee the loading of metal nanoparticles, achieving excellent catalytic performance and mild in-situ reduction conditions. , the effect of avoiding structural damage

Active Publication Date: 2020-07-31
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method cannot guarantee that all metal nanoparticles are loaded into the pores of MOF nanosheets.
Secondly, the reduction conditions used are too harsh, which may destroy the structure of metal organic framework nanosheets

Method used

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  • Ferrocene-based ultrathin metal-organic framework nanosheets loaded with palladium and preparation method thereof
  • Ferrocene-based ultrathin metal-organic framework nanosheets loaded with palladium and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In a 500mL round-bottom flask, add ultra-thin metal-organic framework nanosheets (5mg) and water (250mL), and disperse them by ultrasonication for 30min to obtain an ultra-thin metal-organic framework nanosheet dispersion. Potassium chloropalladate (1.63 mg, 0.1 mmol) was added to the dispersion, and reacted at 30°C for 5 hours. After the reaction, centrifuge (3000rpm, 30min) to obtain a precipitate. The resulting precipitate was re-dispersed ultrasonically with water (30 mL), and centrifuged again to obtain the precipitate. After repeating the above ultrasonic dispersion and centrifugation operations three times, the palladium-loaded ultrathin metal organic framework nanosheets were obtained.

Embodiment 2

[0037] In a 500mL round-bottom flask, add ultra-thin metal-organic framework nanosheets (100mg) and water (250mL), and disperse them by ultrasonication for 30min to obtain an ultra-thin metal-organic framework nanosheet dispersion. Potassium chloropalladate (32.6 mg, 0.1 mmol) was added to the dispersion, and reacted at 30°C for 5 hours. After the reaction, centrifuge (3000rpm, 30min) to obtain a precipitate. The resulting precipitate was re-dispersed ultrasonically with water (30 mL), and centrifuged again to obtain the precipitate. After repeating the above ultrasonic dispersion and centrifugation operations three times, the palladium-loaded ultrathin metal organic framework nanosheets were obtained.

[0038] The experimental test results are as follows:

[0039] Such as figure 1 Shown is the transmission electron microscope image of the prepared palladium-loaded ultra-thin metal-organic framework nanosheets. It can be seen from the figure that the palladium particles are...

Embodiment 3

[0042] In a 500mL round-bottom flask, add ultra-thin metal-organic framework nanosheets (500mg) and water (250mL), and disperse them by ultrasonication for 30min to obtain an ultra-thin metal-organic framework nanosheet dispersion. Potassium chloropalladate (326 mg, 1 mmol) was added to the dispersion, and reacted at 30°C for 5 hours. After the reaction, centrifuge (3000rpm, 30min) to obtain a precipitate. The resulting precipitate was re-dispersed ultrasonically with water (30 mL), and centrifuged again to obtain the precipitate. After repeating the above ultrasonic dispersion and centrifugation operations three times, the palladium-loaded ultrathin metal organic framework nanosheets were obtained.

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Abstract

The invention discloses a palladium-loaded ferrocene-based ultrathin metal organic frame nanometer sheet and a preparation method thereof. The palladium-loaded ferrocene-based ultrathin metal organicframe nanometer sheet is formed by loading a ferrocene-based ultrathin metal organic frame nanometer sheet with palladium; the ferrocene-based ultrathin metal organic frame nanometer sheet is preparedfrom an organic ligand 1,1'-ferrocene diformic acid, metal salt zirconium tetrachloride and modulator acid; the ferrocene-based ultrathin metal organic frame nanometer sheet and water are added intoa reaction container, and ultrathin metal organic frame nanometer sheet dispersing liquid is obtained ultrasonically; and a precursor of the palladium is added into the ultrathin metal organic frame nanometer sheet dispersing liquid, and a reaction is conducted for a period of time at a certain temperature to obtain the palladium-loaded ferrocene-based ultrathin metal organic frame nanometer sheet. The preparation method is simple, green and environmentally-friendly; and the obtained palladium-loaded ferrocene-based ultrathin metal organic frame nanometer sheet has a porous structure, stable chemical properties and important application prospects in the field of heterogeneous catalysis.

Description

technical field [0001] The invention belongs to the field of material chemistry, and relates to a metal-loaded organic framework nanosheet and a preparation method thereof, in particular to a palladium-loaded ferrocene-based ultrathin metal-organic framework nanosheet and a preparation method thereof. Background technique [0002] Ultrathin metal-organic framework nanosheets have ultrathin thickness and large lateral dimensions. These characteristics make the ultrathin metal-organic framework nanosheets have more exposed active sites, which are very suitable as the carrier of metal nanoparticles and play an important role in the field of heterogeneous catalysis. [0003] Currently, loading metal nanoparticles onto metal-organic framework nanosheets mainly requires two steps. First, metal precursors are adsorbed onto metal-organic framework nanosheets. Then, a reducing agent (such as sodium borohydride and hydrogen, etc.) was added to reduce the metal precursors to the corr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22C07C15/073C07C5/03
CPCB01J31/2239B01J31/2295B01J2231/645B01J2531/48B01J2531/842C07C5/03C07C2531/22C07C15/073
Inventor 俞豪杰邓正王立
Owner ZHEJIANG UNIV
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