Supported noble metal nanoparticle composite material and preparation method thereof

A nanoparticle and composite material technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of poor uniformity of metal nanoparticles, wide particle size distribution range, harsh reaction conditions, etc. Achieve the effects of stable combination, narrow distribution range and simple preparation method

Active Publication Date: 2017-07-04
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods are cumbersome and costly to prepare, and the reaction conditions are harsh, and the metal nanoparticles in the obtained products generally have problems of poor uniformity, wide particle size distribution range, and agglomeration between nanoparticles.

Method used

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  • Supported noble metal nanoparticle composite material and preparation method thereof
  • Supported noble metal nanoparticle composite material and preparation method thereof
  • Supported noble metal nanoparticle composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] First, according to the literature (Li, H.; Ma, H.; Wang, X.; Gao, J.; Chen, C.; Shi, S.; Qu, M.; Feng, N.; Xu, J. Journal of Energy Chemistry 2014,23,742) ZIF-67 was prepared. Weigh 20 mg of ZIF-67 powder, dissolve it in 10 ml of methanol, and dissolve it ultrasonically for 10 minutes to obtain a purple suspension system. Prepare 50mM chloropalladium acid aqueous solution. Use a pipette to transfer 300 μL of the chloropalladium acid aqueous solution, slowly drop it into the ZIF-67 methanol solution system (that is, the purple suspension system described above), and stir for 6 hours to complete the immersion process. Weigh 7.2 mg of sodium borohydride, dissolve it in 1 ml of cooled methanol, dissolve it ultrasonically for 10 seconds, and add the obtained dispersion to the impregnation system after the impregnation, and the system changes from purple to black. Continue stirring for 1 h, then centrifuge at 8000 rpm for 10 min, separate the clear liquid, and wash it repea...

Embodiment 2

[0064] ZIF-67 was prepared by the same method as in Example 1. Weigh 20 mg of ZIF-67 powder, dissolve it in 10 ml of methanol, and dissolve it ultrasonically for 10 minutes to obtain a purple suspension system. Prepare 50mM chloroplatinic acid aqueous solution. Use a pipette to transfer 300 μL of the chloroplatinic acid aqueous solution, slowly drop it into the ZIF-67 methanol solution system (that is, the purple suspension system described above), and stir for 6 hours to complete the immersion process. Weigh 7.2 mg of sodium borohydride, dissolve it in 1 ml of cooled methanol, dissolve it ultrasonically for 10 seconds, and add the obtained dispersion to the impregnation system after the impregnation, and the system changes from purple to black. Continue stirring for 1 h, then centrifuge at 8000 rpm for 10 min, separate the clear liquid, and wash it repeatedly with methanol 3 times. The samples were dried at room temperature and protected from light for 12 hours to obtain a Z...

Embodiment 3

[0068] First, ZIF-67 was prepared by the same method as in Example 1. Weigh 20 mg of ZIF-67 powder, dissolve it in 10 ml of methanol, and dissolve it ultrasonically for 10 minutes to obtain a purple suspension system. Prepare 50mM chloroauric acid aqueous solution. Use a pipette to transfer 300 μL of the chloroauric acid aqueous solution, slowly drop it into the ZIF-67 methanol solution system (that is, the purple suspension system described above), and stir for 6 hours to complete the immersion process. Weigh 7.2 mg of sodium borohydride, dissolve it in 1 ml of cooled methanol, dissolve it ultrasonically for 10 seconds, and add the obtained dispersion to the impregnation system after the impregnation, and the system changes from purple to black. Continue stirring for 1 h, then centrifuge at 8000 rpm for 10 min, separate the clear liquid, and wash it repeatedly with methanol 3 times. The samples were dried at room temperature and protected from light for 12 hours to obtain a ...

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Abstract

The invention discloses a supported noble metal nanoparticle composite material and a preparation method thereof, and in particular, relates to a stable-chemical-property metal organic framework supported noble metal nanoparticle composite material and a preparation method thereof. Noble metal nanoparticles in the composite material have uniform particle size and narrow distribution range, and have the particle size in the range of 3 to 4 nm. An inorganic noble metal acid is used as a precursor, a metal organic framework which has stable chemical properties and cannot be corroded by an inorganic noble metal acid aqueous solution in the preparation process is selected as a carrier, a specific wet impregnation and in-situ reduction method is combined, and thus the composite material is obtained. The method has the advantages of simple and fast operation and mild conditions, an exposed crystal face of the noble metal nanoparticles in the obtained composite can be controlled to be a face-centered cubic fcc (111) crystal face, and the application prospects are wide.

Description

Technical field [0001] The invention belongs to the field of nanoparticle preparation, and relates to a supported precious metal nanoparticle composite material and a preparation method thereof, in particular to a metal organic framework supported precious metal nanoparticle composite material, and a metal organic framework with stable chemical properties as a carrier and inorganic Precious metal acid is the precursor, and the composite material is prepared simply and quickly by dipping and in-situ reduction method. Background technique [0002] Metal Organic Frameworks (MOF) is a kind of metal organic framework structure material with high specific surface area, ordered porosity, certain chemical and thermal stability. As a novel material, it has been widely studied in recent years and its main application For separation, energy storage, drug delivery, catalysis and other fields. Among them, ZIF-67, as a zeolite-type MOF, has received extensive attention in the field of materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D233/58B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C07D233/58
Inventor 佟勇德刘美李国栋刘薇唐智勇
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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