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Composite material of natural plant nano-fibers and metal nano-particles and preparation method thereof

A technology of metal nanoparticles and nanofibers, which is applied in the fields of plant fibers, botanical equipment and methods, nanotechnology for materials and surface science, etc., to achieve the effects of good catalytic activity, concise synthesis route, and simple route.

Active Publication Date: 2012-05-23
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of natural plant nanofibers to reduce metal nanoparticles has not been reported so far

Method used

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  • Composite material of natural plant nano-fibers and metal nano-particles and preparation method thereof
  • Composite material of natural plant nano-fibers and metal nano-particles and preparation method thereof
  • Composite material of natural plant nano-fibers and metal nano-particles and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] In a 50ml one-mouth bottle, add 20ml of a suspension containing nanofibers of natural cypress (the nanofibers of natural cypress are placed in water and obtained by ultrasonic dispersion) and 10 μl of suspension containing AgNO 3 The aqueous solution obtains the mixed solution, the nanofiber of the natural cypress that contains mass fraction in the mixed solution is 0.05%, the AgNO of 0.01M 3 . Then the one-mouth bottle was placed in a water bath at 100° C. for 30 minutes to react, and the reaction product was centrifuged and freeze-dried to obtain a composite material with silver nanoparticles uniformly arranged on the surface of the nanofibers of natural cypress.

[0049] The transmission electron microscope (TEM) photograph of the nanofiber of above-mentioned natural cypress is as figure 1 As shown, it can be seen that the nanofibers of natural cypress have a diameter of 2 nm to 100 nm and a length of 1 μm to 100 μm. The resulting transmission electron microscope (...

Embodiment 2

[0051] In a 50ml one-port bottle, add 20ml of the suspension containing the nanofibers of natural cypress and the nanofibers of cedar (the nanofibers of natural cypress and the nanofibers of cedar are placed in water and obtained after ultrasonic dispersion) and 5ml containing HAuCl 4 The aqueous solution obtains mixed solution, and the mixed solution containing the nanofiber (the weight ratio of both is 1: 1) that the nanofiber of the natural cypress of 0.1% and the nanofiber of cedar tree mixes in the mixed solution, the HAuCl of 0.01M 4 . Then react at room temperature for 30 minutes, centrifuge the reaction product, and freeze-dry to obtain a composite material in which gold nanoparticles are uniformly arranged on the surface of nanofibers mixed with natural cypress nanofibers and cedar nanofibers.

[0052] The transmission electron microscope (TEM) photograph of the composite material loaded with gold nanoparticles evenly arranged on the surface of the nanofibers of natu...

Embodiment 3

[0054] In a 50ml single-mouth bottle, add 20ml of a suspension containing nanofibers of natural cypress (the nanofibers of natural cypress are placed in water and obtained after ultrasonic dispersion), adjust the pH value of the suspension to 14 with sodium hydroxide, and then add 200 μl Contains HAuCl 4 The aqueous solution obtains the mixed solution, and the mixed solution contains the nanofibers of 0.1% natural cypress in the mixed solution, the HAuCl of 0.01M 4 . Then react at room temperature for 30 minutes, centrifuge the reaction product, and freeze-dry to obtain a composite material with gold nanoparticles evenly arranged on the surface of the nanofibers of natural cypress.

[0055] The resulting transmission electron microscope (TEM) photo of the composite material loaded with gold nanoparticles evenly arranged on the surface of the nanofibers of natural cypress is as follows: Figure 5 As shown, it can be seen that the gold nanoparticles are evenly distributed on t...

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Abstract

The invention, belonging to the field of functional materials prepared by using plant nano-fiber composite metal nano-particles, particularly relates to a composite material based on natural plant nano-fibers and metal nano-particles and a preparation method thereof. The preparation method comprises the following steps: putting the natural plant nano-fibers in water to prepare a suspending liquid, then adding a metal precursor for reacting, carrying out centrifugation on a product obtained by the reaction, and carrying out freeze drying to obtain the composite material uniformly loading metal nano-partilces on the surface of the natural plant nano-fibers. According to the invention, the natural plant nano-fibers are used as a reducing agent, a stabilizing agent and a template; the metal precursor is reduced in the aqueous solution; and the metal nano-particles are further reduced through one-step method by using polyhydroxy, phenolic group, carboxyl and other structures of the surface of the natural plant nano-fibers. The method does not use toxic reducing agent, solvent and organic stabilizer, and the synthetic route is simple and green.

Description

technical field [0001] The invention belongs to the field of functional materials (such as catalytic materials) prepared from plant nanofibers composited with metal nanoparticles, in particular to a composite material based on natural plants (including herbaceous plants and woody plants) nanofibers and metal nanoparticles and its preparation method. Background technique [0002] When the size of the substance is reduced to the nanometer range, it will show characteristics such as quantum effect, surface effect, and macroscopic quantum tunneling effect. Based on a variety of small size effects, nanoscale metal particles have shown excellent performance in many fields, including near-resonance nonlinear response, unique biocompatibility, unique plasmon resonance absorption characteristics and catalytic characteristics. The preparation and application of high-quality metal nanoparticles has become a research hotspot in the field of chemistry. [0003] The traditional preparat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/83B82Y30/00B82Y40/00B01J23/52A01N59/16A01P1/00D06M101/04
Inventor 吴敏黄勇蔺晓博
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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