Preparing method for three dimensional bacterial cellulose-derived carbon nano fiber/metal particle composite aerogel

A technology of bacterial cellulose and carbon nanofibers, applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve problems such as uneven loading of metal particles, and achieve controllable loading and uniform distribution , Environmentally friendly effect

Inactive Publication Date: 2014-09-24
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing a three-dimensional carbon nanofiber / metal particle composite aerogel in order to solve the problems in the prior art that the metal particles are loaded unevenly on the nanofibers and the composite material is a two-dimensional structure

Method used

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  • Preparing method for three dimensional bacterial cellulose-derived carbon nano fiber/metal particle composite aerogel
  • Preparing method for three dimensional bacterial cellulose-derived carbon nano fiber/metal particle composite aerogel
  • Preparing method for three dimensional bacterial cellulose-derived carbon nano fiber/metal particle composite aerogel

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Effect test

Embodiment 1

[0026] 1), cut the bacterial cellulose hydrogel into rectangles (1*4*2cm 3 ), immersed in 0.2M cobalt chloride solution for 12h, heated to 90°C in a water bath, and kept for 2h; then the hydrogel was transferred to 1M sodium hydroxide solution at 90°C for 3h, and after natural cooling Rinse thoroughly with deionized water until neutral. The resulting composite hydrogel was frozen by immersion in liquid nitrogen, and then vacuum freeze-dried.

[0027] 2) The product obtained in step 1 was pyrolyzed at 900° C. for 2 hours under a nitrogen atmosphere, and cooled naturally to obtain a three-dimensional bacterial cellulose-derived carbon nanofiber / cobalt composite airgel.

[0028] The prepared product is a macroscopic three-dimensional bulk material, such as figure 1 Shown; The three-dimensional composite airgel has a porous network cross-linked structure, the diameter of carbon nanofibers is about 30-50nm, and the cobalt nanospheres with a particle diameter of about 100nm are un...

Embodiment 2

[0030] 1), cut the bacterial cellulose hydrogel into rectangles (1*2*2cm 3 ), soaked in 0.1M cobalt acetate solution for 8h, heated to 85°C in a water bath, and kept for 2h, then transferred the hydrogel to 90°C 1M potassium hydroxide solution for 6h, cooled naturally and used Rinse thoroughly with deionized water until neutral. The resulting composite hydrogel was frozen by immersion in liquid nitrogen, and then vacuum freeze-dried.

[0031] 2) The product obtained in step 1 was pyrolyzed at 800° C. for 2 hours in an argon atmosphere, and cooled naturally to obtain a three-dimensional bacterial cellulose-derived carbon nanofiber / cobalt composite airgel.

[0032] The prepared composite airgel is also a block structure. The airgel maintains a three-dimensional porous network structure and has randomly distributed macropores and mesopores. The cobalt nanospheres are tightly loaded on the carbon nanofibers and distributed uniformly. The diameter of the cobalt nanospheres is sli...

Embodiment 3

[0034] 1), cut the bacterial cellulose hydrogel into rectangles (1*4*2cm 3 ), immersed in 0.2M ferrous sulfate solution for 12h, heated to 90°C in a water bath, and kept for 2h, then transferred the hydrogel to 1M sodium bicarbonate solution at 80°C for 3h, and cooled naturally Rinse thoroughly with deionized water until neutral. The resulting composite hydrogel was frozen by immersion in liquid nitrogen, and then vacuum freeze-dried.

[0035] 2) The product obtained in step 1 was pyrolyzed at 900° C. for 2 hours under an argon atmosphere, and cooled naturally to obtain a three-dimensional bacterial cellulose-derived carbon nanofiber / iron composite airgel.

[0036] The prepared three-dimensional bacterial cellulose-derived carbon nanofiber / iron composite airgel is also a bulk material, in which the intercrosslinked carbon nanofibers are interlinked to form a three-dimensional porous network structure, and the iron nanospheres are uniformly loaded on the carbon on nanofibers,...

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Abstract

The invention relates to a preparing method for a three dimensional bacterial cellulose-derived carbon nano fiber/metal particle composite aerogel and belongs to the field of a carbon nano fiber/metal composite nano material. The preparing method comprises the steps of firstly dipping bacterial cellulose aquogel into a metal salt solution for water heating, then moving into an alkaline solution to obtain a bacterial cellulose/metal hydroxide or oxyhydroxide compound by thermal sedimentation, and then obtaining the bacterial cellulose-derived carbon nano fiber load metal nano particle composite aerogel by high temperature cracking. The preparing method has the advantages of simple preparing process, environment friendliness, capability of large-scale preparing and the like. In addition, the three dimensional material prepared by the method has a porous network structure and good conductivity, metal particles are uniformly loaded on carbon nano fibers, and the preparing method has broad application prospect in the application such as photoelectric catalysis, electrochemistry and heavy metal ion adsorption.

Description

technical field [0001] The invention relates to a preparation method of a three-dimensional bacterial cellulose-derived carbon nanofiber / metal particle composite airgel, belonging to the field of carbon nanofiber / metal composite nanomaterials. Background technique [0002] Transition metals iron, cobalt and their compounds have been widely studied in applications such as photoelectrocatalysis, electrochemistry, and heterogeneous catalysis due to their abundant natural reserves and high theoretical activity. Iron and cobalt oxide nanoparticles are often loaded on other carriers (such as carbon nanomaterials) as composite nanomaterials because of their relatively low electrical conductivity and high surface energy, which cause easy agglomeration. [0003] Bacterial cellulose is a low-cost, environmentally friendly biomass material that can be produced on a large scale through bacterial fermentation. Bacterial cellulose hydrogel is formed by cross-linking a large number of bac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B82Y30/00B82Y40/00
Inventor 刘婷曹国林
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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