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A kind of preparation method of multifunctional doped carbon nanofiber airgel

A carbon nanofiber and aerogel technology, applied in the direction of nanocarbon, nanotechnology, nanotechnology, etc., can solve problems such as carcinogenic toxicity, aquatic organisms and human threats, and achieve simple methods, easy large-scale production, and reduce environmental pollution. pollution effect

Active Publication Date: 2015-11-25
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Certain dyes and their degraded derivatives are potentially carcinogenic and toxic, and their presence in water poses a serious threat to aquatic life and humans

Method used

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  • A kind of preparation method of multifunctional doped carbon nanofiber airgel
  • A kind of preparation method of multifunctional doped carbon nanofiber airgel
  • A kind of preparation method of multifunctional doped carbon nanofiber airgel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The preparation method of the present embodiment multifunctional doped carbon nanofiber airgel is carried out according to the following steps:

[0030] a. Take a commercially purchased 320×240×12mm 3 Bacterial cellulose large pieces, soaked in deionized water for 5 days to remove acid, and change the deionized water every day to obtain spare bacterial cellulose;

[0031] b. Cut the large piece of bacterial cellulose after deacidification into 50×20×12mm 3 The small piece of, then in the methylene blue solution that concentration is 1g / L soaks 3 days, obtains dyestuff / bacterial cellulose;

[0032] c. Use liquid nitrogen to freeze the dye / bacterial cellulose for 25 minutes, and then dry the frozen dye / bacterial cellulose in a freeze dryer for 4 days (the drying temperature is -50°C and the pressure is 0.04mbar) to obtain the dye / bacterial cellulose Hybrid airgel;

[0033] d. Place the dye / bacterial cellulose hybrid airgel in a ceramic boat, and then transfer it to a t...

Embodiment 2

[0041] The preparation method of the present embodiment multifunctional doped carbon nanofiber airgel is carried out according to the following steps:

[0042] a. Take a commercially purchased 320×240×12mm 3 Bacterial cellulose large pieces, soaked in deionized water for 5 days to remove acid, and change the deionized water every day to obtain spare bacterial cellulose;

[0043] b. Cut the large piece of bacterial cellulose after deacidification into 50×20×12mm 3 The small pieces of the cellulose are soaked in the methylene blue solution of 1g / L for 7 days to obtain the dye / bacterial cellulose;

[0044] c. Use liquid nitrogen to freeze the dye / bacterial cellulose for 25 minutes, and then dry the frozen dye / bacterial cellulose in a freeze dryer for 5 days (the drying temperature is -50°C and the pressure is 0.04mbar) to obtain the dye / bacterial cellulose Hybrid airgel;

[0045] d. Place the dye / bacterial cellulose hybrid airgel in a ceramic boat, and then transfer it to a tu...

Embodiment 3

[0050] The preparation method of the present embodiment multifunctional doped carbon nanofiber airgel is carried out according to the following steps:

[0051] a. Take a commercially purchased 320×240×12mm 3 Bacterial cellulose large pieces, soaked in deionized water for 5 days to remove acid, and change the deionized water every day to obtain spare bacterial cellulose;

[0052] b. Cut the large piece of bacterial cellulose after deacidification into 50×20×12mm 3 The small pieces of the cellulose are soaked in the rhodamine B solution of 3g / L for 5 days to obtain the dyestuff / bacterial cellulose;

[0053] c. Use liquid nitrogen to freeze the dye / bacterial cellulose for 25 minutes, then dry the frozen dye / bacterial cellulose in a freeze dryer for 5 days to obtain a dye / bacterial cellulose hybrid airgel;

[0054] d. Place the dye / bacterial cellulose hybrid airgel in a ceramic boat, and then transfer it to a tube furnace; feed nitrogen into the tube furnace as a protective gas,...

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Abstract

The invention discloses a preparation method for multifunctional carbon nanofiber-doped aerogel. The preparation method is characterized by comprising the following steps: soaking disacidified bacterial cellulose in an organic dye solution until the bacterial cellulose becomes saturated after absorption; then carrying out freeze drying; and then carrying out high-temperature pyrolysis so as to obtain the multifunctional carbon nanofiber-doped aerogel. According to the invention, dye molecules and bacterial cellulose are used as precursors for preparation of the multifunctional carbon nanofiber-doped aerogel; the method is simple, uses cheap and easily available raw materials and can easily realize large-scale production; and the prepared multifunctional carbon nanofiber-doped aerogel can be used both as a stable and high-efficiency catalyst for an oxygen reduction reaction of a fuel cell and as an electrode material for a supercapacitor.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and in particular relates to a preparation method of a multifunctional doped carbon nanofiber aerogel. Background technique [0002] High-performance, low-cost, environmentally friendly heteroatom (nitrogen, boron, phosphorus, sulfur, etc.) doped carbon nanomaterials in the field of electrochemical energy storage and conversion, such as fuel cells, dye-sensitized cells, solar cells, lithium-ion batteries , There is a huge application prospect in supercapacitors. For example, doped carbon nanomaterials as electrocatalysts for the oxygen reduction reaction in fuel cells can overcome some inherent disadvantages of traditional platinum or palladium-based catalysts such as high cost, limited supply, cross-deactivation, and poor durability. On the other hand, when used as supercapacitor electrode materials, doped carbon nanomaterials exhibit excellent capacitive properties (such as large electro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02B82Y30/00C01B32/15
Inventor 俞书宏吴振禹胡必成
Owner UNIV OF SCI & TECH OF CHINA