Supermolecule hybridized hydrogel, graphene aerogel, preparation methods and application of two

A graphene aerogel and hydrogel technology, applied in the field of electrochemistry, can solve the problems of poor electrical conductivity and related stability, reduced specific surface area, limitation, etc., and achieve the effects of low cost, good contact, and stable strength

Active Publication Date: 2015-04-01
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

This patented new type of compound called hydrogels made from molecules containing metal atoms or other materials have many benefits such as being able to change their shape when exposed to different temperatures (temperature range) and having excellent conductivity characteristics at room temperature. These gels also exhibit high stability over time without losing any significant amount of activity due to chemical reactions occurring during manufacturing processes. Additionally, these types of composites may include various substances added through impregnation techniques like immersion into liquid solutions. Overall, this patents provides technical means for creation of highly effective sensors used in fields related to energy generation and storage technologies.

Problems solved by technology

Technologies described in the technical problem addressed in this patents involve improving the catalysability and durable life of noble metal based composite structures called palladiums, particularly those containing transition elements. These new catalyzings aim towards enhanced catalysis capabilities without compromising certain characteristics associated with conventional catalyst layers.

Method used

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  • Supermolecule hybridized hydrogel, graphene aerogel, preparation methods and application of two
  • Supermolecule hybridized hydrogel, graphene aerogel, preparation methods and application of two
  • Supermolecule hybridized hydrogel, graphene aerogel, preparation methods and application of two

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Embodiment 1

[0038] A supramolecular hybrid hydrogel of the present invention, the supramolecular hybrid hydrogel is a three-dimensional network structure, composed of ferrocene-phenylalanine gel factor (Fc-Phe-OH) and a thickness of about 1nm ultrathin graphene oxide was co-assembled through non-covalent bonds.

[0039] The preparation method of the supramolecular hybrid hydrogel of the present embodiment comprises the following steps: the preparation of graphene oxide is to use natural flake graphite as raw material, adopting the improved Hummers method (J. Am. Chem. Soc.1958, 80 (6) 1339-1339; Journal of Materials Chemistry, 2011, 21 (10) 3335-3345.): mix 2.0g of natural graphite and 1.0g of sodium nitrate, add 50ml of concentrated sulfuric acid (98%) under stirring, ice bath The reaction was stirred for 1 h, and then 6.0 g of potassium permanganate was slowly added, and the reaction was continued for 2 h under ice bath, and the mixture was heated to 35 °C for 2 h. Slowly add 120ml of ...

Embodiment 2

[0046] A supramolecular hybrid hydrogel of the present invention has a three-dimensional network structure, which is composed of ferrocene-diphenylalanine gelling factor (Fc-Phe-Phe-OH) and Ultrathin graphene oxide with a thickness of about 1.5 nm is obtained by non-covalent co-assembly.

[0047] The preparation method of the supramolecular hybrid hydrogel of the present embodiment includes the following steps: the preparation of graphene oxide takes natural flake graphite as a raw material, and adopts the improved Hummers method (J. Am. Chem. Soc. 1958, 80(6) 1339-1339; Journal of Materials Chemistry, 2011, 21(10) 3335-3345.). Adjust the pH of the graphene oxide aqueous solution to alkaline (pH=10.0) with phosphate buffered saline; add 24 mg of ferrocene-diphenylalanine powder to a centrifuge tube, add 200 μL of dimethyl sulfoxide to dissolve, and sonicate 1 min to prepare a stock solution with a concentration of 120 mg mL ?1 ; Add the stock solution to the phosphate buffer...

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Abstract

The invention provides supermolecule hybridized hydrogel, graphene aerogel, preparation methods and application of the two. The hydrogel has a three-dimension network structure, and is obtained by assembling ferrocene-amino acid gel factor and oxidized graphene through a noncovalent bond. The supermolecule hybridized hydrogel has a high-intensity and stable current signal and good electrical properties, and is applicable to fields of trace detection devices and biosensors. The graphene aerogel is obtained by utilizing the above supermolecule hybridized hydrogel through an in-situ synthetic method, and comprises a Fe3O4 nanoparticle and nitrogen-doped three-dimension graphene. The provided Fe3O4/nitrogen-doped graphene aerogel has substantial electrocatalytic effect on oxygen reduction reactions, and has the catalytic current density up to 3 mA*cm<-2>, and the synthetic method is simple and low in cost, and is capable of providing powerful guidance for fuel cell production technologies.

Description

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Claims

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Application Information

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Owner CENT SOUTH UNIV
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