Preparation and application of graphene/zinc oxide nanowire array/three-dimensional foam graphene composite material

A zinc oxide nanowire, foamed graphene technology, applied in the direction of zinc oxide/zinc hydroxide, graphene, nano carbon, etc., can solve the problems of limited application, low conductivity of zinc oxide nanowires, reduced sensitivity and stability, etc. , to achieve the effect of direct biocompatibility, improved electrochemical performance, and excellent electrical conductivity

Inactive Publication Date: 2017-05-10
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the high isoelectric point (9.5) of ZnO nanowires, biomolecules can be adsorbed to reduce their sensitivity and stability.
In addition, the low electrical conductivity of ZnO nanowires limits its application to some extent.

Method used

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  • Preparation and application of graphene/zinc oxide nanowire array/three-dimensional foam graphene composite material
  • Preparation and application of graphene/zinc oxide nanowire array/three-dimensional foam graphene composite material
  • Preparation and application of graphene/zinc oxide nanowire array/three-dimensional foam graphene composite material

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specific Embodiment approach 1

[0027] Specific embodiment one: the preparation method of a kind of graphene / zinc oxide nanowire array / three-dimensional foamed graphene composite material in the present embodiment is specifically carried out according to the following steps:

[0028] 1. Chemical Vapor Deposition

[0029]1) Place nickel foam in the center of a quartz tube furnace, and heat it from room temperature at a rate of 10 ℃ / min to 30 ℃ / min under the protection of argon and hydrogen to a temperature of 900 ℃ to 1200 ℃, and at a temperature of Keep warm for 30 min to 60 min under the condition of 900 ℃ to 1200 ℃, and then feed methane gas into the tube furnace at a rate of 5 sccm to 10 sccm for 5 min to 20 min at a temperature of 900 ℃ to 1200 ℃, and then Cool the quartz tube furnace from a temperature of 900 °C to 1200 °C to room temperature at a cooling rate of 70 °C / min~90 °C / min to obtain a nickel foam coated with graphene; the nickel foam described in step 1 1) Density is 420 g / m 2 ~440 g / m 2 , ...

specific Embodiment approach 2

[0041] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1 1), nickel foam is placed in the center of the quartz tube furnace, and it is heated from room temperature at 20 ℃ / min~40 under the protection of argon and hydrogen. The heating rate of ℃ / min is heated to a temperature of 1000 ℃ ~ 1100 ℃, and the temperature is kept at 1000 ℃ ~ 1100 ℃ for 40 min ~ 50 min, and the temperature is 1000 ℃ ~ 1100 ℃ Methane gas was introduced at a rate of 7 sccm~9 sccm for 10min~15 min, and then the quartz tube furnace was cooled from 1000 ℃ to 1100 ℃ to room temperature at a cooling rate of 80 ℃ / min~100 ℃ / min to obtain Nickel foam coated with graphene; the nickel foam described in step 1) has a density of 425 g / m 2 ~435 g / m 2 , the thickness is 1.6 mm~2.0 mm; the flow rate of argon gas in Step 1 1) is 480 sccm, and the flow rate of hydrogen gas is 180 sccm; the others are the same as in Embodiment 1.

specific Embodiment approach 3

[0042] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that in step 1 2), polymethyl methacrylate is dissolved in ethyl lactate, and the temperature is 90 ℃ ~ 110 ℃. Heat and stir for 1 h to 2 h to obtain a mixed solution, and use a sample gun to add the mixed solution dropwise to the surface of the nickel foam wrapped in graphene obtained in step 1) at an amount of 120 μL to 180 μL per square centimeter. Naturally dry at room temperature, and then keep warm for 0.5 h to 1 h at a temperature of 150 ° C to 200 ° C to obtain foamed graphene coated with polymethyl methacrylate; in the mixed solution described in step 1 2) The mass fraction of methyl methacrylate is 4%~5%; Others are the same as one of the specific embodiment 1 or 2.

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Abstract

The invention provides preparation and application of a graphene/zinc oxide nanowire array/three-dimensional foam graphene composite material, relates to a preparation method and an application of a composite material and aims to solve the problem of lower folic acid detection sensitivity of an existing material in a biosensor. The preparation method comprises steps as follows: 1, a chemical vapor deposition method; 2, a hydrothermal synthesis method. The graphene/zinc oxide nanowire array/three-dimensional foam graphene has the characteristics of large specific surface area, excellent electric conductivity and the like. The invention is mainly applied to preparation of the graphene/zinc oxide nanowire array/three-dimensional foam graphene composite material.

Description

technical field [0001] The invention relates to a preparation method and application of a graphene / zinc oxide nanowire array / three-dimensional foamed graphene composite material. Background technique [0002] Graphene (Gr) is a single layer of carbon atoms with sp 2 The two-dimensional material formed by the combination of hybrid orbitals has excellent optical transparency, chemical stability, electrical conductivity and mechanical properties. Widely used in electronics, optics, biomedicine, sensors, supercapacitors. At present, the preparation methods of graphene mainly include: mechanical exfoliation method, chemical vapor deposition method and reduced graphene oxide method. Among them, the chemical vapor deposition method can use a foamed nickel template with a three-dimensional structure to prepare a three-dimensional foamed graphene (GF) with the same structure and shape as the template. Three-dimensional foamed graphene has a three-dimensional interconnected network...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02C01B32/186C01B32/194G01N27/26B82Y30/00
CPCB82Y30/00C01G9/02C01P2002/72C01P2002/85C01P2004/03C01P2004/80G01N27/26
Inventor 岳红彦林轩宇高鑫王宝姚龙辉郭二军宋姗姗张宏杰关恩昊
Owner HARBIN UNIV OF SCI & TECH
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