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Method for preparing in-situ grapheme-coated metal oxide nanoflower structure on metal substrate

A graphene-wrapped, metal-based technology, applied in the field of materials

Active Publication Date: 2019-07-09
WENZHOU UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But how to combine this substrate-grown graphene with CuO, which is less conductive, remains challenging.

Method used

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  • Method for preparing in-situ grapheme-coated metal oxide nanoflower structure on metal substrate
  • Method for preparing in-situ grapheme-coated metal oxide nanoflower structure on metal substrate
  • Method for preparing in-situ grapheme-coated metal oxide nanoflower structure on metal substrate

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Embodiment

[0037] A preparation method for growing CuO nanoflowers on foamed copper. The method uses chemical vapor deposition (CVD) to grow graphene, then electrochemically grows HKUST-1, and uses lye soaking method to convert HKUST-1 to CuO Nanoparticles, the target product graphene-wrapped CuO nanoflower is finally obtained by the voltage pulse lye immersion method. The electrochemical OER performance test of the material prepared by the present invention shows that the target product has an overpotential of up to 10mA cm-1 at a current density of 10mA cm-1. 323mv, that is, the material has excellent OER catalytic activity. The preparation method includes the following steps:

[0038] ① Pretreatment of foamed copper substrate. Cut the foamed copper into 1 mm2, soak it in 10% acetic acid for 10 minutes to remove the oxide layer on the surface, wash it with pure water, and dry it with nitrogen for use. Furnace temperature is 40℃min -1 The heating rate was increased to 300°C and oxidized ...

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Abstract

The invention discloses a method for preparing an in-situ graphene-coated metal oxide nanoflower structure on a metal substrate, wherein the metal substrate comprises a copper base or a nickel base. The method comprises the following specific operation steps: (1) preprocessing a metal substrate, dividing the metal substrate into small blocks, and removing an oxide layer on the surface of the metalsubstrate; and (2) growing large-area continuous uniform graphene on the metal substrate; (3) gluing the metal substrate, conducting drying, etching off a part of metal to separate the graphene fromthe metal substrate, conducting electrolyzing and conducting soaking in a concentrated alkali solution to convert the metal substrate into metal oxide nanoparticles, and removing glue on the grapheneto form a grapheme-coated copper oxide particle structure; and (4) finally, carrying out pulse under voltage, and conducting soaking in concentrated alkali solution to convert the metal oxide particles into metal oxide nanoflowers, and finally to form the structure of graphene-coated metal oxide nanoflowers.

Description

Technical field [0001] The invention relates to the technical field of materials, in particular to a method for preparing an in-situ graphene-coated metal oxide nanoflower structure on a metal substrate. Background technique [0002] CuO is an important p-type transition metal oxide semiconductor with a narrow band gap of (Eg) 1.2 eV. It has a wide range of applications in electrical, optical and photovoltaic device manufacturing, electrode material manufacturing and other fields. In addition, due to its high electrocatalytic activity possessed by transition metal oxides, it has also received extensive attention in the field of electrocatalysis. These applications mainly depend on the morphology of CuO. So far, various CuO nanostructures have been synthesized using various manufacturing techniques, including nanorods, nanowires, nanotubes, nanosheets, nanobelts and other CuO nanostructures with various morphologies. In addition, there are some complex CuO nanostructures, such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/186C01G3/02
CPCC01B32/186C01G3/02C01P2002/72C01P2004/03C01P2004/30C01P2004/61C01P2004/62C01P2006/40C01B2204/22
Inventor 胡悦王赢钱金杰黄少铭
Owner WENZHOU UNIVERSITY
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