Foam copper-supported porous copper oxide nanowire composite material and preparation method and application thereof

Abstract

The invention discloses a foam copper-supported porous copper oxide nanowire composite material. The material comprises a foam copper substrate and a copper oxide nanowire supported on the surface, wherein the copper oxide nanowires are 8 to 12 mum in lengths, and are 150 to 250 nanometers in widths; the nanowires do not crack or fall easily; microscopically, the nanowires have porous structures, and pore diameters are 2 to 4 nanometers; macroscopically, the nanowires are distributed radially, and every 60 to 150 nanowires constitute a copper oxide micro-flower. The obtained composite material has a multi-grade and porous structure, and the whole three-dimensional structure is rich in apertures which are suitable for the permission of light rays and ion transport. When the composite material is taken as a photocatalytic degradation organic dye, the degradation efficiency can be increased by over 10 times; when the composite material is taken as a negative electrode material of a lithium ion battery, the capacity retention ratio can be increased by over 30 percent.

Description

technical field [0001] The invention relates to the technical field of copper oxide materials, in particular to a porous copper oxide nanowire supported by foamed copper, a preparation method and application thereof. Background technique [0002] Copper oxide is a p-type semiconductor material with a narrow band gap of about 1.2eV and good electrochemical activity. It has been used in ceramics, glazes and enamel, petroleum desulfurizers, pesticides, hydrogen production, green glass, etc. It has played a huge role in the field and has shown attractive application potential in photocatalytic degradation of organic dyes and as anode materials for lithium-ion batteries. [0003] In the prior art, CN106115763A discloses a method for preparing copper oxide spherical grade structure materials. The product prepared by this method is copper oxide nanopowder, which needs to be calcined at 400-600°C during the preparation process, which consumes a lot of energy and increases the costs...

AI Technical Summary

Problems solved by technology

Before the powder sample is used to catalyze the degradation of organic dyes, the solution needs to be stirred for 30 minutes in the dark to allow the material to reach adsorption equilibrium before performing light experiments. The material processing process is relatively complicated.

Powder samples are not easy to collect after application, which can easily cause secondary pollution and increase the complexity of the post-processing process

CN104925846A discloses a preparation method of nano-copper oxide and its application in lithium batteries. The nano-copper oxide powder obtained by this method cannot be directly used as the negative electrode material of lithium-ion batteries, and it needs to be added with a conductive agent, a binder and mixed uniformly. , coated on the current collector, and then used after drying, thus increasing the production cycle and the cost of preparation

CN105514406A discloses a preparation method of copper oxide nanowire array at room temperature, which requires the use of high-quality concentration (28%) ammonia water to participate in the reaction, and the reaction time is 96 hours. This process condition has potential threats to the environment and workers’ health. And the process time is long, not suitable for rapid large-scale production

In addition, the patent uses copper sheets as substrates to grow copper oxide nanowire arrays on the surface of copper sheets and apply them to the negative electrode of lithium-ion batteries. Since the copper sheet substrate itself has no porous structure, the adequacy of the reaction is reduced and the lithium ion battery is increased. The transmission distance between ions and the internal nanowires, and after many cycles, the nanowires are easy to coarsen and merge, which makes the battery performance attenuate

The paper Scientific Reports 2015, 5: 16115 discloses a method of growing copper oxide nanowires on the surface of porous metal copper by combining anodic oxidation and calcination. -2 The copper foam was anodized for 30 minutes at a certain current density, and then calcined at 180°C for 1 hour to obtain a copper oxide nanowire composite material based on copper foam. The copper oxide nanowires synthesized by this method are relatively thick, with a diameter of about 450nm , there is no finer nanoscale hole structure on the nanowire, which will affect the performance and efficiency of the material as a photocatalytic degradation agent and lithium-ion battery anode material, and the surface of the prepared copper oxide wire is cracked after calcination, which affects its mechanical integrity

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