Micro-nano graded porous copper and preparation method thereof

Abstract

The invention discloses a preparation method of micro-nano graded porous copper. The preparation method is specifically implemented according to the following steps that S1, copper powder, manganese powder and sodium chloride particles are weighed according to a certain proportion and mixed uniformly; S2, the uniformly mixed powder in S1 is filled into a mold and pressed at a certain pressure, andthe pressure is maintained for a certain period of time; S3, a sample pressed in S2 is placed in a high-temperature tubular furnace, sintered at a certain heating rate, subjected to heat preservationfor a certain period of time, cooled along with the furnace and then taken out, and argon is introduced for protection in the whole process; S4, the surface of the sintered sample is polished to be bright on abrasive paper, and the sample is placed in deionized water of a constant-temperature water bath to be soaked in water; and S5, the sample soaked in water continues to be subjected to dealloying treatment with hydrochloric acid under the condition of the constant-temperature water bath, dealloying is completed when no obvious bubbles escape, and then composite porous copper with two-stagemicron-pores and single-stage nano-pores is obtained. The preparation method is beneficial for providing a larger specific surface area and improving the catalytic performance of a porous material.

Description

technical field [0001] The invention belongs to the technical field of preparation of nanoporous metal materials, and in particular relates to a micronano graded porous copper and a preparation method of the micronano graded porous copper. Background technique [0002] Due to their low density, high porosity and high specific surface area, porous materials exhibit special physical, chemical and mechanical properties, so they are widely used in many fields such as catalysis, sensing, energy, fuel cells and surface-enhanced Raman scattering. Show great application potential. Materials with hierarchical pore diameters can further improve their properties such as specific surface area and porosity, so it is very important to prepare hierarchical porous materials with uniform and controllable pore diameters. The preparation methods of micro-nano hierarchical porous metals include solid-gas eutectic directional solidification, percolation casting method, hydrogen template method,...

AI Technical Summary

Problems solved by technology

The preparation methods of micro-nano hierarchical porous metals include solid-gas eutectic directional solidification, percolation casting method, hydrogen template method, etc., but these methods have complicated operation, high cost or uneven pore structure, and the method of adding pore-forming agent Both the preparation of microporous metals and the preparation of nanoporous metals by dealloying have been studied to some extent, but there are few reports on the combination of the two methods to prepare metals with hierarchical porous structures.

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