A kind of ultrafine nanoporous metal and preparation method thereof

Abstract

The invention relates to ultra-fine nano-porous metal and a preparing method thereof. Specifically, amorphous alloy serves as a precursor, elements except Ag, Pt, Pd, Au, Cu, Ni, Ru, Rh, Os, Ir and other precious metal in the alloy are removed through a dealloying method, a nano-porous structure is formed, simple substance metal or alloy serves as band, the characteristic size of the frenula is smaller than 10 nanometers, and the time roughening feature is not obvious. The prepared ultra-fine nano-porous metal is provided with the ultra-fine holes and the frenula, and the integrity and the self-restraint performance of the structure can be still maintained after 70% of the volume is lost. The preparing method is simple, and adaptability is wide.

Description

Technical field

[0001] The invention relates to an ultrafine nano porous metal and a preparation method thereof. Background technique

[0002] The preparation of nanoporous metals by the dealloying method utilizes the chemical properties of different components in the alloy to selectively remove one or more of the more active components in the alloy. The inert components form a three-dimensional porous structure to form nanoporous metals. The dealloying method is a method that can easily and quickly obtain a three-dimensional network porous structure with a high specific surface area on the nano-scale. The product bands and pores are continuous with each other, and the porous structure can be dynamically adjusted. The cost is low and it is suitable for large-scale production. .

[0003] The precursor alloy is very important for the preparation of nanoporous metals by dealloying. Searching for new types of nanoporous metals and their precursor alloys has always been one of the hot...

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