Preparation of hierarchical porous materials and hierarchical porous materials

A technology of hierarchical porosity and secondary pores, which is applied in metal material coating process, anodic oxidation, coating, etc., can solve the problems of high cost, difficult to control, single silver pore structure, etc., and achieve low production cost, easy implementation, Effect of controllable pore size and porosity distribution

Inactive Publication Date: 2017-06-23
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Template method, the process is relatively complicated, the cost is high, and it is difficult to realize industrial production. At the same time, the pore structure of silver prepared by the above method is single and difficult to control.

Method used

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  • Preparation of hierarchical porous materials and hierarchical porous materials
  • Preparation of hierarchical porous materials and hierarchical porous materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: prepare the solution containing the NaOH of 0.1M and use it as electrolyte, zinc sheet is as working electrode, platinum sheet is counter electrode, mercury / mercuric oxide electrode is reference electrode, first in 3V (relative to reversible hydrogen electrode ) under electrochemical oxidation for 30 min, followed by electrochemical reduction at -3 V (relative to the reversible hydrogen electrode) for 10 min to obtain porous zinc.

Embodiment 2

[0025] Embodiment 2: prepare the solution containing the KOH of 0.2M and use it as electrolytic solution, copper wire is as working electrode, and platinum plate is counter electrode, and silver / silver chloride electrode is reference electrode, first at 0V (relative to reversible hydrogen electrode) for 1s, followed by electrochemical reduction at -2V (relative to the reversible hydrogen electrode) for 1s to obtain porous copper.

Embodiment 3

[0026] Embodiment 3: preparation contains the solution of the NaOH of 0.3M and it is used as electrolytic solution, nickel foil is as working electrode, and platinum sheet is counter electrode, and saturated calomel electrode is reference electrode, first at 2.0V (relative to reversible hydrogen electrode ) under electrochemical oxidation treatment for 12h, and then electrochemical reduction at -1.2V (relative to the reversible hydrogen electrode) to obtain porous nickel for 3h.

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Abstract

The invention relates to a preparation method of nanoporous metals, and especially relates to a preparation method of the nanoporous metals by a two-step method which comprises the following steps: oxidation of gold, copper, silver, zinc, iron, nickel and other metals into oxides as well as electrochemical reduction. Compared with prior art, the preparation method of the porous material has the advantages of green and environmental protection, simple, easy implement, and low production cost; apertures and porosity distribution of porous metals are controllable in the preparation process; and most metals can be prepared into oxides, and then a simple and fast oxygen ion removing mode is used for preparing the porous metals, so that the method has the advantage of widely use at the same time.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a preparation method of a porous material. Background technique [0002] Nanoporous metals are a new class of nanostructured materials developed this year. Because of their large specific surface area, low density, flexible and adjustable structure, and good permeability, porous materials are widely used in separation, catalysis, and transmission. Induction, medicine, electrodes, machinery and other fields. [0003] A common method for preparing porous metals is the dealloying method and the templating method. The dealloying method generally uses special alloys as raw materials. The alloys are usually prepared by metallurgical methods and are composed of two metals with a large difference in electrochemical potential. The relatively active metal elements in the raw material are controlled and dissolved by electrolysis or chemical corrosion, thereby gene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/02C23C8/12C23C8/80
CPCC25D11/02C23C8/12C23C8/80
Inventor 孙公权袁丽只姜鲁华
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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