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Three-dimensional bicontinuous nanoporous materials by vapor phase dealloying
Zhen Lu1,2, Cheng Li1, Jiuhui Han1
1Advanced Institute for Materials Research, Tohoku University, Sendai, 980-8577, Japan.
Nature Communications
|January 20, 2018
Summary
A new green vapor-phase dealloying method fabricates 3D bicontinuous open nanoporous materials universally. This eco-friendly technique recovers elements and offers tunable pore sizes for catalysis and energy storage.
Area of Science:
- Materials Science
- Nanotechnology
- Chemical Engineering
Background:
- Three-dimensional bicontinuous open (3DBO) nanoporosity is crucial for catalysis, sensing, and energy storage.
- Conventional dealloying methods (electrochemical, liquid-metal) have limitations in alloy applicability and generate chemical waste.
Purpose of the Study:
- To develop a green and universal method for fabricating 3DBO nanoporous materials.
- To overcome the limitations of existing dealloying techniques.
Main Methods:
- Utilizing vapor pressure differences between alloy elements for selective component removal.
- Employing a vapor-phase dealloying approach.
Main Results:
- Fabrication of nanoporous materials from a wide range of elements, irrespective of chemical activity.
- Achieved tunable pore sizes in the resulting nanoporous structures.
- Demonstrated full recovery of evaporated components, highlighting the method's sustainability.
Conclusions:
- Vapor-phase dealloying is an environmentally friendly and versatile technique for producing 3DBO nanoporous materials.
- This method enables broad applications in catalysis, sensing, and energy storage.
- The ability to recover elements makes this approach highly sustainable.
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