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Charge-Induced Interfacial Assembly Synergizing Photocatalytic Air Purification With Structural Color Decoration
Yuqi Wang1, Xuemei Chen2, Yuanfang Zhao2
1Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen, China.
Small (Weinheim an Der Bergstrasse, Germany)
|July 17, 2026
Summary
This study presents a novel, beetle-inspired coating that offers vibrant structural colors and purifies indoor air by degrading formaldehyde and killing bacteria. This bio-inspired material enhances decorative applications with air-purification functionality.
Area of Science:
- Materials Science
- Nanotechnology
- Environmental Science
Background:
- Traditional decorative materials can release toxic gases, posing health risks.
- There is a need for decorative materials with added air-purification functionalities.
Purpose of the Study:
- To develop a novel, structurally colored photocatalytic coating inspired by beetle wings.
- To combine aesthetic appeal with air-purification capabilities for decorative applications.
Main Methods:
- Fabrication of a coating using charge-induced interfacial crystallization and calcination of metal-organic frameworks (MOF) in an opal photonic crystal template.
- Incorporation of carbon-doping and oxygen vacancies into porous ZnO to enhance photocatalytic activity.
- Utilizing an inverse opal structure for non-iridescent structural colors and light-trapping.
Main Results:
- The coating exhibited non-iridescent structural colors and high light-trapping efficiency due to the inverse opal structure.
- Carbon-doped porous ZnO with oxygen vacancies demonstrated excellent photocatalytic ability, confirmed by simulations.
- The coating achieved 99.9% degradation of formaldehyde (HCHO) and 99.65% bacteria elimination with high recyclability.
Conclusions:
- The synergistic effect of carbon-doping/oxygen vacancies and the inverse opal structure results in enhanced photocatalysis.
- The bio-inspired structural colored photocatalytic coating shows significant potential as a decorative wall material for improving indoor air quality.
