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Superhydrophilic Fe3+ Doped TiO2 Films with Long-Lasting Antifogging Performance.
Yi Yang1,2, Tianyu Sun1,2, Fuliang Ma1
1Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, P. R. China.
This study developed a durable, iron-doped titanium dioxide (TiO2) film for antifogging applications. The enhanced TiO2 film maintains superhydrophilicity for 60 days, offering long-lasting fog-free performance.
Area of Science:
- Materials Science
- Surface Chemistry
- Nanotechnology
Background:
- Titanium dioxide (TiO2) exhibits superhydrophilicity under UV irradiation, making it suitable for antifogging applications.
- Achieving a durable superhydrophilic state and broader photoresponse is crucial for practical TiO2-based antifogging solutions.
- Doping TiO2 is an effective strategy to enhance its photoresponse and prolong its superhydrophilic properties.
Purpose of the Study:
- To prepare and investigate a Fe3+ doped TiO2 film for long-lasting superhydrophilicity and antifogging.
- To explore the microscopic mechanisms behind the enhanced antifogging performance of Fe3+ doped TiO2 using experimental and computational methods.
Main Methods:
- Sol-gel method for preparing Fe3+ doped TiO2 films.
- Antifogging performance tests to evaluate durability.
- Density-functional theory (DFT) calculations to elucidate the underlying mechanisms.
Main Results:
- 1.0 mol % Fe3+ doping resulted in a TiO2 film with durable antifogging properties, lasting up to 60 days.
- DFT calculations indicated that Fe3+ doping enhances TiO2's photolysis ability under sunlight.
- Fe3+ doping also improves the stability of hydroxyl adsorbates on the TiO2 surface, contributing to sustained superhydrophilicity.
Conclusions:
- Fe3+ doping is a viable method to achieve long-lasting superhydrophilicity and antifogging performance in TiO2 films.
- The enhanced durability is attributed to improved photolysis and hydroxyl adsorbate stability induced by Fe3+ doping.
- This Fe3+ doped TiO2 film shows significant potential for advanced antifogging applications.
