Journal
PROGRESS IN ORGANIC COATINGS
Volume 148, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.porgcoat.2020.105882
Keywords
Composite photocatalyst; Photocatalytic coating; NO removal; Photooxidation; UV stability
Funding
- Natural Science Foundation of China [51202016]
- Special Fund for Basic Scientific Research of Central Colleges, Chang'an University [3001102319501]
- Natural Science Basic Research Plan in Shaanxi Province of China [2017JQ2025]
- Xi'an Science and Technology Planning Project [2017137SF/WM031]
- Fundamental Research Funds for the Central Universities, CHD [300102310301]
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Based on the porous structure of activated carbon (AC) and the photo-oxidation behavior of TiO2, a visible-lightresponsive photocatalytic coating with UV stability was constructed by loading Fe/N/Co-TiO2@AC (DTC) on waterborne acrylic coating. The DTC with adsorption and degradation synergistic effect was prepared by a simple mechanochemistry method and characterized by UV-vis, SEM, XRD, and BET. The nitric oxide (NO) removal efficiency of DTC was 51.6 % under visible light in 2 h. Besides, under the same conditions, the NO removal efficiency of the DTC coating still reached 45.8 %. Further, to investigate the UV stability of DTC coating, different coatings were prepared with the same dosage of DTC, TiO2@AC (TC), and TiO2. The UV stability of the coatings was tested with a color difference, degree of chalking, adhesion strength, hardness, and impact resistance as evaluation indicators. The results showed that the DTC coating exhibited the best UV stability. The photooxidation of organic binder on the coating surface before and after aging was micro-characterized by SEM and FT-IR, and the UV stability improvement mechanism was revealed.
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