Photocatalytic and antifouling properties of electrospun TiO2 polyacrylonitrile composite nanofibers under visible light
| Autor: | Arnoux Rossouw, Omoniyi Pereao, Chris Ademola Bode-Aluko, Olanrewaju Fatoba, Htet Htet Kyaw, Laila Al-Naamani, Leslie F. Petrik, Myo Tay Zar Myint, Mohammed Al-Abri, Sergey Dobretsov |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Scanning electron microscope Mechanical Engineering Polyacrylonitrile 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Contact angle chemistry.chemical_compound Chemical engineering X-ray photoelectron spectroscopy chemistry Mechanics of Materials Nanofiber Photocatalysis General Materials Science Fourier transform infrared spectroscopy 0210 nano-technology Visible spectrum |
| Zdroj: | Materials Science and Engineering: B. 264:114913 |
| ISSN: | 0921-5107 |
| DOI: | 10.1016/j.mseb.2020.114913 |
| Popis: | Polyacrylonitrile and its TiO2 composites were electrospun into nanofibers in N, N’-dimethylformamide for photocatalysis and antifouling experiments. The resultants nanofibers were characterized using field emission scanning microscope, Fourier transform infrared spectroscopy, x-ray diffraction, x-ray photoelectron spectroscopy and contact angle analyses. Fourier transform infrared spectroscopy confirmed the formation of polyacrylonitrile-TiO2 composite nanofibers with their diameter ranging from 10 to 340 nm. The x-ray photoelectron spectroscopy results indicate the formation of O–Ti–C bonds on polyacrylonitrile-TiO2 matrix. polyacrylonitrile-TiO2 and polyacrylonitrile nanofiber surfaces showed superhydrophobicity with water contact angle of 155 ± 1 and 154 ± 1, respectively at 120 s. The photocatalytic properties of polyacrylonitrile nanofibers and polyacrylonitrile-TiO2 nanofibers were investigated under a simulated visible light source of 1000 W/m2 using methylene blue. About 90% of methylene blue was degraded within 3 h of exposure using polyacrylonitrile-TiO2 nanofibers while 55% methylene blue degradation was achieved for polyacrylonitrile nanofibers. Photoluminescence experiment conducted on both materials showed that polyacrylonitrile-TiO2 could produce OH radicals 10-fold compared to polyacrylonitrile nanofibers. Antimicrobial tests were conducted using E. coli and Bacillus sp. The results showed that only polyacrylonitrile-TiO2 under visible light hindered the growth of these bacteria with a greater effect on the Gram-positive bacterium, Bacillus sp. The photo-degradation and microbial growth inhibition properties of polyacrylonitrile-TiO2 showed that the material could be used as an antifouling material under visible light. |
| Databáze: | OpenAIRE |
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