Browsing by Author "Samitsu, S."

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    Synthesis and characterization of titanium dioxide hollow nanofiber for photocatalytic degradation of methylene blue dye
    (MDPI AG, 2021) Jafri, N.N.M.; Jaafar, J.; Alias, N.H.; Samitsu, S.; Aziz, F.; Salleh, W.N.W.; Mohd Yusop, M.Z.M.; Othman, M.H.D.; Rahman, M.A.; A.F., A.F.; Matsuura, T.; Isloor, A.M.
    Environmental crisis and water contamination have led to worldwide exploration for advanced technologies for wastewater treatment, and one of them is photocatalytic degradation. A one?dimensional hollow nanofiber with enhanced photocatalytic properties is considered a promising material to be applied in the field. Therefore, we synthesized titanium dioxide hollow nanofibers (THNF) with extended surface area, light?harvesting properties and an anatase–rutile heterojunction via a template synthesis method and followed by a calcination process. The effect of calcination temperature on the formation and properties of THNF were determined and the possible mechanism of THNF formation was proposed. THNF nanofibers produced at 600 °C consisted of a mixture of 24.2% anatase and 75.8% rutile, with a specific surface area of 81.2776 m2/g. The hollow nanofibers also outperformed the other catalysts in terms of photocatalytic degradation of MB dye, at 85.5%. The optimum catalyst loading, dye concentration, pH, and H2O2 concentration were determined at 0.75 g/L, 10 ppm, pH 11, and 10 mM, respectively. The highest degradation of methylene blue dye achieved was 95.2% after 4 h of UV irradiation. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.