Version 1
: Received: 22 February 2024 / Approved: 22 February 2024 / Online: 23 February 2024 (09:54:38 CET)
How to cite:
Le, P. H.; Vy, T. T. T.; Thanh, V. V.; Hieu, D. H.; Tran, Q.-T.; Nguyen, N.-V. T.; Uyen, N. N.; Tram, N. T. T.; Toan, N. C.; Xuan, L. T.; Tuyen, L. T. C.; Kien, N. T.; Hu, Y.-M.; Jian, S.-R. Facile and economical preparation method of TiO2/activated carbon for photocatalytic degradation of methylene blue. Preprints2024, 2024021335. https://doi.org/10.20944/preprints202402.1335.v1
Le, P. H.; Vy, T. T. T.; Thanh, V. V.; Hieu, D. H.; Tran, Q.-T.; Nguyen, N.-V. T.; Uyen, N. N.; Tram, N. T. T.; Toan, N. C.; Xuan, L. T.; Tuyen, L. T. C.; Kien, N. T.; Hu, Y.-M.; Jian, S.-R. Facile and economical preparation method of TiO2/activated carbon for photocatalytic degradation of methylene blue. Preprints 2024, 2024021335. https://doi.org/10.20944/preprints202402.1335.v1
Le, P. H.; Vy, T. T. T.; Thanh, V. V.; Hieu, D. H.; Tran, Q.-T.; Nguyen, N.-V. T.; Uyen, N. N.; Tram, N. T. T.; Toan, N. C.; Xuan, L. T.; Tuyen, L. T. C.; Kien, N. T.; Hu, Y.-M.; Jian, S.-R. Facile and economical preparation method of TiO2/activated carbon for photocatalytic degradation of methylene blue. Preprints2024, 2024021335. https://doi.org/10.20944/preprints202402.1335.v1
APA Style
Le, P. H., Vy, T. T. T., Thanh, V. V., Hieu, D. H., Tran, Q. T., Nguyen, N. V. T., Uyen, N. N., Tram, N. T. T., Toan, N. C., Xuan, L. T., Tuyen, L. T. C., Kien, N. T., Hu, Y. M., & Jian, S. R. (2024). Facile and economical preparation method of TiO<sub>2</sub>/activated carbon for photocatalytic degradation of methylene blue. Preprints. https://doi.org/10.20944/preprints202402.1335.v1
Chicago/Turabian Style
Le, P. H., Yu-Min Hu and Sheng-Rui Jian. 2024 "Facile and economical preparation method of TiO<sub>2</sub>/activated carbon for photocatalytic degradation of methylene blue" Preprints. https://doi.org/10.20944/preprints202402.1335.v1
Abstract
Nanocomposites of TiO2 Degussa P25 nanoparticles/activated carbon (TiO2/AC) were prepared at various mass ratios of (4:1), (3:2), (2:3), and (1:4) by a facile process. The effects of TiO2/ACmass ratios on the structural, morphological, and photocatalytic properties were systematically studied in comparison with bare TiO2 and bare AC. TiO2 nanoparticles exhibited dominant anatase and minor rutile phases, and a crystallite size of approximately 21 nm; while AC had XRD peaks of graphite and carbon, and a crystallite size of 49 nm. The composites exhibited tight decoration of TiO2 nanoparticles on micron-/submicron AC particles, and uniform TiO2/AC composites were obtained as evidenced by the uniform distribution of Ti, O, and C in an EDS mapping. Moreover, Raman spectra show the typical vibration modes of anatase TiO2 (e.g., E1g(1), B1g(1), Eg(3)) and carbon materials with D and G bands. The TiO2/AC with (4:1), (3:2), and (2:3) possessed higher reaction rate constants (k) in photocatalytic degradation of methylene blue (MB) than that of either TiO2 or AC. Among the investigated materials, TiO2/AC = 4:1 achieved the highest photocatalytic activity with a high k of 55.2×10-3 min-1and an MB removal efficiency of 96.6% after 30 min treatment under UV-Vis irradiation (120 mW/cm2). The enhanced photocatalytic activity for TiO2/AC is due to the synergistic effect of the high adsorption capability of AC and the high photocatalytic activity of TiO2. Furthermore, TiO2/AC promotes the separation of photoexcited electron/hole (e-/h+) pairs to reduce their recombination rate and thus enhance photocatalytic activity. The optimal TiO2/AC composite in this study can be used for treating industrial or household wastewater with organic pollutants.
Keywords
TiO2/activated carbon, mass mixing ratio, photocatalyst, methylene blue.
Subject
Chemistry and Materials Science, Materials Science and Technology
Copyright:
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