Kinetics and Mechanism of the Degradation of Organic Compounds in Aqueous Solution Using α-MnO2/UiO-66-NO2/TFC-PA Catalytic Membrane
Main Article Content
Abstract
In this research, the α-MnO2/UiO-66-NO2/TFC-PA photocatalytic membrane was successfully fabricatedy immobilizing α-MnO2/UiO-66-NO2 catalyst onto the outer most surface of a thin film composite polyamide (TFC-PA) membrane via the interfacical polymerization process. The resulting membrane was characterized using techniques such as UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS) and nitrogen adsorption-desorption (BET). The photocatalytic activity was evaluated by the decomposition of methylene blue (MB) under the visible light irradiation, with a maximum removal efficiency reaching 95%. Kinetics studies revealed that the degradation process followed a pseudo-first-order model. Mechanism investigation exhibited that the superoxide radical •O2- played a dominant role in the photocatalytic process.
Keywords:
Photocatalyst membrane, Metal organic framework (MOF), Kinetics, Mechanism.
References
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https://doi.org/10.1016/j.heliyon.2024.e29648.
[6] D. Gangwar, C. Rath, Structural, Optical and Magnetic Properties of α- and β-MnO2 Nanorods, Applied Surface Science, Vol. 557, 2021, pp. 149693, https://doi.org/10.1016/j.apsusc.2021.149693.
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[9] S. Hammani, S. Guerziz, A. Ouradi, A. Alsalme, P. Samyn, A. Barhoum, Enhancement of Electrical Conductivity and Morphological Features of Polysulfone/MnO2 Nanocomposite Films with Differing α-MnO2 Nanorods Loadings, Materials Chemistry and Physics, Vol. 316, 2024, pp. 129144, https://doi.org/10.1016/j.matchemphys.2024.129144.
[10] C. Zhang, P. Dong, C. Wang, Y. Liu, K. Li, G. Feng, Cr3+-Doped α-MnO2 Electrode with High Specific Capacitance and Ultra-Long Cycle Life, Electrochimica Acta, Vol. 481, 2024, pp. 143946,
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[12] L. Liu, T. Hu, K. Dai, J. Zhang, C. Liang, A Novel Step-Scheme BiVO4/Ag3VO4 Photocatalyst for Enhanced Photocatalytic Degradation Activity under Visible Light Irradiation, Chinese Journal of Catalysis, Vol. 42, No. 1, 2021, pp. 46-55, https://doi.org/10.1016/S1872-2067(20)63560-4.
[13] H. T. Dinh, N. T. Tran, D. X. Trinh, Investigation into the Adsorption of Methylene Blue and Methyl Orange by UiO-66-NO2 Nanoparticles, Journal Analytical Methods in Chemistry, Vol. 2021, 2021, pp. 5512174,
https://doi.org/10.1155/2021/5512174.
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https://doi.org/10.1016/j.mtchem.2020.100302.
[15] T. L. Thien, D. T. Hien, P. T. Ngoc, L. T. Son, T. X. Dai, Synthesis of CuO/UiO-66-NO2 Photocatalyst Materials for the Treatment Of Organic Wastewater, Journal of Chemical, Physical and Biological Analysis, Vol. 29, No. 03, 2023, pp. 71-77 (in Vietnamese).
[16] T. L. Thien, L. T. Son, T. X. Dai, Synthesis of Fe2O3/UiO-66-NO2/TFC-PA Photocatalyst Membrane for Organic Pollutant Removal in Water, Vietnam Journal of Catalysis and Adsorption, Vol. 12, No. 03, 2023, pp. 75-82
(in Vietnamese).
[17] S. K. Sahu, A. Palai, D. Sahu, Photocatalytic Applications of Metal Oxide-Based Nanocomposites for Sustainable Environmental Remediation, Sustainable Chemistry for the Environment, Vol. 8, 2024, pp. 100162,
https://doi.org/10.1016/j.scenv.2024.100162.
[18] M. C. Roopa, Sharadadevi Kallimani, Harish Kumar K and Thirumala S, Influence of Withania Somnifera on CuO/rGO Composite via Solution Combustion Method for the Photodegradation of Rose Bengal Dye, Hybrid Advances, Vol. 8, 2025, pp. 100376, https://doi.org/10.1016/j.hybadv.2024.100376.