Titanium dioxide - activated carbon composite for photoelectrochemical degradation of phenol
In this study, titanium dioxide (TiO2) and titanium dioxide – activated carbon composite (TiO2–AC) were prepared by sol-gel method for photoelectrochemical (PEC) applications. Characterization of the materials was performed by scanning electron microscope, energy dispersive X-ray analysis, Fourier t...
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| Format: | Article |
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Uralʹskij federalʹnyj universitet imeni pervogo Prezidenta Rossii B.N. Elʹcina
2022-10-01
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| Series: | Chimica Techno Acta |
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| Online Access: | https://chimicatechnoacta.ru/article/view/6159 |
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| author | L. H. Q. Anh Uyen P. N. Tran P. V. G. Nghi H. T. Le N. T. B. Khuyen T. D. Hai |
| author_facet | L. H. Q. Anh Uyen P. N. Tran P. V. G. Nghi H. T. Le N. T. B. Khuyen T. D. Hai |
| author_sort | L. H. Q. Anh |
| collection | DOAJ |
| description | In this study, titanium dioxide (TiO2) and titanium dioxide – activated carbon composite (TiO2–AC) were prepared by sol-gel method for photoelectrochemical (PEC) applications. Characterization of the materials was performed by scanning electron microscope, energy dispersive X-ray analysis, Fourier transform infrared spectroscopy, X-ray diffraction, and diffuse reflectance spectroscopy. The results show that TiO2 was successfully loaded on activated carbon (AC), producing TiO2–AC with 2.61 eV of bandgap energy, lower than that of TiO2 (3.15 eV). Photoanodes based on TiO2 and TiO2–AC were fabricated and applied to PEC experiments for phenol degradation. In comparison with the TiO2 photoanode, the TiO2–AC one exhibited superior photocatalytic activity, which was indicated by a high current density and effective phenol removal. A mechanism of phenol PEC degradation on the TiO2–AC photoanode was proposed, which includes interaction between protonated phenol and active sites bearing oxygen on the photoanode surface. A kinetic model according to this mechanism was also established and fitted to experimental findings, resulting in rate constants of elementary reactions. |
| format | Article |
| id | doaj-art-3db61e96bea44992aabb5b83eb5b2ef1 |
| institution | Kabale University |
| issn | 2411-1414 |
| language | English |
| publishDate | 2022-10-01 |
| publisher | Uralʹskij federalʹnyj universitet imeni pervogo Prezidenta Rossii B.N. Elʹcina |
| record_format | Article |
| series | Chimica Techno Acta |
| spelling | doaj-art-3db61e96bea44992aabb5b83eb5b2ef12024-12-25T09:36:55ZengUralʹskij federalʹnyj universitet imeni pervogo Prezidenta Rossii B.N. ElʹcinaChimica Techno Acta2411-14142022-10-019410.15826/chimtech.2022.9.4.164629Titanium dioxide - activated carbon composite for photoelectrochemical degradation of phenolL. H. Q. Anh0Uyen P. N. Tran1P. V. G. Nghi2H. T. Le3N. T. B. Khuyen4T. D. Hai5Ho Chi Minh city University of Natural Resources and EnvironmentVan Hien UniversityTon Duc Thang UniversityTon Duc Thang UniversityHo Chi Minh city University of Natural Resources and EnvironmentHo Chi Minh city University of Natural Resources and EnvironmentIn this study, titanium dioxide (TiO2) and titanium dioxide – activated carbon composite (TiO2–AC) were prepared by sol-gel method for photoelectrochemical (PEC) applications. Characterization of the materials was performed by scanning electron microscope, energy dispersive X-ray analysis, Fourier transform infrared spectroscopy, X-ray diffraction, and diffuse reflectance spectroscopy. The results show that TiO2 was successfully loaded on activated carbon (AC), producing TiO2–AC with 2.61 eV of bandgap energy, lower than that of TiO2 (3.15 eV). Photoanodes based on TiO2 and TiO2–AC were fabricated and applied to PEC experiments for phenol degradation. In comparison with the TiO2 photoanode, the TiO2–AC one exhibited superior photocatalytic activity, which was indicated by a high current density and effective phenol removal. A mechanism of phenol PEC degradation on the TiO2–AC photoanode was proposed, which includes interaction between protonated phenol and active sites bearing oxygen on the photoanode surface. A kinetic model according to this mechanism was also established and fitted to experimental findings, resulting in rate constants of elementary reactions.https://chimicatechnoacta.ru/article/view/6159photoelectrochemicaltitanium dioxidephenol degradationphotocatalystkinetic model |
| spellingShingle | L. H. Q. Anh Uyen P. N. Tran P. V. G. Nghi H. T. Le N. T. B. Khuyen T. D. Hai Titanium dioxide - activated carbon composite for photoelectrochemical degradation of phenol Chimica Techno Acta photoelectrochemical titanium dioxide phenol degradation photocatalyst kinetic model |
| title | Titanium dioxide - activated carbon composite for photoelectrochemical degradation of phenol |
| title_full | Titanium dioxide - activated carbon composite for photoelectrochemical degradation of phenol |
| title_fullStr | Titanium dioxide - activated carbon composite for photoelectrochemical degradation of phenol |
| title_full_unstemmed | Titanium dioxide - activated carbon composite for photoelectrochemical degradation of phenol |
| title_short | Titanium dioxide - activated carbon composite for photoelectrochemical degradation of phenol |
| title_sort | titanium dioxide activated carbon composite for photoelectrochemical degradation of phenol |
| topic | photoelectrochemical titanium dioxide phenol degradation photocatalyst kinetic model |
| url | https://chimicatechnoacta.ru/article/view/6159 |
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