Altering fiber density of cockscomb-like fibrous silica–titania catalysts for enhanced photodegradation of ibuprofen
Fibrous silica–titania (FST) catalysts were synthesized by microemulsion followed by silica seed-crystal crystallization methods under various molar ratios of toluene to water (T/W). The catalysts were characterized by XRD, UV-DRS, FESEM, TEM, AFM, N2 adsorption–desorption, FTIR, and ESR. The result...
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my.utm.854272020-06-30T08:39:17Z http://eprints.utm.my/id/eprint/85427/ Altering fiber density of cockscomb-like fibrous silica–titania catalysts for enhanced photodegradation of ibuprofen Fauzi, A. A. Jalil, A. A. Mohamed, M. Triwahyono, S. Jusoh, N. W. C. A. Rahman, A. F. A. Aziz, F. F. Hassan, N. S. Khusnun, N. F. Tanaka, H. TP Chemical technology Fibrous silica–titania (FST) catalysts were synthesized by microemulsion followed by silica seed-crystal crystallization methods under various molar ratios of toluene to water (T/W). The catalysts were characterized by XRD, UV-DRS, FESEM, TEM, AFM, N2 adsorption–desorption, FTIR, and ESR. The results revealed that altering the T/W ratio affected the growth of the silica and titania and led to different size, fiber density, silica–titania structure, and number of hydroxyl groups, as well as oxygen vacancies in the FSTs, which altered their behavior toward subsequent application. Photodegradation of ibuprofen (IBP) are in the following order: FST(6:1) (90%) > FST(5:1) (84%) > FST(7:1) (79%) > commercial TiO2 (67%). A kinetics study using Langmuir–Hinshelwood model illustrated that the photodegradation followed the pseudo-first-order and adsorption was the rate-limiting step. Optimization by response surface methodology (RSM) showed that the pH, initial concentration, and catalyst dosage were the remarkable parameters in photodegradation of IBP. The FST (6:1) maintained its photocatalytic activities for up to five cycles reaction without serious catalyst deactivation, and was also able to degrade other endocrine-disrupting chemicals, indicating its potential use for the treatment of those chemicals in wastewater. Elsevier Ltd. 2018-12-01 Article PeerReviewed Fauzi, A. A. and Jalil, A. A. and Mohamed, M. and Triwahyono, S. and Jusoh, N. W. C. and A. Rahman, A. F. and A. Aziz, F. F. and Hassan, N. S. and Khusnun, N. F. and Tanaka, H. (2018) Altering fiber density of cockscomb-like fibrous silica–titania catalysts for enhanced photodegradation of ibuprofen. Journal of Environmental Management, 227 . pp. 34-43. ISSN 0301-4797 http://dx.doi.org/10.1016/j.jenvman.2018.08.073 DOI:10.1016/j.jenvman.2018.08.073 |
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TP Chemical technology Fauzi, A. A. Jalil, A. A. Mohamed, M. Triwahyono, S. Jusoh, N. W. C. A. Rahman, A. F. A. Aziz, F. F. Hassan, N. S. Khusnun, N. F. Tanaka, H. Altering fiber density of cockscomb-like fibrous silica–titania catalysts for enhanced photodegradation of ibuprofen |
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Fibrous silica–titania (FST) catalysts were synthesized by microemulsion followed by silica seed-crystal crystallization methods under various molar ratios of toluene to water (T/W). The catalysts were characterized by XRD, UV-DRS, FESEM, TEM, AFM, N2 adsorption–desorption, FTIR, and ESR. The results revealed that altering the T/W ratio affected the growth of the silica and titania and led to different size, fiber density, silica–titania structure, and number of hydroxyl groups, as well as oxygen vacancies in the FSTs, which altered their behavior toward subsequent application. Photodegradation of ibuprofen (IBP) are in the following order: FST(6:1) (90%) > FST(5:1) (84%) > FST(7:1) (79%) > commercial TiO2 (67%). A kinetics study using Langmuir–Hinshelwood model illustrated that the photodegradation followed the pseudo-first-order and adsorption was the rate-limiting step. Optimization by response surface methodology (RSM) showed that the pH, initial concentration, and catalyst dosage were the remarkable parameters in photodegradation of IBP. The FST (6:1) maintained its photocatalytic activities for up to five cycles reaction without serious catalyst deactivation, and was also able to degrade other endocrine-disrupting chemicals, indicating its potential use for the treatment of those chemicals in wastewater. |
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Fauzi, A. A. Jalil, A. A. Mohamed, M. Triwahyono, S. Jusoh, N. W. C. A. Rahman, A. F. A. Aziz, F. F. Hassan, N. S. Khusnun, N. F. Tanaka, H. |
author_facet |
Fauzi, A. A. Jalil, A. A. Mohamed, M. Triwahyono, S. Jusoh, N. W. C. A. Rahman, A. F. A. Aziz, F. F. Hassan, N. S. Khusnun, N. F. Tanaka, H. |
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Fauzi, A. A. |
title |
Altering fiber density of cockscomb-like fibrous silica–titania catalysts for enhanced photodegradation of ibuprofen |
title_short |
Altering fiber density of cockscomb-like fibrous silica–titania catalysts for enhanced photodegradation of ibuprofen |
title_full |
Altering fiber density of cockscomb-like fibrous silica–titania catalysts for enhanced photodegradation of ibuprofen |
title_fullStr |
Altering fiber density of cockscomb-like fibrous silica–titania catalysts for enhanced photodegradation of ibuprofen |
title_full_unstemmed |
Altering fiber density of cockscomb-like fibrous silica–titania catalysts for enhanced photodegradation of ibuprofen |
title_sort |
altering fiber density of cockscomb-like fibrous silica–titania catalysts for enhanced photodegradation of ibuprofen |
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Elsevier Ltd. |
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2018 |
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http://eprints.utm.my/id/eprint/85427/ http://dx.doi.org/10.1016/j.jenvman.2018.08.073 |
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1672610532678434816 |
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13.15806 |