Photocatalyzed degradation of flumequine by doped TiO2 and simulated solar light
Titanium dioxide was obtained in its pure form (TiO2) and in the presence of urea (u-TiO2) and thiourea (t-TiO2) using the sol-gel technique. The obtained powders were characterized by BET surface area analysis, Infrared Spectroscopy, Diffuse Reflectance Spectroscopy and the Rietveld refinement of X...
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2008
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paper:paper_03043894_v155_n1-2_p45_Nieto2023-06-08T15:29:25Z Photocatalyzed degradation of flumequine by doped TiO2 and simulated solar light Candal, Roberto Jorge Sileo, Elsa Ester Antibiotic Doped titanium dioxide Flumequine Photocatalysis Sol-gel Antibiotics Photocatalysis Rietveld refinement Sol-gel process Doped titanium dioxide Flumequine Toxic materials flumequine thiourea titanium dioxide Antibiotics Photocatalysis Rietveld refinement Sol-gel process Toxic materials antibiotics catalysis experimental design infrared spectroscopy multivariate analysis optimization oxide pH photodegradation solar radiation titanium urea X-ray diffraction article crystallography degradation diffuse reflectance spectroscopy infrared spectroscopy pH photocatalysis solar energy solar radiation X ray diffraction Anti-Bacterial Agents Catalysis Fluoroquinolones Photochemistry Sunlight Titanium Water Pollutants, Chemical Water Purification Titanium dioxide was obtained in its pure form (TiO2) and in the presence of urea (u-TiO2) and thiourea (t-TiO2) using the sol-gel technique. The obtained powders were characterized by BET surface area analysis, Infrared Spectroscopy, Diffuse Reflectance Spectroscopy and the Rietveld refinement of XRD measurements. All the prepared catalysts show high anatase content (>99%). The a and b-cell parameters of anatase increase in the order TiO2 < u-TiO2 < t-TiO2, while the c-parameter presents the opposite trend. Because of the interplay in cell dimensions, the cell grows thicker and shorter when prepared in the presence of urea and thiourea, respectively. The cell volume decreases in the order t-TiO2 > u-TiO2 > TiO2. The photocatalytic activities of the samples were determined on flumequine under solar-simulated irradiation. The most active catalysts were u-TiO2 and t-TiO2, reaching values over 90% of flumequine degradation after 15 min irradiation, compared with values of 55% for the pure TiO2 catalyst. Changing simultaneously the catalyst amount (t-TiO2) and pH, multivariate analysis using the response surface methodology was used to determine the roughly optimal conditions for flumequine degradation. The optimized conditions found were pH below 7 and a catalyst amount of 1.6 g L-1. © 2007 Elsevier B.V. All rights reserved. Fil:Candal, R.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Sileo, E.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2008 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03043894_v155_n1-2_p45_Nieto http://hdl.handle.net/20.500.12110/paper_03043894_v155_n1-2_p45_Nieto |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Antibiotic Doped titanium dioxide Flumequine Photocatalysis Sol-gel Antibiotics Photocatalysis Rietveld refinement Sol-gel process Doped titanium dioxide Flumequine Toxic materials flumequine thiourea titanium dioxide Antibiotics Photocatalysis Rietveld refinement Sol-gel process Toxic materials antibiotics catalysis experimental design infrared spectroscopy multivariate analysis optimization oxide pH photodegradation solar radiation titanium urea X-ray diffraction article crystallography degradation diffuse reflectance spectroscopy infrared spectroscopy pH photocatalysis solar energy solar radiation X ray diffraction Anti-Bacterial Agents Catalysis Fluoroquinolones Photochemistry Sunlight Titanium Water Pollutants, Chemical Water Purification |
| spellingShingle |
Antibiotic Doped titanium dioxide Flumequine Photocatalysis Sol-gel Antibiotics Photocatalysis Rietveld refinement Sol-gel process Doped titanium dioxide Flumequine Toxic materials flumequine thiourea titanium dioxide Antibiotics Photocatalysis Rietveld refinement Sol-gel process Toxic materials antibiotics catalysis experimental design infrared spectroscopy multivariate analysis optimization oxide pH photodegradation solar radiation titanium urea X-ray diffraction article crystallography degradation diffuse reflectance spectroscopy infrared spectroscopy pH photocatalysis solar energy solar radiation X ray diffraction Anti-Bacterial Agents Catalysis Fluoroquinolones Photochemistry Sunlight Titanium Water Pollutants, Chemical Water Purification Candal, Roberto Jorge Sileo, Elsa Ester Photocatalyzed degradation of flumequine by doped TiO2 and simulated solar light |
| topic_facet |
Antibiotic Doped titanium dioxide Flumequine Photocatalysis Sol-gel Antibiotics Photocatalysis Rietveld refinement Sol-gel process Doped titanium dioxide Flumequine Toxic materials flumequine thiourea titanium dioxide Antibiotics Photocatalysis Rietveld refinement Sol-gel process Toxic materials antibiotics catalysis experimental design infrared spectroscopy multivariate analysis optimization oxide pH photodegradation solar radiation titanium urea X-ray diffraction article crystallography degradation diffuse reflectance spectroscopy infrared spectroscopy pH photocatalysis solar energy solar radiation X ray diffraction Anti-Bacterial Agents Catalysis Fluoroquinolones Photochemistry Sunlight Titanium Water Pollutants, Chemical Water Purification |
| description |
Titanium dioxide was obtained in its pure form (TiO2) and in the presence of urea (u-TiO2) and thiourea (t-TiO2) using the sol-gel technique. The obtained powders were characterized by BET surface area analysis, Infrared Spectroscopy, Diffuse Reflectance Spectroscopy and the Rietveld refinement of XRD measurements. All the prepared catalysts show high anatase content (>99%). The a and b-cell parameters of anatase increase in the order TiO2 < u-TiO2 < t-TiO2, while the c-parameter presents the opposite trend. Because of the interplay in cell dimensions, the cell grows thicker and shorter when prepared in the presence of urea and thiourea, respectively. The cell volume decreases in the order t-TiO2 > u-TiO2 > TiO2. The photocatalytic activities of the samples were determined on flumequine under solar-simulated irradiation. The most active catalysts were u-TiO2 and t-TiO2, reaching values over 90% of flumequine degradation after 15 min irradiation, compared with values of 55% for the pure TiO2 catalyst. Changing simultaneously the catalyst amount (t-TiO2) and pH, multivariate analysis using the response surface methodology was used to determine the roughly optimal conditions for flumequine degradation. The optimized conditions found were pH below 7 and a catalyst amount of 1.6 g L-1. © 2007 Elsevier B.V. All rights reserved. |
| author |
Candal, Roberto Jorge Sileo, Elsa Ester |
| author_facet |
Candal, Roberto Jorge Sileo, Elsa Ester |
| author_sort |
Candal, Roberto Jorge |
| title |
Photocatalyzed degradation of flumequine by doped TiO2 and simulated solar light |
| title_short |
Photocatalyzed degradation of flumequine by doped TiO2 and simulated solar light |
| title_full |
Photocatalyzed degradation of flumequine by doped TiO2 and simulated solar light |
| title_fullStr |
Photocatalyzed degradation of flumequine by doped TiO2 and simulated solar light |
| title_full_unstemmed |
Photocatalyzed degradation of flumequine by doped TiO2 and simulated solar light |
| title_sort |
photocatalyzed degradation of flumequine by doped tio2 and simulated solar light |
| publishDate |
2008 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03043894_v155_n1-2_p45_Nieto http://hdl.handle.net/20.500.12110/paper_03043894_v155_n1-2_p45_Nieto |
| work_keys_str_mv |
AT candalrobertojorge photocatalyzeddegradationofflumequinebydopedtio2andsimulatedsolarlight AT sileoelsaester photocatalyzeddegradationofflumequinebydopedtio2andsimulatedsolarlight |
| _version_ |
1768545465543950336 |