Investigation of the effect of impurity and surface defect in the sonocatalytic and photocatalytic degradation of methylene blue dye by TiO2 powder
This study compares the performance of commercial titania (TiO2) powder in methylene blue (MB) dye removal in various solutions prepared using tap water (without and with a catalyst) under the same experimental conditions. Afterwards, the effect of impurities and surface defects is analyzed. From th...
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Elsevier
2025-09-01
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| Series: | Results in Chemistry |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S221171562500596X |
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| author | Ayodeji Precious Ayanwale Margarita Sánchez-Domínguez Rodrigo Mayén Mondragón Daniel Aguirre Aguirre M. Navarrete |
| author_facet | Ayodeji Precious Ayanwale Margarita Sánchez-Domínguez Rodrigo Mayén Mondragón Daniel Aguirre Aguirre M. Navarrete |
| author_sort | Ayodeji Precious Ayanwale |
| collection | DOAJ |
| description | This study compares the performance of commercial titania (TiO2) powder in methylene blue (MB) dye removal in various solutions prepared using tap water (without and with a catalyst) under the same experimental conditions. Afterwards, the effect of impurities and surface defects is analyzed. From the result, low degradation percentage is obtained after sonolysis and photolysis while 50.1 and 97.8 % degradation is obtained after sonocatalysis and photocatalysis, respectively. Additional studies are done to provide information about the changes in the size, functional group, crystal structure, morphology, elemental composition, electronic structure and surface chemistry of TiO2 by using various analytical methods. The mean particle size obtained from DLS is 267 ± 8 μm before degradation, 342 ± 9 μm after sonocatalysis and 379 ± 11 μm after photocatalysis. From the FTIR analysis, MB is degraded into CO2 and H2O while XRD shows that anatase phase remains unchanged. SEM studies show no change after degradation. EDX and PL show the presence of impurities. XPS confirms defects and reveals the presence of carbonyl groups that are attributed to the oxidized by-products of MB. 75.4 % degradation after just 10 min of treatment shows that photocatalysis is the most effective way for removing MB dye. The formation of ozone (O3/UV-C), use of tap water and cheaper commercial titania powder have made the result from this study noteworthy, as it presents the same degradation percentage as those reported in literature that uses TiO2 nanoparticles. |
| format | Article |
| id | doaj-art-77e3751dd42f4a8cbd65f5584c7c2b8b |
| institution | Kabale University |
| issn | 2211-7156 |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
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| series | Results in Chemistry |
| spelling | doaj-art-77e3751dd42f4a8cbd65f5584c7c2b8b2025-08-22T04:56:14ZengElsevierResults in Chemistry2211-71562025-09-011710261310.1016/j.rechem.2025.102613Investigation of the effect of impurity and surface defect in the sonocatalytic and photocatalytic degradation of methylene blue dye by TiO2 powderAyodeji Precious Ayanwale0Margarita Sánchez-Domínguez1Rodrigo Mayén Mondragón2Daniel Aguirre Aguirre3M. Navarrete4UNITA, Universidad Nacional Autónoma de México, Vía de la Innovación 410, PIIT-Monterrey Autopista Monterrey km 10, Apodaca 66628, Nuevo León, Mexico.; Corresponding author.GCIChApplied to Nanomaterials and Formulations, CIMAV-Unidad Monterrey, Alianza Norte 202, PIIT – Monterrey, Autopista Monterrey km 10, Apodaca 66628, Nuevo León, Mexico.UNITA, Universidad Nacional Autónoma de México, Vía de la Innovación 410, PIIT-Monterrey Autopista Monterrey km 10, Apodaca 66628, Nuevo León, Mexico.UNITA, Universidad Nacional Autónoma de México, Vía de la Innovación 410, PIIT-Monterrey Autopista Monterrey km 10, Apodaca 66628, Nuevo León, Mexico.UNITA, Universidad Nacional Autónoma de México, Vía de la Innovación 410, PIIT-Monterrey Autopista Monterrey km 10, Apodaca 66628, Nuevo León, Mexico.This study compares the performance of commercial titania (TiO2) powder in methylene blue (MB) dye removal in various solutions prepared using tap water (without and with a catalyst) under the same experimental conditions. Afterwards, the effect of impurities and surface defects is analyzed. From the result, low degradation percentage is obtained after sonolysis and photolysis while 50.1 and 97.8 % degradation is obtained after sonocatalysis and photocatalysis, respectively. Additional studies are done to provide information about the changes in the size, functional group, crystal structure, morphology, elemental composition, electronic structure and surface chemistry of TiO2 by using various analytical methods. The mean particle size obtained from DLS is 267 ± 8 μm before degradation, 342 ± 9 μm after sonocatalysis and 379 ± 11 μm after photocatalysis. From the FTIR analysis, MB is degraded into CO2 and H2O while XRD shows that anatase phase remains unchanged. SEM studies show no change after degradation. EDX and PL show the presence of impurities. XPS confirms defects and reveals the presence of carbonyl groups that are attributed to the oxidized by-products of MB. 75.4 % degradation after just 10 min of treatment shows that photocatalysis is the most effective way for removing MB dye. The formation of ozone (O3/UV-C), use of tap water and cheaper commercial titania powder have made the result from this study noteworthy, as it presents the same degradation percentage as those reported in literature that uses TiO2 nanoparticles.http://www.sciencedirect.com/science/article/pii/S221171562500596XXPSSonolysisPhotolysisDegradationBand gapSurface analysis |
| spellingShingle | Ayodeji Precious Ayanwale Margarita Sánchez-Domínguez Rodrigo Mayén Mondragón Daniel Aguirre Aguirre M. Navarrete Investigation of the effect of impurity and surface defect in the sonocatalytic and photocatalytic degradation of methylene blue dye by TiO2 powder Results in Chemistry XPS Sonolysis Photolysis Degradation Band gap Surface analysis |
| title | Investigation of the effect of impurity and surface defect in the sonocatalytic and photocatalytic degradation of methylene blue dye by TiO2 powder |
| title_full | Investigation of the effect of impurity and surface defect in the sonocatalytic and photocatalytic degradation of methylene blue dye by TiO2 powder |
| title_fullStr | Investigation of the effect of impurity and surface defect in the sonocatalytic and photocatalytic degradation of methylene blue dye by TiO2 powder |
| title_full_unstemmed | Investigation of the effect of impurity and surface defect in the sonocatalytic and photocatalytic degradation of methylene blue dye by TiO2 powder |
| title_short | Investigation of the effect of impurity and surface defect in the sonocatalytic and photocatalytic degradation of methylene blue dye by TiO2 powder |
| title_sort | investigation of the effect of impurity and surface defect in the sonocatalytic and photocatalytic degradation of methylene blue dye by tio2 powder |
| topic | XPS Sonolysis Photolysis Degradation Band gap Surface analysis |
| url | http://www.sciencedirect.com/science/article/pii/S221171562500596X |
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