Fabrication of Ca-doped TiO2 for enhanced methylene blue degradation under UV-Vis irradiation
Research continues to improve the dye degradation performance of TiO2 nanoparticles (NPs) through doping, tailoring, or modifying the lattice structure. A series of Ca–TiO2 (Ca ions 0.5–2.0 wt%) photocatalysts prepared by wet impregnation method were studied for methylene blue (MB) degradation under...
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Elsevier
2025-04-01
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| Series: | Next Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2949822824002892 |
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| author | Atol Mondal Sumon Islam SK. Methela Zaman Marzia Sultana Md. Minhaz Abedin Ashok Kumar Chakraborty Md Mahfuzur Rahman Md. Hafezur Rahaman Mst Sumaia Aktar Sumi Alam S.M. Nur |
| author_facet | Atol Mondal Sumon Islam SK. Methela Zaman Marzia Sultana Md. Minhaz Abedin Ashok Kumar Chakraborty Md Mahfuzur Rahman Md. Hafezur Rahaman Mst Sumaia Aktar Sumi Alam S.M. Nur |
| author_sort | Atol Mondal |
| collection | DOAJ |
| description | Research continues to improve the dye degradation performance of TiO2 nanoparticles (NPs) through doping, tailoring, or modifying the lattice structure. A series of Ca–TiO2 (Ca ions 0.5–2.0 wt%) photocatalysts prepared by wet impregnation method were studied for methylene blue (MB) degradation under UV-Vis irradiation, using different factors, including contact time, pH, initial dye concentration, and dosages. The photocatalyst samples were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX). Characterization results revealed the successful doping of Ca ion on the TiO2 surface, and Ti, O, and Ca were identified by EDX analysis as being present in the Ca-doped TiO2 sample. Calcium improved titania's charge separation capability, favoring the formation of more hydroxyl radicals during irradiation. Another important effect of Ca is the lowered bandgap energy of TiO2, which enhances the light absorption capacity into the visible regions. The photocatalytic performance varied with calcium ions content in the prepared catalysts, and a moderate amount showed the best activity. 1 wt% Ca–TiO2 exhibited a maximum MB degradation of 79.65 % with TOC removal of 52.36 % and followed the pseudo-first-order reactions kinetics with a rate constant of 0.0087 min−1. Notably, both the degradation performance and rate constant of 1 wt% Ca-TiO2 catalysts were much superior to pure TiO2 under the same reaction conditions. This finding suggests that Ca-TiO2 NPs could be a highly effective photocatalyst for the ecologically benign degradation of color compounds in textile wastewater. |
| format | Article |
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| institution | OA Journals |
| issn | 2949-8228 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Elsevier |
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| series | Next Materials |
| spelling | doaj-art-2db8a579cef54d9ab1ae62dca117aa4a2025-08-20T02:29:35ZengElsevierNext Materials2949-82282025-04-01710039210.1016/j.nxmate.2024.100392Fabrication of Ca-doped TiO2 for enhanced methylene blue degradation under UV-Vis irradiationAtol Mondal0Sumon Islam1SK. Methela Zaman2Marzia Sultana3Md. Minhaz Abedin4Ashok Kumar Chakraborty5Md Mahfuzur Rahman6Md. Hafezur Rahaman7Mst Sumaia Aktar Sumi8Alam S.M. Nur9Dept. of Chemical Engineering, Jashore University of Science and Technology, Jashore 7408, Bangladesh; AMREEN Lab, Jashore University of Science and Technology, Jashore 7408, BangladeshDept. of Chemical Engineering, Jashore University of Science and Technology, Jashore 7408, BangladeshDept. of Chemical Engineering, Jashore University of Science and Technology, Jashore 7408, BangladeshDept. of Chemical Engineering, Jashore University of Science and Technology, Jashore 7408, Bangladesh; AMREEN Lab, Jashore University of Science and Technology, Jashore 7408, BangladeshDept. of Chemical Engineering, Jashore University of Science and Technology, Jashore 7408, Bangladesh; AMREEN Lab, Jashore University of Science and Technology, Jashore 7408, BangladeshDept. of Applied Chemistry and Chemical Engineering, Islamic University, Kushtia 7003, BangladeshDept. of Industrial and Production Engineering, Jashore University of Science and Technology, Jashore 7408, BangladeshDept. of Applied Chemistry and Chemical Engineering, Islamic University, Kushtia 7003, BangladeshDept. of Chemical Engineering, Jashore University of Science and Technology, Jashore 7408, BangladeshDept. of Chemical Engineering, Jashore University of Science and Technology, Jashore 7408, Bangladesh; AMREEN Lab, Jashore University of Science and Technology, Jashore 7408, Bangladesh; Corresponding author at: Dept. of Chemical Engineering, Jashore University of Science and Technology, Jashore 7408, Bangladesh.Research continues to improve the dye degradation performance of TiO2 nanoparticles (NPs) through doping, tailoring, or modifying the lattice structure. A series of Ca–TiO2 (Ca ions 0.5–2.0 wt%) photocatalysts prepared by wet impregnation method were studied for methylene blue (MB) degradation under UV-Vis irradiation, using different factors, including contact time, pH, initial dye concentration, and dosages. The photocatalyst samples were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX). Characterization results revealed the successful doping of Ca ion on the TiO2 surface, and Ti, O, and Ca were identified by EDX analysis as being present in the Ca-doped TiO2 sample. Calcium improved titania's charge separation capability, favoring the formation of more hydroxyl radicals during irradiation. Another important effect of Ca is the lowered bandgap energy of TiO2, which enhances the light absorption capacity into the visible regions. The photocatalytic performance varied with calcium ions content in the prepared catalysts, and a moderate amount showed the best activity. 1 wt% Ca–TiO2 exhibited a maximum MB degradation of 79.65 % with TOC removal of 52.36 % and followed the pseudo-first-order reactions kinetics with a rate constant of 0.0087 min−1. Notably, both the degradation performance and rate constant of 1 wt% Ca-TiO2 catalysts were much superior to pure TiO2 under the same reaction conditions. This finding suggests that Ca-TiO2 NPs could be a highly effective photocatalyst for the ecologically benign degradation of color compounds in textile wastewater.http://www.sciencedirect.com/science/article/pii/S2949822824002892PhotocatalystDye degradationMethylene blueCa ions dopantWastewaterUV-Vis irradiation |
| spellingShingle | Atol Mondal Sumon Islam SK. Methela Zaman Marzia Sultana Md. Minhaz Abedin Ashok Kumar Chakraborty Md Mahfuzur Rahman Md. Hafezur Rahaman Mst Sumaia Aktar Sumi Alam S.M. Nur Fabrication of Ca-doped TiO2 for enhanced methylene blue degradation under UV-Vis irradiation Next Materials Photocatalyst Dye degradation Methylene blue Ca ions dopant Wastewater UV-Vis irradiation |
| title | Fabrication of Ca-doped TiO2 for enhanced methylene blue degradation under UV-Vis irradiation |
| title_full | Fabrication of Ca-doped TiO2 for enhanced methylene blue degradation under UV-Vis irradiation |
| title_fullStr | Fabrication of Ca-doped TiO2 for enhanced methylene blue degradation under UV-Vis irradiation |
| title_full_unstemmed | Fabrication of Ca-doped TiO2 for enhanced methylene blue degradation under UV-Vis irradiation |
| title_short | Fabrication of Ca-doped TiO2 for enhanced methylene blue degradation under UV-Vis irradiation |
| title_sort | fabrication of ca doped tio2 for enhanced methylene blue degradation under uv vis irradiation |
| topic | Photocatalyst Dye degradation Methylene blue Ca ions dopant Wastewater UV-Vis irradiation |
| url | http://www.sciencedirect.com/science/article/pii/S2949822824002892 |
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