Electroblown titanium dioxide and titanium dioxide/silicon dioxide submicron fibers with and without titania nanorod layer for strontium(II) uptake
Nuclear power is a clean alternative to fossil fuels. However, the use of nuclear energy generates hazardous fission products of which 90Sr is the second most important. To remove Sr2+ from aqueous solutions, we synthesized submicron TiO2 and TiO2/SiO2 composite fibers with Ti : Si molar ratios of 3...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-03-01
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| Series: | Chemical Engineering Journal Advances |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666821122001946 |
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| author | Johanna Paajanen Lauri Pettilä Satu Lönnrot Mikko Heikkilä Timo Hatanpää Mikko Ritala Risto Koivula |
| author_facet | Johanna Paajanen Lauri Pettilä Satu Lönnrot Mikko Heikkilä Timo Hatanpää Mikko Ritala Risto Koivula |
| author_sort | Johanna Paajanen |
| collection | DOAJ |
| description | Nuclear power is a clean alternative to fossil fuels. However, the use of nuclear energy generates hazardous fission products of which 90Sr is the second most important. To remove Sr2+ from aqueous solutions, we synthesized submicron TiO2 and TiO2/SiO2 composite fibers with Ti : Si molar ratios of 3 : 1 (3TiO2–1SiO2) and 1 : 1 (1TiO2–1SiO2) utilizing a novel electroblowing technique. After calcination at 500 °C, the TiO2 and 3TiO2–1SiO2 fibers had a predominantly anatase TiO2 structure with portions of rutile and brookite but the crystallites in the 3TiO2–1SiO2 fibers were smaller due to the SiO2 component. The 1TiO2–1SiO2 fibers were quasi-amorphous. Rutile TiO2 nanorods were grown on the fibers by a hydrothermal method. The rods seemed to grow only on the TiO2 domains of the fiber surface, which affected their size and morphology. In batch adsorption experiments all the fibers had excellent Sr2+ uptake with the hydrothermally modified TiO2 fibers having the highest distribution coefficient (Kd) of 3,490,000 mL g−1. The results show that both anatase and rutile TiO2 can efficiently adsorb Sr2+ from an aqueous environment. Hardly any damage was observed in the nanorods on the TiO2 fibers in a column operation test with flow rates up to 74 mL h−1 which is promising for the use of the fibers in industrial column mode wastewater treatment. |
| first_indexed | 2024-04-10T23:46:32Z |
| format | Article |
| id | doaj.art-ff18bff97b4a405090d7d895f71c58c8 |
| institution | Directory Open Access Journal |
| issn | 2666-8211 |
| language | English |
| last_indexed | 2024-04-10T23:46:32Z |
| publishDate | 2023-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Chemical Engineering Journal Advances |
| spelling | doaj.art-ff18bff97b4a405090d7d895f71c58c82023-01-11T04:30:23ZengElsevierChemical Engineering Journal Advances2666-82112023-03-0113100434Electroblown titanium dioxide and titanium dioxide/silicon dioxide submicron fibers with and without titania nanorod layer for strontium(II) uptakeJohanna Paajanen0Lauri Pettilä1Satu Lönnrot2Mikko Heikkilä3Timo Hatanpää4Mikko Ritala5Risto Koivula6Corresponding author.; Department of Chemistry, P.O. Box 55, FI-00014 University of Helsinki, FinlandDepartment of Chemistry, P.O. Box 55, FI-00014 University of Helsinki, FinlandDepartment of Chemistry, P.O. Box 55, FI-00014 University of Helsinki, FinlandDepartment of Chemistry, P.O. Box 55, FI-00014 University of Helsinki, FinlandDepartment of Chemistry, P.O. Box 55, FI-00014 University of Helsinki, FinlandDepartment of Chemistry, P.O. Box 55, FI-00014 University of Helsinki, FinlandDepartment of Chemistry, P.O. Box 55, FI-00014 University of Helsinki, FinlandNuclear power is a clean alternative to fossil fuels. However, the use of nuclear energy generates hazardous fission products of which 90Sr is the second most important. To remove Sr2+ from aqueous solutions, we synthesized submicron TiO2 and TiO2/SiO2 composite fibers with Ti : Si molar ratios of 3 : 1 (3TiO2–1SiO2) and 1 : 1 (1TiO2–1SiO2) utilizing a novel electroblowing technique. After calcination at 500 °C, the TiO2 and 3TiO2–1SiO2 fibers had a predominantly anatase TiO2 structure with portions of rutile and brookite but the crystallites in the 3TiO2–1SiO2 fibers were smaller due to the SiO2 component. The 1TiO2–1SiO2 fibers were quasi-amorphous. Rutile TiO2 nanorods were grown on the fibers by a hydrothermal method. The rods seemed to grow only on the TiO2 domains of the fiber surface, which affected their size and morphology. In batch adsorption experiments all the fibers had excellent Sr2+ uptake with the hydrothermally modified TiO2 fibers having the highest distribution coefficient (Kd) of 3,490,000 mL g−1. The results show that both anatase and rutile TiO2 can efficiently adsorb Sr2+ from an aqueous environment. Hardly any damage was observed in the nanorods on the TiO2 fibers in a column operation test with flow rates up to 74 mL h−1 which is promising for the use of the fibers in industrial column mode wastewater treatment.http://www.sciencedirect.com/science/article/pii/S2666821122001946ElectroblowingTitanium dioxide submicron fibersTitania/silica composite fibersHydrothermal synthesisRutile titania nanorodsStrontium separation |
| spellingShingle | Johanna Paajanen Lauri Pettilä Satu Lönnrot Mikko Heikkilä Timo Hatanpää Mikko Ritala Risto Koivula Electroblown titanium dioxide and titanium dioxide/silicon dioxide submicron fibers with and without titania nanorod layer for strontium(II) uptake Chemical Engineering Journal Advances Electroblowing Titanium dioxide submicron fibers Titania/silica composite fibers Hydrothermal synthesis Rutile titania nanorods Strontium separation |
| title | Electroblown titanium dioxide and titanium dioxide/silicon dioxide submicron fibers with and without titania nanorod layer for strontium(II) uptake |
| title_full | Electroblown titanium dioxide and titanium dioxide/silicon dioxide submicron fibers with and without titania nanorod layer for strontium(II) uptake |
| title_fullStr | Electroblown titanium dioxide and titanium dioxide/silicon dioxide submicron fibers with and without titania nanorod layer for strontium(II) uptake |
| title_full_unstemmed | Electroblown titanium dioxide and titanium dioxide/silicon dioxide submicron fibers with and without titania nanorod layer for strontium(II) uptake |
| title_short | Electroblown titanium dioxide and titanium dioxide/silicon dioxide submicron fibers with and without titania nanorod layer for strontium(II) uptake |
| title_sort | electroblown titanium dioxide and titanium dioxide silicon dioxide submicron fibers with and without titania nanorod layer for strontium ii uptake |
| topic | Electroblowing Titanium dioxide submicron fibers Titania/silica composite fibers Hydrothermal synthesis Rutile titania nanorods Strontium separation |
| url | http://www.sciencedirect.com/science/article/pii/S2666821122001946 |
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