A structurally modified 85SiO2–9P2O5–6TiO2 system and its dynamic dielectric behavior–a starting point for hydrogen detection
Novel proton conducting materials with composition 85SiO2–9P2O5–6TiO2, modified by addition of liquid xH3PO4 in different amounts xH3PO4 = 0; 17; 35; 52 mmol, were synthesized via sol–gel route. XRD patterns show amorphous nature for “pure” (xH3PO4 = 0 mmol) sample and crystalline for all H3PO4-dope...
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Elsevier
2021-01-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785420321128 |
| _version_ | 1818447639736221696 |
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| author | O. Kostadinova V. Boev V. Ilcheva B. Burdin T. Petkova L.C. Costa |
| author_facet | O. Kostadinova V. Boev V. Ilcheva B. Burdin T. Petkova L.C. Costa |
| author_sort | O. Kostadinova |
| collection | DOAJ |
| description | Novel proton conducting materials with composition 85SiO2–9P2O5–6TiO2, modified by addition of liquid xH3PO4 in different amounts xH3PO4 = 0; 17; 35; 52 mmol, were synthesized via sol–gel route. XRD patterns show amorphous nature for “pure” (xH3PO4 = 0 mmol) sample and crystalline for all H3PO4-doped samples. FTIR and SEM analysis revealed that this modification led to appreciable structural changes on molecular level and morphology, which, heavily impacts the water intake ability, impedance behavior as well as the dielectric parameters. The detailed impedance examination showed distinct response of changing parameters such as relative humidity and temperature, while the dielectric parameters derived from the impedance spectra, provide in-depth understanding of proton conduction dynamic. Based on these observations different models were proposed gathering proton transfer in humid and dry atmospheres. The enhanced proton conduction is a basic requirement for successful usage of the material for hydrogen gas detection. |
| first_indexed | 2024-12-14T20:06:49Z |
| format | Article |
| id | doaj.art-30e0774543d0422db50deeb75e35f65b |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-14T20:06:49Z |
| publishDate | 2021-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-30e0774543d0422db50deeb75e35f65b2022-12-21T22:49:00ZengElsevierJournal of Materials Research and Technology2238-78542021-01-0110624631A structurally modified 85SiO2–9P2O5–6TiO2 system and its dynamic dielectric behavior–a starting point for hydrogen detectionO. Kostadinova0V. Boev1V. Ilcheva2B. Burdin3T. Petkova4L.C. Costa5Department of Solid State Electrolytes, Institute of Electrochemistry and Energy Systems Acad. Evgeni Budevsky, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl 10, Sofia, 1113, Bulgaria; Corresponding author.Department of Solid State Electrolytes, Institute of Electrochemistry and Energy Systems Acad. Evgeni Budevsky, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl 10, Sofia, 1113, BulgariaDepartment of Solid State Electrolytes, Institute of Electrochemistry and Energy Systems Acad. Evgeni Budevsky, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl 10, Sofia, 1113, BulgariaDepartment of Electrochemical Methods, Institute of Electrochemistry and Energy Systems Acad. Evgeni Budevsky, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl 10, Sofia, 1113, BulgariaDepartment of Solid State Electrolytes, Institute of Electrochemistry and Energy Systems Acad. Evgeni Budevsky, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl 10, Sofia, 1113, BulgariaI3N and Physics Department, University of Aveiro, Aveiro, 3810-193, PortugalNovel proton conducting materials with composition 85SiO2–9P2O5–6TiO2, modified by addition of liquid xH3PO4 in different amounts xH3PO4 = 0; 17; 35; 52 mmol, were synthesized via sol–gel route. XRD patterns show amorphous nature for “pure” (xH3PO4 = 0 mmol) sample and crystalline for all H3PO4-doped samples. FTIR and SEM analysis revealed that this modification led to appreciable structural changes on molecular level and morphology, which, heavily impacts the water intake ability, impedance behavior as well as the dielectric parameters. The detailed impedance examination showed distinct response of changing parameters such as relative humidity and temperature, while the dielectric parameters derived from the impedance spectra, provide in-depth understanding of proton conduction dynamic. Based on these observations different models were proposed gathering proton transfer in humid and dry atmospheres. The enhanced proton conduction is a basic requirement for successful usage of the material for hydrogen gas detection.http://www.sciencedirect.com/science/article/pii/S2238785420321128Phosphoric acid-doped SiO2–P2O5–TiO2 systemSol–gelImpedance spectroscopyDielectric relaxationHydrogen detectionInfrared structural study |
| spellingShingle | O. Kostadinova V. Boev V. Ilcheva B. Burdin T. Petkova L.C. Costa A structurally modified 85SiO2–9P2O5–6TiO2 system and its dynamic dielectric behavior–a starting point for hydrogen detection Journal of Materials Research and Technology Phosphoric acid-doped SiO2–P2O5–TiO2 system Sol–gel Impedance spectroscopy Dielectric relaxation Hydrogen detection Infrared structural study |
| title | A structurally modified 85SiO2–9P2O5–6TiO2 system and its dynamic dielectric behavior–a starting point for hydrogen detection |
| title_full | A structurally modified 85SiO2–9P2O5–6TiO2 system and its dynamic dielectric behavior–a starting point for hydrogen detection |
| title_fullStr | A structurally modified 85SiO2–9P2O5–6TiO2 system and its dynamic dielectric behavior–a starting point for hydrogen detection |
| title_full_unstemmed | A structurally modified 85SiO2–9P2O5–6TiO2 system and its dynamic dielectric behavior–a starting point for hydrogen detection |
| title_short | A structurally modified 85SiO2–9P2O5–6TiO2 system and its dynamic dielectric behavior–a starting point for hydrogen detection |
| title_sort | structurally modified 85sio2 9p2o5 6tio2 system and its dynamic dielectric behavior a starting point for hydrogen detection |
| topic | Phosphoric acid-doped SiO2–P2O5–TiO2 system Sol–gel Impedance spectroscopy Dielectric relaxation Hydrogen detection Infrared structural study |
| url | http://www.sciencedirect.com/science/article/pii/S2238785420321128 |
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