Facet‐Dependent Interfacial and Photoelectrochemical Properties of TiO2 Nanoparticles
Abstract The photoelectrochemical properties of titanium dioxide (TiO2) nanoparticles are directly related to the presence of certain facets. The synthesis of such particles is challenged using volatile and sensitive precursors utilizing shape capping agents. In this study, an easier two‐step synthe...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2023-11-01
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| Series: | Advanced Materials Interfaces |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/admi.202300555 |
| _version_ | 1827774569499328512 |
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| author | Mohammed Ahmed Zabara Begüm Yarar Kaplan Selmiye Alkan Gürsel Alp Yürüm |
| author_facet | Mohammed Ahmed Zabara Begüm Yarar Kaplan Selmiye Alkan Gürsel Alp Yürüm |
| author_sort | Mohammed Ahmed Zabara |
| collection | DOAJ |
| description | Abstract The photoelectrochemical properties of titanium dioxide (TiO2) nanoparticles are directly related to the presence of certain facets. The synthesis of such particles is challenged using volatile and sensitive precursors utilizing shape capping agents. In this study, an easier two‐step synthesis technique for the preparation of well‐specified morphology TiO2 nanocrystals from TiO2 powder is demonstrated. The facet‐dependent Fermi level and flat band potential of the prepared particles are calculated and their photoelectrochemical properties are investigated by Cu2+ and Pb2+ photo/electrodeposition. From Cu2+ electrodeposition, it is shown that the presence of {100} and {001} facets in cubic morphology facilitates the electrodeposition with progressive nucleation mechanisms, while the presence of {101} facet in octahedral geometry follows instantaneous nucleation mechanisms. The activity of electroreduction is also related to the flat‐band potential which shows the highest activity in Pb2+ electrodeposition for octahedron nanostructure due to the alignment of the reduction potential to the edge of the flat band. Photodeposition of Cu2+ and Pb2+ ions shows identical trends to electrodeposition indicating the facets influence in ion adsorption and structure of the bandgap of morphological TiO2. The findings emphasize the importance of facet‐dependent surface adsorption and bandgap structure designing faceted TiO2 nanoparticles for tailored applications. |
| first_indexed | 2024-03-11T13:40:13Z |
| format | Article |
| id | doaj.art-4c1f247e993849769bec4f82dfa52588 |
| institution | Directory Open Access Journal |
| issn | 2196-7350 |
| language | English |
| last_indexed | 2024-03-11T13:40:13Z |
| publishDate | 2023-11-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Materials Interfaces |
| spelling | doaj.art-4c1f247e993849769bec4f82dfa525882023-11-02T13:42:59ZengWiley-VCHAdvanced Materials Interfaces2196-73502023-11-011031n/an/a10.1002/admi.202300555Facet‐Dependent Interfacial and Photoelectrochemical Properties of TiO2 NanoparticlesMohammed Ahmed Zabara0Begüm Yarar Kaplan1Selmiye Alkan Gürsel2Alp Yürüm3Sabanci University SUNUM Nanotechnology Research Centre Istanbul 34956TurkeySabanci University SUNUM Nanotechnology Research Centre Istanbul 34956TurkeySabanci University SUNUM Nanotechnology Research Centre Istanbul 34956TurkeySabanci University SUNUM Nanotechnology Research Centre Istanbul 34956TurkeyAbstract The photoelectrochemical properties of titanium dioxide (TiO2) nanoparticles are directly related to the presence of certain facets. The synthesis of such particles is challenged using volatile and sensitive precursors utilizing shape capping agents. In this study, an easier two‐step synthesis technique for the preparation of well‐specified morphology TiO2 nanocrystals from TiO2 powder is demonstrated. The facet‐dependent Fermi level and flat band potential of the prepared particles are calculated and their photoelectrochemical properties are investigated by Cu2+ and Pb2+ photo/electrodeposition. From Cu2+ electrodeposition, it is shown that the presence of {100} and {001} facets in cubic morphology facilitates the electrodeposition with progressive nucleation mechanisms, while the presence of {101} facet in octahedral geometry follows instantaneous nucleation mechanisms. The activity of electroreduction is also related to the flat‐band potential which shows the highest activity in Pb2+ electrodeposition for octahedron nanostructure due to the alignment of the reduction potential to the edge of the flat band. Photodeposition of Cu2+ and Pb2+ ions shows identical trends to electrodeposition indicating the facets influence in ion adsorption and structure of the bandgap of morphological TiO2. The findings emphasize the importance of facet‐dependent surface adsorption and bandgap structure designing faceted TiO2 nanoparticles for tailored applications.https://doi.org/10.1002/admi.202300555anataseexposed facetsflat‐band potentialinterfacephotoreductionTiO2 |
| spellingShingle | Mohammed Ahmed Zabara Begüm Yarar Kaplan Selmiye Alkan Gürsel Alp Yürüm Facet‐Dependent Interfacial and Photoelectrochemical Properties of TiO2 Nanoparticles Advanced Materials Interfaces anatase exposed facets flat‐band potential interface photoreduction TiO2 |
| title | Facet‐Dependent Interfacial and Photoelectrochemical Properties of TiO2 Nanoparticles |
| title_full | Facet‐Dependent Interfacial and Photoelectrochemical Properties of TiO2 Nanoparticles |
| title_fullStr | Facet‐Dependent Interfacial and Photoelectrochemical Properties of TiO2 Nanoparticles |
| title_full_unstemmed | Facet‐Dependent Interfacial and Photoelectrochemical Properties of TiO2 Nanoparticles |
| title_short | Facet‐Dependent Interfacial and Photoelectrochemical Properties of TiO2 Nanoparticles |
| title_sort | facet dependent interfacial and photoelectrochemical properties of tio2 nanoparticles |
| topic | anatase exposed facets flat‐band potential interface photoreduction TiO2 |
| url | https://doi.org/10.1002/admi.202300555 |
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