Fabrication, characterization, and photovoltaic performance of titanium dioxide/metal-organic framework composite
The titanium dioxide-metal-organic framework (TiO2−MOF) composite was prepared using the sol-gel method for photovoltaic applications. Raman analyses showed the presence of MOF clusters in the TiO2 sol-gel network. Using the Brunauer-Emmett-Teller method, the resultant composite material exhibited a...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Journal of Photochemistry and Photobiology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666469022000355 |
| _version_ | 1811202155117281280 |
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| author | Phuti S. Ramaripa Kwena D. Modibane Katlego Makgopa Ostar A. Seerane Manoko S. Maubane-Nkadimeng Edwin Makhado Mpitloane J. Hato Morongwa E. Ramoroka Kerileng M. Molapo Deepanraj Balakrishnan Emmanuel I. Iwuoha |
| author_facet | Phuti S. Ramaripa Kwena D. Modibane Katlego Makgopa Ostar A. Seerane Manoko S. Maubane-Nkadimeng Edwin Makhado Mpitloane J. Hato Morongwa E. Ramoroka Kerileng M. Molapo Deepanraj Balakrishnan Emmanuel I. Iwuoha |
| author_sort | Phuti S. Ramaripa |
| collection | DOAJ |
| description | The titanium dioxide-metal-organic framework (TiO2−MOF) composite was prepared using the sol-gel method for photovoltaic applications. Raman analyses showed the presence of MOF clusters in the TiO2 sol-gel network. Using the Brunauer-Emmett-Teller method, the resultant composite material exhibited a surface area of 111.10 m2 g−1 as compared to the surface area values of 262.90 and 464.76 m2 g−1 for TiO2 and MOF, respectively. The small optical band gap values of 2.63 for direct electronic transition and 2.70 eV for indirect allowed electronic transition in TiO2/MOF composite were observed using ultraviolet-visible supported by cyclic voltammetry (CV). The chronoamperometry (CA) results showed the current drop of 0.21 mA observed at 0.025 s for TiO2 and the current drop of1.00 mA for MOF and 1.4 mA for TiO2−MOF composite at 0.3 s. The stability of the composite was achieved through the synergistic effect of MOF on TiO2 which resulted in a high current density. Electrochemical impedance spectroscopy showed a fast electron transfer as well as high ionic conductivity. The overall power conversion efficiency of 0.722% along with a photocurrent density of 0.46 mA cm−2 was achieved for the composite. The approach proposed in this work is facile and can be used for the large-scale fabrication of efficient and flexible photoanode electrodes for photovoltaic applications. |
| first_indexed | 2024-04-12T02:35:27Z |
| format | Article |
| id | doaj.art-51c12d985dcd48bda81003dd18d0a77b |
| institution | Directory Open Access Journal |
| issn | 2666-4690 |
| language | English |
| last_indexed | 2024-04-12T02:35:27Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Photochemistry and Photobiology |
| spelling | doaj.art-51c12d985dcd48bda81003dd18d0a77b2022-12-22T03:51:36ZengElsevierJournal of Photochemistry and Photobiology2666-46902022-12-0112100142Fabrication, characterization, and photovoltaic performance of titanium dioxide/metal-organic framework compositePhuti S. Ramaripa0Kwena D. Modibane1Katlego Makgopa2Ostar A. Seerane3Manoko S. Maubane-Nkadimeng4Edwin Makhado5Mpitloane J. Hato6Morongwa E. Ramoroka7Kerileng M. Molapo8Deepanraj Balakrishnan9Emmanuel I. Iwuoha10Nanotechnology Research Group, Department of Chemistry, School of Physical and Mineral Sciences, University of Limpopo (Turfloop), 0727 Polokwane, Sovenga, South AfricaNanotechnology Research Group, Department of Chemistry, School of Physical and Mineral Sciences, University of Limpopo (Turfloop), 0727 Polokwane, Sovenga, South Africa; Corresponding author.Department of Chemistry, Faculty of Science, Tshwane University of Technology (Arcadia Campus), 0001 Pretoria, South AfricaDepartment of Chemistry, Faculty of Science, Tshwane University of Technology (Arcadia Campus), 0001 Pretoria, South AfricaDSI-NRF Centre of Excellence in Strong Materials, School of Chemistry, University of Witwatersrand, Private Bag X3, Wits, 2050, Johannesburg, South AfricaNanotechnology Research Group, Department of Chemistry, School of Physical and Mineral Sciences, University of Limpopo (Turfloop), 0727 Polokwane, Sovenga, South AfricaNanotechnology Research Group, Department of Chemistry, School of Physical and Mineral Sciences, University of Limpopo (Turfloop), 0727 Polokwane, Sovenga, South AfricaSensorLab, Chemical Science Department, University of the Western Cape, 7535,Bellville, Cape Town, South AfricaSensorLab, Chemical Science Department, University of the Western Cape, 7535,Bellville, Cape Town, South AfricaDepartment of Mechanical Engineering, College of Engineering, Prince Mohammad Bin Fahd University, 31952, Al-Khobar, Saudi ArabiaSensorLab, Chemical Science Department, University of the Western Cape, 7535,Bellville, Cape Town, South AfricaThe titanium dioxide-metal-organic framework (TiO2−MOF) composite was prepared using the sol-gel method for photovoltaic applications. Raman analyses showed the presence of MOF clusters in the TiO2 sol-gel network. Using the Brunauer-Emmett-Teller method, the resultant composite material exhibited a surface area of 111.10 m2 g−1 as compared to the surface area values of 262.90 and 464.76 m2 g−1 for TiO2 and MOF, respectively. The small optical band gap values of 2.63 for direct electronic transition and 2.70 eV for indirect allowed electronic transition in TiO2/MOF composite were observed using ultraviolet-visible supported by cyclic voltammetry (CV). The chronoamperometry (CA) results showed the current drop of 0.21 mA observed at 0.025 s for TiO2 and the current drop of1.00 mA for MOF and 1.4 mA for TiO2−MOF composite at 0.3 s. The stability of the composite was achieved through the synergistic effect of MOF on TiO2 which resulted in a high current density. Electrochemical impedance spectroscopy showed a fast electron transfer as well as high ionic conductivity. The overall power conversion efficiency of 0.722% along with a photocurrent density of 0.46 mA cm−2 was achieved for the composite. The approach proposed in this work is facile and can be used for the large-scale fabrication of efficient and flexible photoanode electrodes for photovoltaic applications.http://www.sciencedirect.com/science/article/pii/S2666469022000355ElectrochemistryMetal-organic frameworksCompositeTitanium dioxidePhotovoltaic studies |
| spellingShingle | Phuti S. Ramaripa Kwena D. Modibane Katlego Makgopa Ostar A. Seerane Manoko S. Maubane-Nkadimeng Edwin Makhado Mpitloane J. Hato Morongwa E. Ramoroka Kerileng M. Molapo Deepanraj Balakrishnan Emmanuel I. Iwuoha Fabrication, characterization, and photovoltaic performance of titanium dioxide/metal-organic framework composite Journal of Photochemistry and Photobiology Electrochemistry Metal-organic frameworks Composite Titanium dioxide Photovoltaic studies |
| title | Fabrication, characterization, and photovoltaic performance of titanium dioxide/metal-organic framework composite |
| title_full | Fabrication, characterization, and photovoltaic performance of titanium dioxide/metal-organic framework composite |
| title_fullStr | Fabrication, characterization, and photovoltaic performance of titanium dioxide/metal-organic framework composite |
| title_full_unstemmed | Fabrication, characterization, and photovoltaic performance of titanium dioxide/metal-organic framework composite |
| title_short | Fabrication, characterization, and photovoltaic performance of titanium dioxide/metal-organic framework composite |
| title_sort | fabrication characterization and photovoltaic performance of titanium dioxide metal organic framework composite |
| topic | Electrochemistry Metal-organic frameworks Composite Titanium dioxide Photovoltaic studies |
| url | http://www.sciencedirect.com/science/article/pii/S2666469022000355 |
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