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Title
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Multi-functional fluorinated NiTiO3 perovskites for CO2 photocatalytic reduction, electrocatalytic water splitting, and biomedical waste management
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Type
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JournalPaper
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Keywords
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NiTiO3 Fluorine doping, CO2 reduction Biomedical wastewater Electrocatalytic water splitting
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Abstract
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Multi-functional F-doped NiTiO3 structures with high stability were prepared by a template-free hydrothermal method. A multi-technique approach including several physicochemical techniques was employed to describe the morphology, electronic properties, and structural characters. The F-doped NiTiO3 catalyst showed a much higher CO2 to CH4 photocatalytic conversion rate (2.6 μmol g-1 h-1) than pristine NiTiO3 (1.6 μmol g-1 h-1), highlighting the key role of F impurities in suppressing the charge carriers recombination. In addition to the higher efficiency and reusability than Pt/C reference electrode towards electrocatalytic water splitting, a lower Tafel slope was recorded for the F-doped structure (81.2 mV dec-1). This implies significant improvement in the reaction kinetics, arising from the synergistic effects between the F sites and bulk constituents to supply more desired active electronic states. The capability of the structures for the biomedical wastewater (containing the Caco-2 cancer cells) treatment was also explored. According to several biochemical assays, the fluorinated material shows a promising performance against the tumor cells at its IC50 concentration, 0.15 µg/mL, in a typical hospital wastewater. Our results pave the way for developing novel multi-functional photoactive titanate perovskites aiming at future clean energy transition.
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Researchers
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Chuanyi Wang (Not In First Six Researchers), A Tahira (Not In First Six Researchers), Zafar.H Ibupto (Not In First Six Researchers), Michela Signoretto (Not In First Six Researchers), Masoud Baghernejad (Not In First Six Researchers), Saeed Karima (Not In First Six Researchers), Zahra Shahsavari (Not In First Six Researchers), Karim Kakaei (Fifth Researcher), sima hajiahmadi (Fourth Researcher), shahnaz ghasemi (Third Researcher), Mohsen Padervand (Second Researcher), Elmuez Dawi (First Researcher)
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