Upcycling of Ca-rich residues after Fe recovery from steel slag into photocatalyst composites for H2 evolution and carbon negative
| Project/Area Number |
23K17064
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 64030:Environmental materials and recycle technology-related
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| Research Institution | Kyushu University |
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Principal Investigator |
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| Project Period (FY) |
2023-04-01 – 2025-03-31
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| Project Status |
Granted (Fiscal Year 2023)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2024: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2023: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
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| Keywords | Calcium oxalate / Fe-doped hydroxyapatite / Photocatalyst / Hydrogen evolution / carbon negative / Carbon nitride / Hydroxyapatite |
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| Outline of Research at the Start |
Upcycling of secondary Ca oxalate residue from converter slag to fabricate Fe-doped hydroxyapatite (Fe-HAp). Further, Fe-HAp will be combined with C3N4 to improve optical properties and applied to H2 evolution and CO2 reduction supporting sustainable development of alternative energy and chemicals.
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| Outline of Annual Research Achievements |
Currently, iron oxalate dihydrate (abbreviated as FOD-ore) was synthesized from iron ore using a process involving oxalic acid for iron extraction, followed by photo-reduction. Various analytical techniques were employed to characterize the physicochemical properties of the FOD-ore sample. The FOD-ore was tested for its ability to catalyze the degradation of rhodamine B (RhB), a representative organic pollutant found in wastewater. The results revealed that the FOD-ore could degrade over 85% of RhB faster than that achieved with FOD alone. Additionally, the remaining calcium oxalate was used as a calcium source to produce Fe-doped hydroxyapatite as a photocatalyst. The obtained Fe-doped hydroxyapatite was characterized by several methods and will be used for photocatalytic H2 evolution.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
This research project is advancing according to our strategy, which involves extracting calcium oxalate from slag and utilizing it as a calcium source to fabricate photocatalysts. Furthermore, we have employed these newly obtained photocatalysts to initiate the degradation of organic pollutants, marking the initial phase of assessing their photocatalytic effectiveness.
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| Strategy for Future Research Activity |
Our next step involves creating a composite material by combining Fe-doped hydroxyapatite derived from slag with C3N4, which will then be utilized for testing its photocatalytic efficiency in hydrogen (H2) evolution. This experimentation aims to assess the performance of the synthesized samples in catalyzing the generation of hydrogen through photocatalysis. Additionally, we will explore various conditions and parameters during the composite fabrication process and H2 evolution testing to identify optimal conditions for maximizing the performance of the resulting sample.
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Report
(1 results)
Research Products
(4 results)
