2019 Fiscal Year Annual Research Report
Visible light driven photocatalyst for degradation of pharmaceutical wastewaters
| Project/Area Number |
18F18387
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| Research Institution | Kyushu University |
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Principal Investigator |
笹木 圭子 九州大学, 工学研究院, 教授 (30311525)
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| Co-Investigator(Kenkyū-buntansha) |
SEKAR KARTHIKEYAN 九州大学, 工学(系)研究科(研究院), 外国人特別研究員
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| Project Period (FY) |
2018-11-09 – 2021-03-31
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| Keywords | Core-shell structure / Cu/Cu2O photocatalyst / visible light |
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| Outline of Annual Research Achievements |
Here we report the mild, hydrothermal (template-free) synthesis of core-shell Cu2O(Cu)@CuO photocatalytic architectures for the visible light photocatalytic degradation of N-acetyl-para-aminophenol (APAP). Hollow and rattle-like core-shell nanosphere aggregates with diameters between 200 nm and 2.5 mm formed under different synthesis conditions; all comprised an inner Cu2O shell, formed of 10-50 nm nanoparticles, surrounded by a protective corona of CuO nanoparticles. High reductant and structure-directing agent concentrations promoted the formation of a yolk-like Cu2O/Cu core, associated with improved photophysical properties, notably a high oxidation potential and suppressed charge carrier recombination, that correlated with the highest apparent quantum efficiency (8%) and rate of APAP removal (7 mmol g-1 min-1 ). Trapping experiments demonstrated hydroxyl radicals were the primary active species responsible for APAP oxidation to quinones and short chain carboxylic acids. Rattle-like core-shell Cu2O/Cu@CuO nanospheres exhibited excellent physiochemical stability and recyclability for APAP photocatalytic degradation.
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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
One paper was published in JMCA.
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| Strategy for Future Research Activity |
Ongoing investigations aim to elucidate the relative importance of core-shell nanosphere morphology and composition to further enhance visible light absorption, charge separation and mobility, and ultimately photocatalytic efficiency for organic micropollutant degradation and solar fuels production.
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Research Products
(2 results)
