2018 Fiscal Year Annual Research Report
Synthesis of MOF@clay composites photocatalysts for environmental remediation
| Project/Area Number |
17F17355
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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) |
PAWAR RADHESHYAM 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) |
2017-11-10 – 2020-03-31
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| Keywords | 金属有機構造体 / 粘土鉱物 / 環境修復材 / CO2 |
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| Outline of Annual Research Achievements |
Most metal organic frameworks (MOFs) have been developed for gas storage not for water treatment. As the first step, we have mainly focused on synthetic process of Zr-fumarate MOFs, which are highly stable in aqueous solutions. We tried more than 100 synthetic conditions with the different parameters: linker species, linker concentrations, reaction time, reaction temperatures in microwave-assisted rapid water-based synthesis. As a result, the synthetic condition has been optimized. The product was applied to the popular CO2 and water vapor adsorption study. Additionally, we have evaluated the adsorption efficiencies of hazardous oxyanions species such as selenite (Se(IV)), selenate (Se(VI)), antimonite (Sb(III)) and antimonate (Sb(V)) on these developed MOFs in the aqueous environments, which have been rarely studied. The combination of the microwave-assisted heating and modulated water based hydrothermal synthesis succeeded to form highly stable MOFs showing superior adsorbent behavior of CO2, water vapor, and selenium oxyanions.
We extended to another synthetic method which is ultrasonication assisted facile synthesis of Zr-MOFs for adsorption characteristics of CO2, water vapor, and Sb(III), Sb(V) species. We have successfully established new approached developed MOFs for adsorptive removal of CO2, water vapor, and antimonite (Sb(III)) and antimonate (Sb(V)) from the aqueous environments.
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| Current Status of Research Progress |
Current Status of Research Progress
3: Progress in research has been slightly delayed.
Reason
We have spent longer time to synthesize water based MOFs than expected. Synthesis of MOF-clay composites have not yet been tried. But we finally succeed to synthesize water based MOFs after more than 100 trials to go to the next step.
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| Strategy for Future Research Activity |
We need to accelerate for the development of novel MOF@CLAY composites by the green synthetic approach and their application for the development of novel photocatalysts for environmental remediation. Based on the last fiscal year achievements, we are proposing microwave-assisted synthesis of Zr-UIO66-NH2@sepiolite clay composite (1) for visible-light-driven photocatalytic activity toward degradation of dye molecules, and (2) for selective extraction of Pd/ Pt from highly acidic solution and reusability of highly dispersed Pd/Pt nanoparticles anchored on UiO-66-NH2@sepiolite composite residue as a reusable visible-light-driven photocatalyst for reduction of Cr(VI).
Facile synthesis and characterization of highly stable Zr-UIO66-NH2@sepiolite composites and evaluation of photocatalytic activity toward RhB dye (Apr-June), selective extraction of Pd/Pt from the highly acidic solution (July).
Optimization of reduction conditions to convert highly dispersed Pd/Pt nanoparticles on UiO-66(NH2)@sepiolite composite and characterization (Aug-Sep).
Application of nanoparticle Pd/Pt decorated MOF@Clay composites for Cr(VI) reduction. A compilation of reports and, publishing research manuscripts (Oct-Nov).
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Research Products
(5 results)
