| Summary: | 碩士 === 中原大學 === 化學研究所 === 106 === In this study, a novel aluminum metal-organic framework (MIL-68-NDC) was synthesized that was constructed with aluminum metal ion and 2,6-naphthalene dicarboxylic acid. The syn-thetic conditions were optimized such as the ratio of metal and ligand, heating methods, clean-ing methods or heating temperature. From the results, the powder X-ray diffraction (PXRD) patterns of experimental MIL-68-NDC were similar to the simulated pattern of MIL-68-NDC, and MIL-68-NDC has the triangular window and hexagonal window pores, the pore size is 11.2 Å and 18.8 Å, respectively, the surface area was 1912 m2/g. Subsequently, MIL-68-NDC were mixed with activated carbon (AC) and applied to ophosphorus pesticide extraction. The recovery of organophosphorus pesticides was im-proved by optimizing the extraction conditions (solvent types, solvent concentration) and the best extraction recovery was 81.2 to 94.5%, the limit of detection was 0.009 to 0.018 mgL 1, the intra-day recovery was 79.6 to 90.3% (RSD = 0.21 to 1.44%), the inter-day recovery was 81.1 to 90.6% (RSD = 0.33 to 1.75%) and the re-covery of batch to batch was 79.7 to 93.3% (RSD = 0.63 to 1.94%) that demonstrated a good reproducibility and stability for the composites. Furthermore, the composites could be used 50 times at least, the recovery of the 50th time was 80.7~93.7% (RSD = 0.91~1.39%), similar to the 1st extraction efficiency. Thus, the developed composites could reduce the cost. Finally, the material was applied to real samples (farmland water and washing vegetable water) determina-tion, and the recovery was 85.8 to 98.7% (RSD = 0 to 0.6%) and 82.3 to 95.4% (RSD = 0.1 to 0.8), respectively.
In this study, the extraction efficiency was enhanced by adjusting the material property that was mixed with MIL-68-NDC and AC. The ease preparation, cheap, high extraction perfor-mance and reusability were obtained from the incorporation materials. In the future, it has a greate potential in extracted materials field.
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