Zr-MOFs loaded on polyurethane foam by polydopamine for enhanced dye adsorption
| Autor: | Hongwei Yu, Shaoping Qian, Jingjing Zhao, Yaozhuo Su, Yongqing Zhao, Wenge Zheng, Hui Liu, Linqiong Xu |
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| Rok vydání: | 2021 |
| Předmět: |
Indoles
Environmental Engineering Materials science Polymers Polyurethanes Nanoparticle 02 engineering and technology 010402 general chemistry 01 natural sciences chemistry.chemical_compound Adsorption Specific surface area Rhodamine B Environmental Chemistry Hydrothermal synthesis Crystal violet Coloring Agents General Environmental Science Polyurethane Substrate (chemistry) General Medicine 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Chemical engineering 0210 nano-technology |
| Zdroj: | Journal of Environmental Sciences. 101:177-188 |
| ISSN: | 1001-0742 |
| DOI: | 10.1016/j.jes.2020.08.021 |
| Popis: | Zirconium-based metal-organic frameworks (Zr-MOFs) have attracted widespread attention due to their high specific surface area, high porosity, abundant metal active sites and excellent hydrothermal stability. However, Zr-MOFs materials are mostly powdery in nature and thus difficult to separate from aqueous media, which limits their application in wastewater treatment. In this study, PDA/Zr-MOFs/PU foam was constructed by growing Zr-MOFs nanoparticles on a dopamine-modified polyurethane foam substrate by in-situ hydrothermal synthesis as an adsorbent for removing dyes from wastewater. The results demonstrated that the polydopamine coating improves the dispersion of the Zr-MOFs nanoparticles on the substrate and enhances the interaction between the Zr-MOFs nanoparticles and the PU foam substrate. As a result, compared with Zr-MOFs/PU foam, the prepared PDA/Zr-MOFs/PU foam exhibits higher adsorption capacity for crystal violet (CV) (63.38 mg/g) and rhodamine B (RB) (67.73 mg/g), with maximum adsorption efficiencies of CV and RB of 98.4% (pH=11) and 93.5% (pH=7), respectively, at a concentration of 10 mg/L. The PDA/Zr-MOFs/PU foam can simultaneously remove CV and RB from the mixed solution. Moreover, the PDA/Zr-MOFs/PU foam still exhibits high stability and reusability after five cycles. |
| Databáze: | OpenAIRE |
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