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Defect-engineered m...
Defect-engineered metal-organic frameworks (MOF-808) towards the improved adsorptive removal of organic dyes and chromium (vi) species from water
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- Nguyen, Khoa D. (författare)
- Ho Chi Minh City University of Technology (HCMUT),Vietnam National University
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- Vo, Nhi T. (författare)
- Vietnam National University,Ho Chi Minh City University of Technology (HCMUT)
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- Le, Khanh T.M. (författare)
- Ho Chi Minh City University of Technology (HCMUT),Vietnam National University
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- Ho, Khanh V. (författare)
- Vietnam National University,Ho Chi Minh City University of Technology (HCMUT)
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- Phan, Nam T.S. (författare)
- Vietnam National University,Ho Chi Minh City University of Technology (HCMUT)
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- Ho, Hoang Phuoc, 1983 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Le, Ha V. (författare)
- Ho Chi Minh City University of Technology (HCMUT),Vietnam National University
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(creator_code:org_t)
- 2023
- 2023
- Engelska.
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Ingår i: New Journal of Chemistry. - : Royal Society of Chemistry (RSC). - 1369-9261 .- 1144-0546. ; 47:13, s. 6433-6447
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https://research.cha... (primary) (free)
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https://doi.org/10.1...
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https://research.cha...
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Abstract
Ämnesord
Stäng
- In this work, two defective zirconium-based metal-organic frameworks (Zr-MOFs), MOF-808-OH and MOF-808-NH2, were synthesized by partially replacing the 1,3,5-benzenetricarboxylate building block with 5-hydroxyisophthalate and 5-aminoisophthalate, respectively. The structural features of the defective materials were analyzed by powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), nitrogen physisorption at 77 K, and thermogravimetric analysis (TGA). Importantly, the number of defect sites determined via proton nuclear magnetic resonance (1H-NMR) analysis of the digested materials was approximately 7 mol% for MOF-808-OH and 3 mol% for MOF-808-NH2. The presence of the defect sites increased the number of acidic centers on Zr-clusters originating from missing-linker nodes which accounted for a remarkable adsorption capacity towards various anionic organic dyes and chromium (vi) species. Compared to standard MOF-808, the defect-engineered ones showed significant increments by 30-60% in trapping capacity for anionic contaminants including sunset yellow, quinoline yellow, methyl orange, and potassium dichromate, while they exhibited modest improvements by 5-15% in the removal of cationic dyes, namely malachite green and methylene blue.
Ämnesord
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Industriell bioteknik -- Biokemikalier (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Industrial Biotechnology -- Biochemicals (hsv//eng)
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
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