Removal of Hg2+ in wastewater by grafting nitrogen/sulfur-containing molecule onto Uio-66-NH2: from synthesis to adsorption studies

Ruan, Wei; Hao, W.; Qi, Yuan; Yang, Hongmin

doi:10.1007/s11356-022-23255-7

Cited by 5 publications

(3 citation statements)

References 66 publications

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“…The energy-dispersive system (EDS, Figure S12) revealed that Hg was uniformly distributed on UiO-66-NH 2 @AuNCs/ZIF-8 after adsorption, confirming the successful loading of Hg 2+ . Upon the adsorption of Hg 2+ , the characteristic peak at 756 cm –1 which corresponded to the N–H wagging bandweakened markedly, which was attributed to the coordination of N in UiO-66-NH 2 and Hg 2+ (Figure A). ,, Additionally, the C–N stretching on the imidazole rings, corresponding to the peak at 1142 cm –1 , also weakened, which was because of the coordination of N in ZIF-8 and Hg 2+ . , The UiO-66-NH 2 @AuNCs/ZIF-8 X-ray photoelectron spectroscopy (XPS) data were also analyzed before and after the adsorption of Hg 2+ . As shown in Figure B, two new peaks, corresponding to Hg 4f 5/2 and Hg 4f 7/2 , respectively, were observed in the Hg 4f spectrum of UiO-66-NH 2 @AuNCs/ZIF-8-Hg 2+ , confirming the successful uptake of Hg 2+ .…”

Section: Resultsmentioning

confidence: 98%

“…Upon the adsorption of Hg 2+ , the characteristic peak at 756 cm −1 �which corresponded to the N−H wagging band�weakened markedly, which was attributed to the coordination of N in UiO-66-NH 2 and Hg 2+ (Figure 5A). 6,13,37 Additionally, the C−N stretching on the imidazole rings, corresponding to the peak at 1142 cm −1 , also weakened, which was because of the coordination of N in ZIF-8 and Hg 2+ . 16,38 The UiO-66-NH 2 @AuNCs/ZIF-8 X-ray photoelectron spectroscopy (XPS) data were also analyzed before and after the adsorption of Hg 2+ .…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Isolation of Sensing Units and Adsorption Groups Based on MOF-on-MOF Hierarchical Structure for Both Highly Sensitive Detection and Removal of Hg²⁺

Bi,

Liu,

Luo

et al. 2024

Inorg. Chem.

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Bifunctional materials have attracted ongoing interest in the field of detection and removal of contaminants because of their integration of two functions, but they exhibit commonly exceptional performance in only one of these two aspects. The interaction between the two functional units of the bifunctional materials may compromise their sensing and adsorption abilities. Guided by the concept of domain building blocks (DBBs), a hierarchical metal−organic framework (MOF)-on-MOF hybrid was designed by growing gold nanoclusters (AuNCs)-embedded zeolitic imidazolate framework 8 (AuNCs/ZIF-8) on the surface of Zr-MOF (UiO-66-NH 2 ) for the simultaneous detection and removal of Hg 2+ . In the hybrid, the amino groups (−NH 2 ) and AuNCs�which were the adsorption groups and sensing units, respectively, were isolated from each other. Specifically, the adsorption groups (−NH 2 ) were assembled in the inner UiO-66-NH 2 layer, while the sensing units (AuNCs) were confined in the outer ZIF-8 layer. This hierarchical structure not only spatially hindered the electron transfer between these two units but also triggered the aggregation-induced emission of AuNCs because of the confinement of ZIF-8 on the AuNCs, thus changing the fluorescence of AuNCs from quenching to enhancement. The newly prepared UiO-66-NH 2 @AuNCs/ZIF-8 hybrid, as expected, showed an ultralow detection limit (0.42 ppb) and a high adsorption capacity (129.9 mg•g −1 ) for Hg 2+ . Overall, this work provides a feasible approach to improve the integrated performance of MOF-based composites based on DBBs.

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Section: Resultsmentioning

confidence: 98%

Section: ■ Results and Discussionmentioning

confidence: 99%

Isolation of Sensing Units and Adsorption Groups Based on MOF-on-MOF Hierarchical Structure for Both Highly Sensitive Detection and Removal of Hg²⁺

Bi,

Liu,

Luo

et al. 2024

Inorg. Chem.

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show abstract

“…[29,48] Similarly, in the S 2p spectra of the COF-316-DM (Figure 4e), the two split peaks located at 163.45 eV and 161.85 eV was corresponding to the S 2p 1/2 and S 2p 3/2 , respectively. [49][50][51][52] After Pd(II) adsorption, the peak position of S 2p 1/2 and S 2p 3/2 shifted to 163.61 eV and 162.38 eV, indicating that there was an interaction between sulfur atoms and Pd(II). Additionally, the two characteristic peaks located at 168.94 eV and 167.52 eV was attributed to C=S groups.…”

Section: Investigation Of Adsorption Mechanismmentioning

confidence: 99%

An Aryl‐ether‐linked Covalent Organic Framework Modified with Thioamide Groups for Selective Extraction of Palladium from Strong Acid Solutions

Zhao,

Bai,

Zhou

et al. 2023

Chemistry A European J

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Efficient adsorption of palladium ions from acid nuclear waste solution is crucial for ensuring the safety of vitrification process for radioactive waste. However, the limited stability and selectivity of most current adsorbents hinder their practical applications under strong acid and intense radiation conditions. Herein, to address these limitations, we designed and synthesized an aryl‐ether‐linked covalent organic framework (COF‐316‐DM) grafted dimethylthiocarbamoyl groups on the pore walls. This unique structure endows COF‐316‐DM with high stability and exceptional palladium capture capacity. The robust polyarylether linkage enables COF‐316‐DM to withstand irradiation doses of 200 or 400 kGy of β/γ ray. Furthermore, COF‐316‐DM demonstrates fast adsorption kinetics, high adsorption capacity (147 mg g‐1), and excellent reusability in 4 M nitric acid. Moreover, COF‐316‐DM exhibits remarkable selectivity for palladium ions in the presence of 17 interference ions, simulating high level liquid waste scenario. The superior adsorption performance can be attributed to the strong binding affinity between the thioamide groups and Pd2+ ions, as confirmed by the comprehensive analysis of FT‐IR and XPS spectra. Our findings highlight the potential of COFs with robust linkers and tailored functional groups for efficient and selective capture of metal ions, even in harsh environmental conditions.

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Nanomaterials Derived from Metal–Organic Frameworks and Their Applications for Pollutants Removal

Qu,

Leng,

Wang

et al. 2024

Reviews Env.Contamination (formerly:Residue Reviews)

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Removal of Hg2+ in wastewater by grafting nitrogen/sulfur-containing molecule onto Uio-66-NH2: from synthesis to adsorption studies

Cited by 5 publications

References 66 publications

Isolation of Sensing Units and Adsorption Groups Based on MOF-on-MOF Hierarchical Structure for Both Highly Sensitive Detection and Removal of Hg²⁺

Isolation of Sensing Units and Adsorption Groups Based on MOF-on-MOF Hierarchical Structure for Both Highly Sensitive Detection and Removal of Hg²⁺

An Aryl‐ether‐linked Covalent Organic Framework Modified with Thioamide Groups for Selective Extraction of Palladium from Strong Acid Solutions

Nanomaterials Derived from Metal–Organic Frameworks and Their Applications for Pollutants Removal

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Removal of Hg2+ in wastewater by grafting nitrogen/sulfur-containing molecule onto Uio-66-NH2: from synthesis to adsorption studies

Cited by 5 publications

References 66 publications

Isolation of Sensing Units and Adsorption Groups Based on MOF-on-MOF Hierarchical Structure for Both Highly Sensitive Detection and Removal of Hg2+

Isolation of Sensing Units and Adsorption Groups Based on MOF-on-MOF Hierarchical Structure for Both Highly Sensitive Detection and Removal of Hg2+

An Aryl‐ether‐linked Covalent Organic Framework Modified with Thioamide Groups for Selective Extraction of Palladium from Strong Acid Solutions

Nanomaterials Derived from Metal–Organic Frameworks and Their Applications for Pollutants Removal

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Product

Resources

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Isolation of Sensing Units and Adsorption Groups Based on MOF-on-MOF Hierarchical Structure for Both Highly Sensitive Detection and Removal of Hg²⁺

Isolation of Sensing Units and Adsorption Groups Based on MOF-on-MOF Hierarchical Structure for Both Highly Sensitive Detection and Removal of Hg²⁺