Preparation of a GO/MIL-101(Fe) Composite for the Removal of Methyl Orange from Aqueous Solution

Liu, Zhuannian; He, Wenwen; Zhang, Qingyun; Shapour, Habiba; Bakhtari, Mohammad Fahim

doi:10.1021/acsomega.0c05091

Cited by 112 publications

(67 citation statements)

References 45 publications

(53 reference statements)

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“…PXRD can be used to accurately and efficiently detect the crystallinity of samples, and the structural characteristics of the samples can be determined by comparing the PXRD patterns of products ( Figure 2 ) [ 41 , 42 , 43 ]. Here, the synthesized products were investigated with PXRD by varying the addition ratio of FeCl 3 ∙6H 2 O and silver nitrate.…”

Section: Resultsmentioning

confidence: 99%

MIL-101 (Fe) @Ag Rapid Synergistic Antimicrobial and Biosafety Evaluation of Nanomaterials

Zheng

Chen

et al. 2022

Molecules

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Metal-organic frameworks (MOFs), which have become popular in recent years as excellent carriers of drugs and biomimetic materials, have provided new research ideas for fighting pathogenic bacterial infections. Although various antimicrobial metal ions can be added to MOFs with physical methods, such as impregnation, to inhibit bacterial multiplication, this is inefficient and has many problems, such as an uneven distribution of antimicrobial ions in the MOF and the need for the simultaneous addition of large doses of metal ions. Here, we report on the use of MIL-101(Fe)@Ag with efficient metal-ion release and strong antimicrobial efficiency for co-sterilization. Fe-based MIL-101(Fe) was synthesized, and then Ag+ was uniformly introduced into the MOF by the substitution of Ag+ for Fe3+. Scanning electron microscopy, powder X-ray diffraction (PXRD) Fourier transform infrared spectroscopy, and thermogravimetric analysis were used to investigate the synthesized MIL-101(Fe)@Ag. The characteristic peaks of MIL-101(Fe) and silver ions could be clearly seen in the PXRD pattern. Comparing the diffraction peaks of the simulated PXRD patterns clearly showed that MIL-101(Fe) was successfully constructed and silver ions were successfully loaded into MIL-101(Fe) to synthesize an MOF with a bimetallic structure, that is, the target product MIL-101(Fe)@Ag. The antibacterial mechanism of the MOF material was also investigated. MIL-101(Fe)@Ag exhibited low cytotoxicity, so it has potential applications in the biological field. Overall, MIL-101(Fe)@Ag is an easily fabricated structurally engineered nanocomposite with broad-spectrum bactericidal activity.

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Section: Resultsmentioning

confidence: 99%

MIL-101 (Fe) @Ag Rapid Synergistic Antimicrobial and Biosafety Evaluation of Nanomaterials

Zheng

Chen

et al. 2022

Molecules

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“…These changes may attribute to that the introduction of TiO 2 limiting the formation of MIL-101(Fe). In addition, blow the 1200 cm −1 , 744 and 545 cm −1 assigned to C-H and Fe-O respectively [41], are diminished in the nanocomposites compared with MIL-101(Fe). We speculate that a strong interaction between the TiO 2 and MIL-101(Fe) exists and an alteration of the organic moiety ligation to the metal cluster takes place [42].…”

Section: Characterization Of Catalystsmentioning

confidence: 89%

“…For the O 1s spectra of MIL-101(Fe)/TiO2, a lattice O in TiO2 (O-Ti) still exists with a binding energy of 530.1 eV (Figure 3b). Two splitting peaks at around 531.3 and 532.2 eV were also obtained after deconvolution of O 1s spectrum of MIL-101(Fe)/TiO2 (Figure 3b), which were assigned to the oxygen components of the terephthalate linkers and Fe-O bonds of MIL-101(Fe), respectively [41]. The spectra of Fe 2p of TiO2/MIL-101(Fe) showed two main peaks at 711.5 and 725.4 eV (Figure 3c), which are the characteristic of Fe 2p3/2 and Fe 2p1/2 in MIL-101 (Fe), respectively [30].…”

Section: Characterization Of Catalystsmentioning

confidence: 92%

TiO2@MOF Photocatalyst for the Synergetic Oxidation of Microcystin-LR and Reduction of Cr(VI) in Aqueous Media

Wang

Geng

et al. 2021

Catalysts

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The coexistence of pollutants presents a great challenge to the implementation of photocatalysts. In this work, a novel MIL-101(Fe)/TiO2 composite prepared by in situ growth of MIL-101(Fe) on TiO2 was developed for the synergetic oxidation of MC-LR and Cr(VI) reduction. The heterojunction material shows elevated photocatalytic behavior under ultraviolet compared with the unary pollutant system. Furthermore, quenching experiments and electron spin resonance confirm that the enhanced photodegradation behavior is related to the synergistic effect between the photocatalytic reduction and oxidation process, in which MC-LR consumes the holes and Cr(VI) captures electrons, followed by efficient charge separation through the conventional double-transfer mechanism between MIL-101(Fe) and TiO2. This investigation provides a deeper understanding of the construction of MOFs/semiconductor heterojunctions for the pollutants removal in multi-component contaminants system.

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“…For T-MIL-88B (Figure 4.a), Fe 2p 3/2 XPS spectrum exhibited three peaks, including a peak at 706.9 eV corresponding to metallic iron 27 A thermogravimetric analysis of Fe/MIL-101 and MIL-88B has been represented in Figure 5. For Fe/MIL-101, the weight loss in the range of 50-250°C is because of the evaporation of water and removal of free terephthalates inside the pore of MOF 34 . Thereafter, the main weight loss in the temperature range of 270 to 670°C is due to the degradation of organic ligand in the framework of MOF which is attributed to the collapse of the framework 34 .…”

Section: Catalyst Recycling Studymentioning

confidence: 99%

“…For Fe/MIL-101, the weight loss in the range of 50-250°C is because of the evaporation of water and removal of free terephthalates inside the pore of MOF 34 . Thereafter, the main weight loss in the temperature range of 270 to 670°C is due to the degradation of organic ligand in the framework of MOF which is attributed to the collapse of the framework 34 . The weight loss of MIL-88B before 250°C corresponds to the removal of water and excess DMF from the framework 35 .…”

Section: Catalyst Recycling Studymentioning

confidence: 99%

Aqueous phase conversion of CO2 into acetic acid over thermally transformed MIL-88B

Ahmad

Koley

Dwivedi

et al. 2021

Preprint

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Sustainable production of acetic acid (AA) is a high priority due to its high global manufacturing capacity and numerous applications. Currently it is predominantly synthesized via carbonylation of methanol, in which both the reactants are fossil-derived. CO2 transformation into AA is highly desirable to achieve net zero carbon emissions, but significant challenges remain to achieve this efficiently. Herein, we report a heterogeneous catalyst, thermally transformed MIL-88B with Fe0 and Fe3O4 dual active sites, for highly selective AA formation via methanol hydrocarboxylation. This efficient catalyst showed high AA yield (590.1 mmol/gcat.L) with 81.7% selectivity at 150°C in aqueous phase using LiI as a co-catalyst. The reaction is believed to proceed via formic acid intermediate. No significant difference in AA yield and selectivity was noticed during catalyst recycling study up to five cycles. This work scalable and industrially relevant for CO2 utilisation to reduce carbon emissions, especially if green methanol and green hydrogen are used.

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Preparation of a GO/MIL-101(Fe) Composite for the Removal of Methyl Orange from Aqueous Solution

Cited by 112 publications

References 45 publications

MIL-101 (Fe) @Ag Rapid Synergistic Antimicrobial and Biosafety Evaluation of Nanomaterials

MIL-101 (Fe) @Ag Rapid Synergistic Antimicrobial and Biosafety Evaluation of Nanomaterials

TiO2@MOF Photocatalyst for the Synergetic Oxidation of Microcystin-LR and Reduction of Cr(VI) in Aqueous Media

Aqueous phase conversion of CO2 into acetic acid over thermally transformed MIL-88B

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