Synthesis of mesoporous-structured MIL-68(Al)/MCM-41-NH2 for methyl orange adsorption: Optimization and Selectivity

Hua, Tao; Li, Dongmei; Li, Xiaoman; Lin, Jialiang; Niu, Ji-Liang; Cheng, Jianhua; Zhou, Xiao‐Nong; Hu, Yongyou

doi:10.1016/j.envres.2022.114433

Cited by 10 publications

(7 citation statements)

References 79 publications

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“…As shown in Figure 6(b) , the C 1 s spectrum of MIL-53 (Fe, Cu) corresponds to the C-C, C-N, and O-C=O bonds at 284.54 eV, 284.80 eV, and 288.59 eV, respectively [ 39 , 40 ]. After the adsorption of methyl orange, the peaks of C–C and O-C=O shift to 284.54 eV and 288.54 eV, respectively, which is possibly due to the electronic interaction between the elements in the adsorption process [ 41 ].…”

Section: Resultsmentioning

confidence: 99%

“…The O 1 s spectrum is decomposed into three peaks, located at 529.83 eV, 531.56 eV, and 533.18 eV, corresponding to C=O, C-O, and Fe-O bonds, respectively [ 17 , 45 ]. During methyl orange adsorption, the C=O, C-O, and Fe-O peaks all shifted toward higher binding energies, indicating a decrease in the outer electron density of oxygen in the organic ligand [ 39 ]. Moreover, the area of C=O and Fe-O binding peaks changed significantly after methyl orange adsorption, indicating that C=O and Fe-O functional groups are involved in the adsorption process.…”

Section: Resultsmentioning

confidence: 99%

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Characterization of an Iron-Copper Bimetallic Metal-Organic Framework for Adsorption of Methyl Orange in Aqueous Solution

Yang,

Wang,

Zhou

et al. 2023

Journal of Analytical Methods in Chemistry

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Iron-based organic frame material MIL-53 (Fe) was synthesized by the hydrothermal method with Cu2+ incorporated to obtain bimetallic composite MIL-53 (Fe, Cu). The structure and morphology of the material were characterized by SEM, XRD, BET, FTIR, XPS, and zeta potential. The adsorption performance of MIL-53 (Fe, Cu) on methyl orange was tested under a variety of conditions, including the effects of pH and material dosage, by the static adsorption test. The results show that under the condition of pH = 7, a temperature of 30°C, and an adsorbent dosage of 20 mg, the removal rate of MIL-53 (Fe, Cu) for methyl orange can reach more than 96% within 4 h, and the maximum adsorption capacity after fitting by the thermodynamic model can reach 294.43 mg/g, showing the excellent adsorption performance of MIL-53 (Fe, Cu) on methyl orange. In addition, by exploring the adsorption mechanism of MIL-53 (Fe, Cu) on methyl orange, it is found that the adsorption of MIL-53 (Fe, Cu) on methyl orange depends on chemical adsorption, as evidenced by combining Fe3+ and Cu2+ in the material with methyl orange molecules to form complexes to achieve adsorption. While the specific surface area of the material had no obvious effect on adsorption, the effects of pH, temperature, and concentration were explored. At a pH of 6.5, greater adsorption occurred at higher temperatures, as determined by thermodynamic model fitting, as well as with higher initial methyl orange molecule concentration.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Characterization of an Iron-Copper Bimetallic Metal-Organic Framework for Adsorption of Methyl Orange in Aqueous Solution

Yang,

Wang,

Zhou

et al. 2023

Journal of Analytical Methods in Chemistry

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“…As a result, PMS-HP adsorbs LDL-C through the electrostatic interaction, which is similar to PMS [ 43 , 44 ]. In addition, it was found that N–H and O–H played an important role in PMS adsorbing substances during the process [ 45 ]. Similar to our findings, N–H and O–H played an important role during the process on the basis of the result of XPS.…”

Section: Discussionmentioning

confidence: 99%

“…In addition, the O–H groups in PMS-HP could serve as hydrogen bond acceptors and interact electro-statically with hydrogen atoms or other positively charged regions in LDL-C. Furthermore, zeta potential measurements were conducted, revealing that following the adsorption of LDL-C by PMS-HP, the negative zeta potential decreased [ 45 ].…”

Section: Discussionmentioning

confidence: 99%

Functionalized Periodic Mesoporous Silica Nanoparticles for Inhibiting the Progression of Atherosclerosis by Targeting Low-Density Lipoprotein Cholesterol

Jin,

Lu,

Zhang

et al. 2024

Pharmaceutics

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Atherosclerotic disease is a substantial global burden, and existing treatments, such as statins, are recommended to lower low-density lipoprotein cholesterol (LDL-C) levels and inhibit the progression of atherosclerosis. However, side effects, including gastrointestinal unease, potential harm to the liver, and discomfort in the muscles, might be observed. In this study, we propose a novel method using periodic mesoporous silica nanoparticles (PMS) to create heparin-modified PMS (PMS-HP) with excellent biocompatibility, enabling selective removal of LDL-C from the blood. In vitro, through the introduction of PMS-HP into the plasma of mice, we observed that, compared to PMS alone, PMS-HP could selectively adsorb LDL-C while avoiding interference with valuable components such as plasma proteins and high-density lipoprotein cholesterol (HDL-C). Notably, further investigations revealed that the adsorption of LDL-C by PMS-HP could be well-fitted to quasi-first-order (R2 = 0.993) and quasi-second-order adsorption models (R2 = 0.998). Likewise, in vivo, intravenous injection of PMS-HP enabled targeted LDL-C adsorption (6.5 ± 0.73 vs. 8.6 ± 0.76 mM, p < 0.001) without affecting other plasma constituents, contributing to reducing intravascular plaque formation (3.66% ± 1.06% vs. 1.87% ± 0.79%, p < 0.05) on the aortic wall and inhibiting vascular remodeling (27.2% ± 6.55% vs. 38.3% ± 1.99%, p < 0.05). Compared to existing lipid adsorption techniques, PMS-HP exhibited superior biocompatibility and recyclability, rendering it valuable for both in vivo and in vitro applications.

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“… 31 Similar studies also acknowledged the importance of N–H and O–H in PMS adsorption. 32 Cholesterol molecules, being weakly polar, can enhance their interaction with PMS, making PMS more prone to adsorb cholesterol. This was consistent with our research findings, which demonstrated that PMS exhibited high adsorption capacity for weakly polar molecules such as CHO.…”

Section: Discussionmentioning

confidence: 99%

New application of a periodic mesoporous nanocrystal silicon–silica composite for hyperlipidemia

et al. 2023

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Synthesis of mesoporous-structured MIL-68(Al)/MCM-41-NH2 for methyl orange adsorption: Optimization and Selectivity

Cited by 10 publications

References 79 publications

Characterization of an Iron-Copper Bimetallic Metal-Organic Framework for Adsorption of Methyl Orange in Aqueous Solution

Characterization of an Iron-Copper Bimetallic Metal-Organic Framework for Adsorption of Methyl Orange in Aqueous Solution

Functionalized Periodic Mesoporous Silica Nanoparticles for Inhibiting the Progression of Atherosclerosis by Targeting Low-Density Lipoprotein Cholesterol

New application of a periodic mesoporous nanocrystal silicon–silica composite for hyperlipidemia

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