Effect of modification of UiO-66 for CO2 adsorption and separation of CO2/CH4

Mutyala, Suresh; Jonnalagadda, Madhavi; Ibrahim, Sobhy M.

doi:10.1016/j.molstruc.2020.129506

Cited by 33 publications

(14 citation statements)

References 39 publications

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“…The trend in the CO 2 adsorption performance of the as-prepared samples is consistent with the order of BET specific surface areas (Figure S4). The photocatalytic stability of a catalyst can be determined by multiple photocatalytic cycles Figure.…”

Section: Resultsmentioning

confidence: 99%

Controllable Synthesis of MIL-101(Cr)@TiO₂ Core–Shell Nanocomposites for Enhanced Photocatalytic Activity

Liu

Lai

et al. 2023

ACS Appl. Nano Mater.

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Incorporating high surface area and high CO 2 adsorption capacity of metal−organic frameworks (MOFs) together with highly efficient semiconductor photocatalysts provides an ideal strategy for designing CO 2 reduction photocatalysts. Controllable growth of TiO 2 nanoparticles on MIL-101(Cr) can be obtained and yields MIL-101(Cr)@TiO 2 core− shell photocatalysts via a fluoride-assisted solvothermal method. Corrosion occurs on the surface of MIL-101(Cr) by the action of F − and generates an activated surface, facilitating the growth of a TiO 2 shell. MIL-101(Cr)@TiO 2 nanocomposites with different TiO 2 contents are remarkably fabricated by controlling the reaction conditions. The morphology, structure, surface area, and composition of the as-prepared MIL-101(Cr)@TiO 2 nanocomposites are investigated by various characterization methods. The EDS mapping images reveal that the Ti and O elements are uniformly distributed on the shell, but Cr and C elements are mainly situated at the core of the composite, which further indicates the successful synthesis of the MIL-101(Cr)@TiO 2 core−shell structure. The photocatalytic conversion of CO 2 into CH 4 is noticeably enhanced by the produced MIL-101(Cr)@TiO 2 octahedra inheriting both large surface area (387.3 m 2 g −1 ) and high CO 2 adsorption capacity. Compared to pure TiO 2 nanoparticles under the same conditions, the optimized MIL-101(Cr)@TiO 2 photocatalyst exhibits a much greater CO 2 conversion efficiency, with a CH 4 generation rate of 0.22 μmol h −1 g −1 . This work will advance the experimental and theoretical basis for exploring highly efficient CO 2 reduction photocatalysts.

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Section: Resultsmentioning

confidence: 99%

Controllable Synthesis of MIL-101(Cr)@TiO₂ Core–Shell Nanocomposites for Enhanced Photocatalytic Activity

Liu

Lai

et al. 2023

ACS Appl. Nano Mater.

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“…It can be seen from the scanning electron microscopy (SEM) images of UiO-66 and its derivatives that different kinds of UiO-66 nanoparticles demonstrate similar spherical crystal structures (Figure ). − More importantly, all types of UiO-66 nanoparticles have a certain degree of agglomeration, , but the nanoparticle grafted with SPA (UiO-66-SPA) demonstrates less tendency to aggregate with smaller nanoparticles (Figure d). Notably, although SPA chains have been grafted onto the UiO-66 particles, the particle size of UiO-66-SPA is only about one-third of that of UiO-66.…”

Section: Resultsmentioning

confidence: 99%

Ultrafast Poly(sodium methacrylate)-Grafted UiO-66-Incorporated Nanocomposite Membranes Enable Excellent Active Pharmaceutical Ingredient Concentration

Huang

Cheng

Bai

et al. 2021

Ind. Eng. Chem. Res.

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Membrane separation technology is an energy-efficient and green separation technology for purifying and concentrating active pharmaceutical ingredients (APIs) from organic solvents during the synthesis process. However, the lack of highly permeable materials with high rejection performance toward target molecules impedes the worldwide application of the membrane separation technology to reduce the cost of the separation process on a large scale. In the current study, we develop highly permeable thin-film nanocomposite (TFN) membranes through incorporating poly(sodium methacrylate) (SPA)-grafted UiO-66 into the polypyrrole selective layer, clarifying the effects of preparation conditions on the performance of the TFN membranes and optimizing the operation conditions on the separation performance of the TFN membranes. With finely tailored membrane structure and affinity between the TFN membranes and the solvents, the optimized TFN membranes demonstrate solution permeance as high as 88.8 L m −2 h −1 bar −1 with a rejection of about 99.9% toward octreotide acetate, exhibiting excellent rejection performance toward polypeptides and antibiotics. In the continuous operation mode, the TFN membranes still demonstrate stable permeance as high as 56.5 L m −2 h −1 bar −1 , which is about 1 order of magnitude higher than that of commercial polyamide membranes, showing strong potential in purifying and concentrating APIs from organic solvents.

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“…In view of the high density metal exposure sites in the NUC-31 tubular nanochannel, which makes it potentially adsorbed to quadrupole moment target molecules, we tested the CO 2 adsorption performance of NUC-31 at 273 and 298 K. The results show that the maximum adsorption capacity of CO 2 at 273 and 298 K was 95.12 and 67.35 cm 3 ·g –1 (Figure ), respectively, which were higher than those of NUC-5 , MOF-5 , UiO-66 , NUC-30 , and so on recorded in the literature. At the same time, there is a moderate lag loop in the incomplete adsorption–desorption isotherm of CO 2 , indicating that there is a strong interaction between NUC-31 and the host and guest of CO 2 .…”

Section: Studies Of Gas Adsorptionmentioning

confidence: 97%

“…NUC-31 should be activated before porosity testing; first, it was successively immersed in methanol for 3 days and then in dichloromethane for 3 days, during which the solvent was renewed every 12 h. Finally, a vacuum oven was used for the final drying at a temperature of 120 °C for 24 h. − The N 2 adsorption experiments at 77 K showed that the total pore volume of activated NUC-31 was 0.59 cm 3 ·g –1 , and the specific surface area calculated by the Brunauer–Emmett–Teller (BET) method was 1590 m 2 ·g –1 . The adsorption–desorption isotherms of N 2 exhibited a typical type-I adsorption configuration with the pore size distribution ranging from 0.8 to 1.6 nm (Figure S8).…”

Section: Studies Of Gas Adsorptionmentioning

confidence: 99%

Nanochannel-Based Heterometallic {Co^IITb^III}-Organic Framework for Fluorescence Recognition of Tryptophan and Catalytic Cycloaddition of Epoxides with CO₂

Zhang

Chen

Wang

et al. 2022

ACS Appl. Nano Mater.

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To pave the way for the salient application of metal–organic frameworks (MOFs) as realistic sensors, it is critical to screen or design the customized functional structure with specified prominent synergistic effects provided by its constituents, voids, specific surfaces, functional sites, etc. This prompts us to study the sensing performance of a honeycomb nanochannel of heterometallic MOFs previously invented. This structure has excellent physical and chemical properties of high specific surface area, good chemical stability, and highly open coexistence of Lewis acid–base sites. In this work, the highly robust sky-blue [CoTb(CO2)6(OH2)]-based heterometallic framework of {[(CH3)2NH2][CoTb(TDP)(H2O)]·3H2O·4DMF} n (NUC-31; H6TDP = 2,4,6-tri(2′,4′-dicarboxyphenyl)pyridine) was synthesized. The results of the fluorescence recognition experiment show that, compared with other amino acids, NUC-31 has an ultrastrong fluorescence quenching for tryptophan with a detection limit as low as 0.11 mM, which means that NUC-31 can be used as a potential fluorescence probe for the targeted detection of tryptophan of ecosystems. In addition, the catalytic experiment results indicated that NUC-31 has high activity for catalyzing the cycloaddition reaction of epoxides with CO2 under 75 °C and 1 atm. It is precisely due to NUC-31 having extremely unsaturated tetracoordinated Co(II) and hepta-coordinated Tb(III) metal ions as well as a high pore volume (65.1%), which makes the catalytic reaction conditions relatively mild. Therefore, this work certificated that nanoporous MOFs assembled from a multifunctional ligand with the highly open coexistent Lewis acid–base sites had a potential application not only in monitoring tryptophan in clinical scenarios but also as an effective heterogeneous catalyst.

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Effect of modification of UiO-66 for CO2 adsorption and separation of CO2/CH4

Cited by 33 publications

References 39 publications

Controllable Synthesis of MIL-101(Cr)@TiO₂ Core–Shell Nanocomposites for Enhanced Photocatalytic Activity

Controllable Synthesis of MIL-101(Cr)@TiO₂ Core–Shell Nanocomposites for Enhanced Photocatalytic Activity

Ultrafast Poly(sodium methacrylate)-Grafted UiO-66-Incorporated Nanocomposite Membranes Enable Excellent Active Pharmaceutical Ingredient Concentration

Nanochannel-Based Heterometallic {Co^IITb^III}-Organic Framework for Fluorescence Recognition of Tryptophan and Catalytic Cycloaddition of Epoxides with CO₂

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Effect of modification of UiO-66 for CO2 adsorption and separation of CO2/CH4

Cited by 33 publications

References 39 publications

Controllable Synthesis of MIL-101(Cr)@TiO2 Core–Shell Nanocomposites for Enhanced Photocatalytic Activity

Controllable Synthesis of MIL-101(Cr)@TiO2 Core–Shell Nanocomposites for Enhanced Photocatalytic Activity

Ultrafast Poly(sodium methacrylate)-Grafted UiO-66-Incorporated Nanocomposite Membranes Enable Excellent Active Pharmaceutical Ingredient Concentration

Nanochannel-Based Heterometallic {CoIITbIII}-Organic Framework for Fluorescence Recognition of Tryptophan and Catalytic Cycloaddition of Epoxides with CO2

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Controllable Synthesis of MIL-101(Cr)@TiO₂ Core–Shell Nanocomposites for Enhanced Photocatalytic Activity

Controllable Synthesis of MIL-101(Cr)@TiO₂ Core–Shell Nanocomposites for Enhanced Photocatalytic Activity

Nanochannel-Based Heterometallic {Co^IITb^III}-Organic Framework for Fluorescence Recognition of Tryptophan and Catalytic Cycloaddition of Epoxides with CO₂