PIM-based mixed-matrix membranes containing MOF-801/ionic liquid nanocomposites for enhanced CO2 separation performance

Chen, Wenbo; Zhang, Zhenguo; Yang, Cancan; Liu, Jing; Shen, Hongcheng; Yang, Kai; Wang, Zhe

doi:10.1016/j.memsci.2021.119581

Cited by 82 publications

(25 citation statements)

References 63 publications

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“…As a new type of porous nano-material, Metal organic framework (MOF) material is composed of metal ions or metal clusters as the center and is connected with an organic framework [12]. MOF has the advantages of a high specific surface area, adjustable pore size, etc., has attracted widespread attention and has been used in catalysis [13,14], adsorption [15,16], sensors [17,18], separation [19,20] and other fields. However, in practice, most MOFs are considered too fragile to be used.…”

Section: Introductionmentioning

confidence: 99%

Desalination Characteristics of Cellulose Acetate FO Membrane Incorporated with ZIF-8 Nanoparticles

Wang

Wang³

et al. 2022

Membranes

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Forward osmosis membranes have a wide range of applications in the field of water treatment. However, the application of seawater desalination is restricted, so the research of forward osmosis membranes for seawater desalination poses new challenges. In this study, zeolitic imidazolate framework-8 (ZIF-8) was synthesized by a mechanical stirring method, and its crystal structure, surface morphology, functional group characteristics, thermochemical stability, pore size distribution and specific surface area were analyzed. The cellulose acetate (CA)/ZIF-8 mixed matrix forward osmosis membrane was prepared by using the synthesized ZIF-8 as a modified additive. The effects of the additive ZIF-8 content, coagulation bath temperature, mixing temperature and heat treatment temperature on the properties of the CA/ZIF-8 forward osmosis membrane were systematically studied, and the causes were analyzed to determine the best membrane preparation parameters. The structure of the CA membrane and CA/ZIF-8 mixed matrix forward osmosis membranes prepared under the optimal conditions were characterized by Fourier Transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), contact angle and Atomic force microscope (AFM). Finally, the properties of the HTI membrane (Membrane manufactured by Hydration Technology Innovations Inc.), CA forward osmosis membrane and CA/ZIF-8 mixed matrix forward osmosis membrane were compared under laboratory conditions. For the CA membrane, the water flux and reverse salt flux reached 48.85 L·m−2·h−1 and 3.4 g·m−2·h−1, respectively. The reverse salt flux and water flux of the CA/ZIF-8 membrane are 2.84 g·m−2·h−1 and 50.14 L·m−2·h−1, respectively. ZIF-8 has a promising application in seawater desalination.

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Section: Introductionmentioning

confidence: 99%

Desalination Characteristics of Cellulose Acetate FO Membrane Incorporated with ZIF-8 Nanoparticles

Wang

Wang³

et al. 2022

Membranes

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“…Adsorption and photocatalysis [4][5][6] have been used to remove Cr(VI) from wastewater due to their sustainability, high efficiency, and reasonable cost. Metal-organic frameworks (MOFs) have been widely used as adsorbents to remove pollutants from water due to their high surface area, large pore size, tunability, and suitable nanoscale cavities [7]. For example, silver-triazolate MOFs could adsorb Cr(VI) via anion exchange reaction with a maximal adsorption capacity of 37.0 mg/g at 303 K [8].…”

Section: Introductionmentioning

confidence: 99%

Efficient Removal of Cr(VI) by TiO2 Based Micro-Nano Reactor via the Synergy of Adsorption and Photocatalysis

Liu

et al. 2022

Nanomaterials

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The low-toxicity treatment of chromium-containing wastewater represents an important way of addressing key environmental problems. In this study, a core-shell structural ZIF-8@TiO2 photocatalyst was synthesized by a simple one-step hydrothermal method. The obtained composite photocatalyst possessed improved photocatalytic activity compared with TiO2. The results indicated that the optimized ZIF-8@TiO2 composite exhibited the highest removal efficiency with 93.1% of Cr(VI) after 120 min under UV-vis irradiation. The removal curves and XPS results indicated that the adsorbed Cr(VI) on the ZIF-8 during the dark process was preferentially reduced. The superior removal efficiency of ZIF-8@TiO2 is attributed to the combination of both high adsorption of ZIF-8, which attracted Cr(VI) on the composite surface, and the high separation efficiency of photo-induced electron-hole pairs. For the mixture of wastewater that contained methyl orange and Cr(VI), 97.1% of MO and 99.7% of Cr(VI) were removed after 5 min and 60 min light irradiation, respectively. The high removal efficiency of multiple pollutants provides promising applications in the field of Cr(VI) contaminated industrial wastewater treatment.

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“…To address this issue, the introduction of additives, such as graphene , and porous organic fillers, has been developed, offering great promise in impeding the aging of PIM-1 with maintained gas permeability . Recently, metal–organic framework (MOF)-based mixed matrix membranes (MMMs) have been studied for gas separation. − In view of PIM-1 and MOF-based MMMs, the in situ crossing-interface linking route was proposed to bond UiO-66-NH 2 nanoparticles to the growing PIM-1 chains, where the introduced MOFs greatly restrict the free movement of PIM-1 chains in the long run . Although the resulting MMMs demonstrated considerably controlled aging, different kinds of monomers needed to be specifically synthesized, thus complexing the synthetic procedures.…”

Section: Introductionmentioning

confidence: 99%

Mitigated Aging in a Defective Metal–Organic Framework Pillared Polymer of an Intrinsic Porosity Hybrid Membrane for Efficient Gas Separation

Geng

Sun

Zhang

et al. 2022

ACS Sustainable Chem. Eng.

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Although polymers of intrinsic microporosity (PIMs) have been recognized as highly permeable membrane materials in gas separation, the physical aging phenomenon seriously affected their performance due to the collapse of micropores. In this work, we report an alternative approach to alleviate the physical aging of PIM-based membranes, as demonstrated by pillaring the PIM-1 membrane with defect-engineered metal–organic framework (MOF) nanoparticles. With excellent interfacial compatibility between the defective UiO-66-FA and PIM-1 by the formation of hydrogen-bond networks, the incorporated MOF nanoparticles acted as pillars of the resulting mixed matrix membranes (UiO-66-FA/PIM-1 MMM) to prevent the collapse of the micropores of the PIM-1 membrane and hence reduce its aging. Concurrently, defective MOFs in the polymer matrix endow the resulting MMMs with fast diffusion pathways and facilitate CO2 transport. Compared with the pristine PIM-1 membrane, UiO-66-FA/PIM-1 MMM displayed maintained CO2/N2 selectivity of about 23.1 but a sharp increased CO2 permeability from 3980 to 16,591 barrer. Only a 25% reduction in CO2 permeability was observed for the UiO-66-FA/PIM-1 MMM after 160 days of operation under the mixed-gas CO2/N2 separation conditions, which is less than the equivalent losses of 40 and 76% for the counterpart MOF-based hybrid membrane and PIM-1, respectively. Given that the performances of the resulting membranes far surpass the 2008 Robeson upper bound, this study may provide a feasible way for sustainable development of PIM-based MMMs in gas separation application.

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PIM-based mixed-matrix membranes containing MOF-801/ionic liquid nanocomposites for enhanced CO2 separation performance

Cited by 82 publications

References 63 publications

Desalination Characteristics of Cellulose Acetate FO Membrane Incorporated with ZIF-8 Nanoparticles

Desalination Characteristics of Cellulose Acetate FO Membrane Incorporated with ZIF-8 Nanoparticles

Efficient Removal of Cr(VI) by TiO2 Based Micro-Nano Reactor via the Synergy of Adsorption and Photocatalysis

Mitigated Aging in a Defective Metal–Organic Framework Pillared Polymer of an Intrinsic Porosity Hybrid Membrane for Efficient Gas Separation

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