Nanosheets of MIL-53(Al) applied in membranes with improved CO2/N2and CO2/CH4selectivities

Perea-Cachero, Adelaida; Sánchez‐Laínez, Javier; Zornoza, Beatriz; Romero-Pascual, E.; Téllez, Carlos; Coronas, Joaquı́n

doi:10.1039/c8dt03774d

Cited by 24 publications

(9 citation statements)

References 56 publications

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“…Currently, approximate 86% of global energy consumption is based on fossil fuels, coal, oil, and natural gas. 146 The partial pressure of CO 2 in flue gas is 0.01−0.02 MPa, with a large amount of N 2 . 147 Therefore, it is meaningful to selectively capture CO 2 from N 2 .…”

Section: ■ Co 2 Separationmentioning

confidence: 99%

Porous Metal–Organic Frameworks for Carbon Dioxide Adsorption and Separation at Low Pressure

Liu

et al. 2020

ACS Sustainable Chem. Eng.

107

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The rapidly increasing concentration of CO2 in the atmosphere has resulted in a serious greenhouse effect. CO2 capture and storage (CSS) technology is widely accepted as an effective method for reduction of CO2 emissions. Metal–organic frameworks show an excellent potential for CO2 capture in CCS due to various advantages of high porosity, high surface area, adjustable pore structure, and multifunctionality. A series of works have been devoted to design of MOFs for CO2 capture and separation. Considering the low CO2 partial pressure in the practical industry, improving CO2 adsorption and separation performance at low pressure (including atmospheric pressure) is more meaningful. Establishing the structure–property relationships between MOFs and guest CO2 molecules is helpful for the design of MOFs as CO2 adsorbents. Therefore, we comprehensively review the factors which affect the CO2 capture performance on MOFs at low pressure, including pore structure, open metal sites, Lewis basic groups, and other polar groups. We further indicate the regulation of increasing CO2 uptake on modified MOFs through adsorption mechanisms based on clarified structures of MOFs. In addition, we discuss the strategies to improve separation performance of CO2 from flue gases, biogases, and crude C2H2 based on enhancement of CO2 uptake or sieving via porosity.

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Section: ■ Co 2 Separationmentioning

confidence: 99%

Porous Metal–Organic Frameworks for Carbon Dioxide Adsorption and Separation at Low Pressure

Liu

et al. 2020

ACS Sustainable Chem. Eng.

107

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“…Finally, it seems logic that particles of nanoporous materials with a high aspect ratio, e.g., nanosheets, should be available with proper stability to create ultrathin membranes claimed in this review, particularly as mixed matrix membranes. In the particular case of MOFs (but this applies to all the materials described here), these nanosheets can be prepared by either exfoliation top-down approach 95,96 or direct synthesis bottom-up approach. 153,154 In any event, nanoporous nanosheets will most likely be the building blocks in creating a new generation of ultimate gas selective membranes.…”

Section: Concluding Remarks and Future Trendsmentioning

confidence: 99%

“…This technique of ltration can also be applied to suspensions of nanosheets of zeolites 94 and MOFs 95,96 obtained upon exfoliation of the corresponding crystals. In particular, the results achieved by Peng et al 95 are outstanding, with H 2 /CO 2 separation selectivity of 291 at 120 C together with the H 2 permeance of 3760 GPU.…”

Section: Facile Vacuum Ltrationmentioning

confidence: 99%

Ultrathin permselective membranes: the latent way for efficient gas separation

2020

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“…MILs‐ n (Materials Institut Lavoisier) materials, considered as sub‐family of MOFs, are normally composed of trivalent metal cations (Al 3+ , Cr 3+ , V 3+/4+ , Fe 3+ , Sc 3+ , In 3+ ) and carboxylate‐type ligands, and could generate highly porous and moisture stable frameworks . MIL‐53(Al) and MIL‐68(In) are two of the well‐studied MIL type materials due to their high thermal stability and great flexibility . For example, heterostructures of multi‐metal sulfides and sulfide/oxide were prepared by Yang et al .…”

Section: Synthesis Of Hollow Structured Metal Sulfidesmentioning

confidence: 99%

Hollow Structured Metal Sulfides for Photocatalytic Hydrogen Generation

et al. 2020

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Metal sulfides (MSs) are a promising class of materials for photocatalytic hydrogen generation due to their distinct features of photosensitivity, electrical conductance, and photoelectrochemical stability. However, the photocatalytic activity of solid structured MSs is often compromised due to low incident photon absorption, high charge carrier recombination, inadequate catalytic active sites, and slow mass and charge diffusion. The development of hollow structured MSs alleviates these limitations and achieves higher H2 generation than solid structured counterparts. This minireview aims to review the recent advances in the development of synthetic methods for various hollow structured MSs that are designed to enhance light absorption and fasten mass diffusion. Particularly, this report highlights the advent of sophisticated heterostructured hollow MSs for the application in photocatalysis, in which the formation of heterojunction at the semiconductor interface ensures spatial separation of charge carriers. The synergy between the hollow structure and heterostructure dramatically increases the H2 generation rate by providing increased light absorption, delayed charge recombination, and accelerated mass diffusion. We also point to potentially fruitful research directions in this field, in hope that this minireview serves as a stepping stone for the future development in hollow MSs for photocatalytic applications and beyond.

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Nanosheets of MIL-53(Al) applied in membranes with improved CO₂/N₂and CO₂/CH₄selectivities

Abstract: Nanosheets obtained from MOF MIL-53(Al) applied in mixed matrix membranes with improved CO2/N2 and CO2/CH4 selectivities.

Cited by 24 publications

References 56 publications

Porous Metal–Organic Frameworks for Carbon Dioxide Adsorption and Separation at Low Pressure

Porous Metal–Organic Frameworks for Carbon Dioxide Adsorption and Separation at Low Pressure

Ultrathin permselective membranes: the latent way for efficient gas separation

Hollow Structured Metal Sulfides for Photocatalytic Hydrogen Generation

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