Hierarchical metal-organic framework (MOF) pore engineering

Yin, Xinyang; Alsuwaidi, Ahmad; Zhang, Xueyi

doi:10.1016/j.micromeso.2021.111633

Cited by 34 publications

(17 citation statements)

References 206 publications

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“…Consequently, the full potential of MOFs (e.g., high surface area, high active site density, high porosity) cannot be effectively utilized under most operating conditions. At the same time, this diffusion resistance hinders the adsorption and desorption kinetics of MOFs sorbents, therefore increasing the energy demand to achieve a kinetically efficient CO 2 capture and regeneration process. − To address the challenge of high diffusive resistance, a few approaches have been proposed. For instance, the length of organic linkers can be tailored to enlarge the pore dimensions, providing greater accessibility to molecules through quicker diffusion.…”

Section: Introductionmentioning

confidence: 99%

Defect Engineering of Low-Coordinated Metal–Organic Frameworks (MOFs) for Improved CO₂ Access and Capture

Niu

Tao

et al. 2023

ACS Appl. Mater. Interfaces

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While metal−organic frameworks (MOFs) are promising gas adsorbents, their tortuous microporous structures cause additional resistance for gas diffusion, thus hindering the accessibility of interior active sites. Here, we present a practical strategy to incorporate missing cluster defects into a representative low-coordinated MOFs structure, Mg-MOF-74, while maintaining the stability of a defect-rich structure. In this proposed method, graphene oxide (GO) is employed as modulator, and crystallization time is varied to promote defect formation by altering the nucleation and crystal growth processes. The best performing GOmodified Mg-MOF-74 sample (MOF@GO 40 h) achieved 18% and 15% improvement in surface area and total pore volume, respectively, over pristine Mg-MOF-74. The reduced diffusion resistance to gas flow translates to increased accessibility for gas molecules to active Mg adsorption sites inside the MOFs, leading to enhanced CO 2 capture performance; the CO 2 uptake quantity of MOF@GO 40 h arrives at 6.06 mmol/g at 0.1 bar and at 9.17 mmol/g at 1 bar and 25 °C, 19.29% and 16.37% higher, respectively, than that of the pristine Mg-MOF-74, with a CO 2 /N 2 selectivity around 17.36% greater than that of pristine Mg-MOF-74. Our study demonstrates a facile approach for incorporating defects into MOFs systems with low coordination environments, thus expanding the library of defect-rich MOFs beyond the current highly coordinated MOF systems.

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Section: Introductionmentioning

confidence: 99%

Defect Engineering of Low-Coordinated Metal–Organic Frameworks (MOFs) for Improved CO₂ Access and Capture

Niu

Tao

et al. 2023

ACS Appl. Mater. Interfaces

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“…Consequently, hierarchical porous MOFs with various mechanisms and their preparation methods are constantly emerging. 15,16,[30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45] The current methods used to construct hierarchically porous MOFs usually have some drawbacks. For example, the template is easily repelled during the crystal growth process.…”

Section: Introductionmentioning

confidence: 99%

Constructing strategies for hierarchically porous MOFs with different pore sizes and applications in adsorption and catalysis

Xiong

Chen

Yang

et al. 2022

Mater. Chem. Front.

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“…However, in order to develop MOF materials of high efficiency into real life applications, high-tech and sophisticated engineering is necessary for tuning their chemical structure and, hence, their properties at the macroscopic scale [9]. For example, at an industrial scale, properties such as the size and the shape of the corresponding MOF have profound effects on both the Energies 2022, 15, 1489 2 of 21 performance and the processes of the final application, and therefore need to be tailored accordingly [10].…”

Section: Introductionmentioning

confidence: 99%

Binding Materials for MOF Monolith Shaping Processes: A Review towards Real Life Application

et al. 2022

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Metal–organic frameworks (MOFs) could be utilized for a wide range of applications such as sorption, catalysis, chromatography, energy storage, sensors, drug delivery, and nonlinear optics. However, to date, there are very few examples of MOFs exploited on a commercial scale. Nevertheless, progress in MOF-related research is currently paving the way to new industrial opportunities, fostering applications and processes interconnecting fundamental chemistry with engineering and relevant sectors. Yet, the fabrication of porous MOF materials within resistant structures is a key challenge impeding their wide commercial use for processes such as adsorptive separation. In fact, the integration of nano-scale MOF crystallic structures into bulk components that can maintain the desired characteristics, i.e., size, shape, and mechanical stability, is a prerequisite for their wide practical use in many applications. At the same time, it requires sophisticated shaping techniques that can structure nano/micro-crystalline fine powders of MOFs into diverse types of macroscopic bodies such as monoliths. Under this framework, this review aims to bridge the gap between research advances and industrial necessities for fostering MOF applications into real life. Therefore, it critically explores recent advances in the shaping and production of MOF macro structures with regard to the binding materials that have received little attention to date, but have the potential to give new perspectives in the industrial applicability of MOFs. Moreover, it proposes future paths that can be adopted from both academy and industry and can further boost MOF exploitation.

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Hierarchical metal-organic framework (MOF) pore engineering

Cited by 34 publications

References 206 publications

Defect Engineering of Low-Coordinated Metal–Organic Frameworks (MOFs) for Improved CO₂ Access and Capture

Defect Engineering of Low-Coordinated Metal–Organic Frameworks (MOFs) for Improved CO₂ Access and Capture

Constructing strategies for hierarchically porous MOFs with different pore sizes and applications in adsorption and catalysis

Binding Materials for MOF Monolith Shaping Processes: A Review towards Real Life Application

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Hierarchical metal-organic framework (MOF) pore engineering

Cited by 34 publications

References 206 publications

Defect Engineering of Low-Coordinated Metal–Organic Frameworks (MOFs) for Improved CO2 Access and Capture

Defect Engineering of Low-Coordinated Metal–Organic Frameworks (MOFs) for Improved CO2 Access and Capture

Constructing strategies for hierarchically porous MOFs with different pore sizes and applications in adsorption and catalysis

Binding Materials for MOF Monolith Shaping Processes: A Review towards Real Life Application

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Product

Resources

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Defect Engineering of Low-Coordinated Metal–Organic Frameworks (MOFs) for Improved CO₂ Access and Capture

Defect Engineering of Low-Coordinated Metal–Organic Frameworks (MOFs) for Improved CO₂ Access and Capture