scholarly journals Membrane adsorbers with ultrahigh metal-organic framework loading for high flux separations

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Hang Wang ◽  
Shuang Zhao ◽  
Yi Liu ◽  
Ruxin Yao ◽  
Xiaoqi Wang ◽  
...  
Keyword(s):  
High Performance ◽  
Organic Dyes ◽  
Metal Organic Framework ◽  
Water Flux ◽  
Mixed Matrix Membranes ◽  
High Porosity ◽  
Water Permeation ◽  
Cross Flow Filtration ◽  
Metal Organic ◽  
Membrane Adsorbers

Abstract Metal-organic frameworks (MOFs) with high porosity and designable functionality make it possible to access the merits of high permeability and selectivity. However, scalable fabrication methods to produce mixed matrix membranes (MMMs) with good flexibility and ultrahigh MOF loading are urgently needed yet largely unmet. Herein, we report a thermally induced phase separation-hot pressing (TIPS-HoP) strategy to roll-to-roll produce 10 distinct MOF-membranes (loadings up to 86 wt%). Ultrahigh-molecular-weight polyethylene interweaving the MOF particles contributes to their mechanical strength. Rejections (99%) of organic dyes with a water flux of 125.7 L m–2 h–1 bar–1 under cross-flow filtration mode. The micron-sized channels between the MOF particles translate into fast water permeation, while the porous MOFs reject solutes through rapid adsorption. This strategy paves ways for developing high-performance membrane adsorbers for crucial separation processes. As a proof-of-concept, the abilities of the membrane adsorbers for separating racemates and proteins have been demonstrated.

Highly stable metal-organic framework UiO-66-NH2 for high-performance triboelectric nanogenerators

2021 ◽  
Author(s):  
Yong-Mei Wang ◽  
Xinxin Zhang ◽  
Dingyi Yang ◽  
Liting Wu ◽  
Jiaojiao Zhang ◽  
...  
Keyword(s):  
High Performance ◽  
Metal Organic Framework ◽  
High Surface ◽  
High Surface Area ◽  
Triboelectric Nanogenerator ◽  
High Porosity ◽  
Chemically Modified ◽  
Metal Organic ◽  
Triboelectric Nanogenerators ◽  
Organic Framework

Abstract The high porosity, controllable size, high surface area, and chemical versatility of a metal-organic framework (MOF) enable it a good material for a triboelectric nanogenerator (TENG), and some MOFs have been incorporated in the fabrication of TENGs. However, the understanding of effects of MOFs on the energy conversion of a TENG is still lacking, which inhibits the improvement of the performance of MOF-based TENGs. Here, UiO-66-NH2 MOFs were found to significantly increase the power of a TENG and the mechanism was carefully examined. The electron-withdrawing ability of Zr-based UiO-66-family MOFs was enhanced by designing the amino functionalized 1,4-terephthalic acid (1,4-BDC) as ligand. The chemically modified UiO-66-NH2 was found to increase the surface roughness and surface potential of a composite film with MOFs embedded in polydimethylsiloxane (PDMS) matrix. Thus the total charges due to the contact electrification increased significantly. The composite-based TENG was found to be very durable and its output voltage and current were 4 times and 60 times higher than that of a PDMS-based TENG. This work revealed an effective strategy to design MOFs with excellent electron-withdrawing abilities for high-performance TENGs.

scholarly journals Towards High Performance Metal-Organic Framework-Microporous Polymer Mixed Matrix Membranes: Addressing Compatibility and Limiting Aging by Polymer Doping

2018 ◽  
Vol 24 (49) ◽  
pp. 12796-12800 ◽  
Author(s):  
Anahid Sabetghadam ◽  
Xinlei Liu ◽  
Angelica F. Orsi ◽  
Magdalena M. Lozinska ◽  
Timothy Johnson ◽  
...  
Keyword(s):  
High Performance ◽  
Metal Organic Framework ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Microporous Polymer ◽  
Metal Organic ◽  
Organic Framework ◽  
Matrix Membranes

High-performance adsorption and separation of anionic dyes in water using a chemically stable graphene-like metal–organic framework

2017 ◽  
Vol 46 (31) ◽  
pp. 10197-10201 ◽  
Author(s):  
Jun-Jiao Li ◽  
Chong-Chen Wang ◽  
Hui-fen Fu ◽  
Jing-Rui Cui ◽  
Peng Xu ◽  
...  
Keyword(s):  
High Performance ◽  
Organic Dyes ◽  
Metal Organic Framework ◽  
Anionic Dyes ◽  
Rapid Separation ◽  
Selective Uptake ◽  
Metal Organic ◽  
Organic Framework

MOF BUC-17 was used to conduct efficiently selective uptake of organic dyes, and achieve rapid separation of CR and MB from their mixture.

scholarly journals Rational Design of MOF-Based Materials for Next-Generation Rechargeable Batteries

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Zhengqing Ye ◽  
Ying Jiang ◽  
Li Li ◽  
Feng Wu ◽  
Renjie Chen
Keyword(s):  
High Performance ◽  
Rational Design ◽  
Metal Organic Framework ◽  
Rechargeable Batteries ◽  
High Porosity ◽  
Next Generation ◽  
Battery System ◽  
Lithium Sulfur Batteries ◽  
Metal Organic ◽  
Lithium Oxygen Batteries

AbstractMetal–organic framework (MOF)-based materials with high porosity, tunable compositions, diverse structures, and versatile functionalities provide great scope for next-generation rechargeable battery applications. Herein, this review summarizes recent advances in pristine MOFs, MOF composites, MOF derivatives, and MOF composite derivatives for high-performance sodium-ion batteries, potassium-ion batteries, Zn-ion batteries, lithium–sulfur batteries, lithium–oxygen batteries, and Zn–air batteries in which the unique roles of MOFs as electrodes, separators, and even electrolyte are highlighted. Furthermore, through the discussion of MOF-based materials in each battery system, the key principles for controllable synthesis of diverse MOF-based materials and electrochemical performance improvement mechanisms are discussed in detail. Finally, the major challenges and perspectives of MOFs are also proposed for next-generation battery applications.

scholarly journals Robust ultrathin nanoporous MOF membrane with intra-crystalline defects for fast water transport

2022 ◽  
Vol 13 (1) ◽  
Author(s):  
Xueling Wang ◽  
Qiang Lyu ◽  
Tiezheng Tong ◽  
Kuo Sun ◽  
Li-Chiang Lin ◽  
...  
Keyword(s):  
Water Transport ◽  
High Performance ◽  
Rational Design ◽  
Molecular Level ◽  
Metal Organic Framework ◽  
Water Flux ◽  
Three Dimensional ◽  
Water Permeation ◽  
Crystalline Defect ◽  
Dynamics Simulations

AbstractRational design of high-performance stable metal–organic framework (MOF) membranes is challenging, especially for the sustainable treatment of hypersaline waters to address critical global environmental issues. Herein, a molecular-level intra-crystalline defect strategy combined with a selective layer thinning protocol is proposed to fabricate robust ultrathin missing-linker UiO-66 (ML-UiO-66) membrane to enable fast water permeation. Besides almost complete salt rejection, high and stable water flux is achieved even under long-term pervaporation operation in hash environments, which effectively addresses challenging stability issues. Then, detailed structural characterizations are employed to identify the type, chemical functionality, and density of intra-crystalline missing-linker defects. Moreover, molecular dynamics simulations shed light on the positive atomistic role of these defects, which are responsible for substantially enhancing structural hydrophilicity and enlarging pore window, consequently allowing ultra-fast water transport via a lower-energy-barrier pathway across three-dimensional sub-nanochannels during pervaporation. Unlike common unfavorable defect effects, the present positive intra-crystalline defect engineering concept at the molecular level is expected to pave a promising way toward not only rational design of next-generation MOF membranes with enhanced permeation performance, but additional water treatment applications.

A binuclear Co-based metal-organic framework towards efficient oxygen evolution reaction

2021 ◽  
Author(s):  
Ning Liu ◽  
Qiaoqiao Zhang ◽  
Jingqi Guan
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Performance ◽  
Low Cost ◽  
Metal Organic Framework ◽  
Research Interest ◽  
Metal Organic ◽  
Organic Framework

Seeking for low-cost and high-performance electrocatalysts for oxygen evolution reaction (OER) has drawn enormous research interest in the last few years. Reported herein is the topotactic construction of a binuclear...

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