A GO-assisted method for the preparation of ultrathin covalent organic framework membranes for gas separation

2016 ◽  
Vol 4 (35) ◽  
pp. 13444-13449 ◽  
Author(s):  
Yunpan Ying ◽  
Dahuan Liu ◽  
Jing Ma ◽  
Minman Tong ◽  
Weixin Zhang ◽  
...  
Keyword(s):  
Gas Separation ◽  
Separation Performance ◽  
Layer By Layer ◽  
Covalent Organic Framework ◽  
Ultrathin Membranes ◽  
Organic Framework

A GO-assisted layer-by-layer restacking method was proposed to prepare ultrathin membranes of CTF-1 nanosheets with a high H2/CO2 separation performance.

Few-layered ultrathin covalent organic framework membranes for gas separation: a computational study

2016 ◽  
Vol 4 (1) ◽  
pp. 124-131 ◽  
Author(s):  
Minman Tong ◽  
Qingyuan Yang ◽  
Qintian Ma ◽  
Dahuan Liu ◽  
Chongli Zhong
Keyword(s):  
Gas Separation ◽  
Computational Study ◽  
Separation Performance ◽  
Covalent Organic Framework ◽  
Organic Framework

This work found that energetic microenvironment controls the separation performance of few-layered 2D-COF membranes for CO2 capture.

Covalent Organic Framework–Covalent Organic Framework Bilayer Membranes for Highly Selective Gas Separation

2018 ◽  
Vol 140 (32) ◽  
pp. 10094-10098 ◽  
Author(s):  
Hongwei Fan ◽  
Alexander Mundstock ◽  
Armin Feldhoff ◽  
Alexander Knebel ◽  
Jiahui Gu ◽  
...  
Keyword(s):  
Gas Separation ◽  
Bilayer Membranes ◽  
Covalent Organic Framework ◽  
Organic Framework

Synthesis and gas permselectivity of CuBTC–GO–PVDF mixed matrix membranes

2018 ◽  
Vol 42 (14) ◽  
pp. 12013-12023 ◽  
Author(s):  
Elahe Ahmadi Feijani ◽  
Hossein Mahdavi ◽  
Ahmad Tavassoli
Keyword(s):  
Graphene Oxide ◽  
Gas Separation ◽  
Metal Organic Framework ◽  
Mixed Matrix Membranes ◽  
Separation Performance ◽  
Mixed Matrix ◽  
Metal Organic ◽  
Gas Separation Performance ◽  
Organic Framework ◽  
Matrix Membranes

A CuBTC (copper(ii) benzene-1,3,5-tricarboxylate) metal organic framework (MOF) and graphene oxide (GO) nanosheets were introduced into a semi-crystalline PVDF to produce mixed matrix membranes (MMMs) to promote gas separation performance.

scholarly journals A self-assembling, biporous, metal-binding covalent organic framework and its application for gas separation

2021 ◽  
Author(s):  
Veronica Spaulding ◽  
Katarina Zosel ◽  
Phuoc Duong ◽  
Dongmei Li ◽  
Bruce A Parkinson ◽  
...  
Keyword(s):  
Gas Separation ◽  
Metal Binding ◽  
The Novel ◽  
Two Dimensional ◽  
Covalent Organic Framework ◽  
Self Assembling ◽  
Organic Framework

We report a unique synthesis of a nanoporous two-dimensional covalent organic framework (COF) from a single self-assembling monomer. The novel 2D-COF contains two chemically distinct nanopores, one that can coordinate...

scholarly journals Hydrogen Separation Performance of UiO-66-NH2 Membranes Grown via Liquid-Phase Epitaxy Layer-by-Layer Deposition and One-Pot Synthesis

Membranes ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 735
Author(s):  
Alessandro Micero ◽  
Tawheed Hashem ◽  
Hartmut Gliemann ◽  
Aline Léon
Keyword(s):  
Separation Factor ◽  
Metal Organic Framework ◽  
International Standards ◽  
Separation Performance ◽  
Layer By Layer ◽  
Hydrogen Fuel ◽  
Equimolar Ratio ◽  
One Pot ◽  
Metal Organic ◽  
Organic Framework

The quality assurance of hydrogen fuel for mobile applications is assessed by the guidelines and directives given in the European and international standards. However, the presence of impurities in the hydrogen fuel, in particular nitrogen, water, and oxygen, is experienced in several refueling stations. Within this work, metal-organic framework (MOF)-based membranes are investigated as a fine-purification stage of the hydrogen fuel. Three H2/N2 concentrations have been used to analyze the separation factor of UiO-66-NH2 membranes prepared using the layer-by-layer (LBL) and the one-pot (OP) synthesis methods. It is shown that the separation factor for an equimolar ratio is 14.4% higher for the LBL sample compared to the OP membrane, suggesting a higher orientation and continuity of the LBL surface-supported metal-organic framework (SURMOF). Using an equimolar ratio of H2/N2, it is shown that selective separation of hydrogen over nitrogen occurs with a separation factor of 3.02 and 2.64 for the SURMOF and MOF membrane, respectively. To the best of our knowledge, this is the highest reported performance for a single-phase UiO-66-NH2 membrane. For higher hydrogen concentrations, the separation factor decreases due to reduced interactions between pore walls and N2 molecules.

scholarly journals Ultrafast layer-by-layer assembly of PDMS for boosting the H2 separation of a P84 membrane

2021 ◽  
Author(s):  
Guozhen Li ◽  
Zhihao Si ◽  
Shuai Yang ◽  
Tanlong Xue ◽  
Jan Baeyens ◽  
...  
Keyword(s):  
Gas Separation ◽  
Uv Curing ◽  
Separation Performance ◽  
Layer By Layer ◽  
Pdms Layer ◽  
Cycle Times ◽  
Assembly Strategy ◽  
Layer By Layer Assembly ◽  
Free Membrane ◽  
Layer Assembly

BTDA-TDI/MDI (P84) has been widely applied in gas separation, however, pinholes or defects on P84 membrane surfaces were formed in the membrane preparation process and directly weaken its separation performance. Herein, we developed an ultrafast polydimethylsiloxane (PDMS) layer-by-layer assembly strategy via spraying method to heal the defects of the P84 membrane. Firstly, a very short assembly time 20-30 s was achieved by a UV-curing method. Secondly, both the PDMS spraying concentration and cycle times were optimized to strengthen the healing ability of PDMS. The P84-PDMS membrane with 3 wt % PDMS spraying concentration and 2 spraying cycle times significantly improve the H2/CH4 selectivity from 62.99 to 231.92 with a satisfactory H2 permeance (20.85 GPU). The layer-by-layer PDMS assembly strategy for healing defects of P84 membrane displays outstanding comprehensive abilities, with an easy manufacturing based upon ultrafast curing and excellent gas separation performance based on the defect-free membrane structure.

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