Constructing Amino-Functionalized Flower-like Metal–Organic Framework Nanofibers in Sulfonated Poly(ether sulfone) Proton Exchange Membrane for Simultaneously Enhancing Interface Compatibility and Proton Conduction

2019 ◽  
Vol 11 (43) ◽  
pp. 39979-39990 ◽  
Author(s):  
Liyuan Wang ◽  
Nanping Deng ◽  
Gang Wang ◽  
Jingge Ju ◽  
Bowen Cheng ◽  
...  
Keyword(s):  
Proton Exchange Membrane ◽  
Metal Organic Framework ◽  
Proton Conduction ◽  
Proton Exchange ◽  
Metal Organic ◽  
Exchange Membrane ◽  
Sulfonated Poly ◽  
Organic Framework

scholarly journals A Dual-Function Cobalt Metal-Organic Framework for High Proton Conduction and Selective Luminescence Sensing of Histidine

2022 ◽  
Author(s):  
guomei wu ◽  
Wen-Jing Li ◽  
Libin Yang ◽  
chenxi zhang
Keyword(s):  
Proton Conductivity ◽  
Proton Exchange Membrane ◽  
Metal Organic Framework ◽  
Composite Membranes ◽  
Proton Exchange ◽  
Dual Function ◽  
Ac Impedance Analysis ◽  
Metal Organic ◽  
Exchange Membrane ◽  
Organic Framework

Abstract Proton exchange membrane (PEM) is a key component of proton exchange membrane fuel cells (PEMFCs). In recent years, metal organic framework (MOF) and its composite membranes have become the research hotspots. [Co(L-Glu)(H2O)•H2O]n (Co-MOF, L-Glu = L-glutamate) was synthesized by hydrothermal method. Co2+ ions are coordinated with L-Glu ligands and water molecules to form one-dimensional chains extending along the a-axis, which are further bridged by L-Glu ligands to form a three-dimensional network structure. AC impedance analysis shows that the proton conductivity of Co-MOF reaches 3.14×10-4 S•cm-1 under 98% relative humidity (RH) and 338 K. To improve proton conductivity, different contents of Co-MOF were added in chitosan (CS) to form composite membranes Co-MOF@CS-X (mass fraction X= 5%, 10%, 15% wt). The results show the proton conductivity of the Co-MOF@CS-10 composite membrane is 1.73×10-3 S•cm-1 at 358 K and 98% RH, which is more than 5 times that of Co-MOF. As far as we known, this is the first composite made of amino acid MOFs and CS as proton exchange membrane. Furthermore, Co-MOF has an obvious quenching effect on L-histidine in aqueous solution, which can detect the content of L-histidine in water with high sensitivity, and the detection limit is 1×10-7 M.

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