Utilization of Water-Insoluble Carbon Nitride-Phosphotungstic Acid Hybrids in Composite Proton Exchange Membranes
Phosphotungstic acid (HPW) can retain water in proton exchange membranes to increase proton conductivity; however, its water-soluble nature limits further application. In this work, we combined HPW and graphitic carbon nitride (g-C N ) via sintering to prepare water-insoluble hybrids (HWN), where HP...
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Published in | Membranes (Basel) Vol. 14; no. 9; p. 195 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Switzerland
MDPI AG
13.09.2024
MDPI |
Subjects | |
Online Access | Get full text |
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Summary: | Phosphotungstic acid (HPW) can retain water in proton exchange membranes to increase proton conductivity; however, its water-soluble nature limits further application. In this work, we combined HPW and graphitic carbon nitride (g-C
N
) via sintering to prepare water-insoluble hybrids (HWN), where HPW was chemically linked to g-C
N
to fix HPW. Then, HWN fillers were added to a sulfonated polyether ether ketone (SPEEK) matrix to prepare composite membranes. The conductivity of the composite membrane with 10 wt% HWN is up to 0.066 S cm
at room temperature, which is 53% higher than that of the SPEEK control membrane (0.043 S cm
). The composite membrane also showed stable proton conductivity after being immersed in water for 2000 h. Therefore, our study demonstrates that preparing water-insoluble nanofillers containing HPW components through sintering is a promising approach. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 2077-0375 2077-0375 |
DOI: | 10.3390/membranes14090195 |