Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5148002 | International Journal of Hydrogen Energy | 2017 | 12 Pages |
Abstract
In the present study, novel composite membranes were prepared based on sulfonated poly (ether ether ketone)/phosphotungstic acid/carbon nitride nanosheets (SPEEK/HPW/g-C3N4). The alkaline ultrathin g-C3N4 nanosheets in the membranes behaved like “double-sided adhesive”, forming hydrogen bonds with the HPW molecules to anchor hydrophilic HPW without leaking. Moreover, the amine groups of nanosheets formed acid-base pairs with -SO3H of the SPEEK polymer matrix, facilitating the Grotthuss-type transport of proton to improve conductivity. The g-C3N4 inorganic particles provided tortuous pathways for methanol transport to suppress the methanol permeability coefficient. The selectivity of the SPEEK/HPW/g-C3N4-1.0 was 2.3 times higher than that of SPEEK/HPW and 1.5 times higher than that of pristine SPEEK. SPEEK/HPW/g-C3N4 hybrid membranes exhibited stable and durable operation for 240 h under 100% RH at 60 °C. Moreover, membranes exhibited superior mechanical property, with maximum elongation at break of 223.3%.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Cuicui Dong, Qian Wang, Chuanbo Cong, Xiaoyu Meng, Qiong Zhou,