@article{article_1754921, title={Performance of polysulfone-based bipolar membranes modified with structurally diverse MXenes for electrodialytic acid–base recovery}, journal={Niğde Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi}, pages={1–9}, year={2026}, DOI={10.28948/ngumuh.1754921}, author={Çelik, Aytekin and Yegin, Mustafa and Halisdemir, Umay}, keywords={Mxene, BPM, BMED Sistemi, Asit ve Baz Geri Kazanımı}, abstract={This study explores the influence of various MXene types on the performance and structure of polysulfone-based bipolar membranes (BPMs) used in bipolar membrane electrodialysis (BMED) for acid and base recovery from synthetic saline solutions. BPMs were fabricated by sulfonation and chloromethylation of polysulfone, forming anionic and cationic layers, with MXenes incorporated as interfacial modifiers at 0.1 g and 0.3 g loadings. Five MXene variants—Ti₃C₂Tₓ (HF and LiF+HCl etching), Ti₃CNTₓ (both etching methods), and Ti₄N₃Tₓ (molten salt synthesis)—were studied. XRD confirmed characteristic MXene structures, while FTIR verified functional groups on modified polymers. Performance tests revealed HF-etched Ti₃C₂Tₓ MXene-containing BPMs exhibited superior acid and base production, with Na⁺ concentrations in the base tank reaching 275 ppm at 0.1 g MXene and 325 ppm at 0.3 g, compared to 75 ppm without MXene. Ti₃C₂Tₓ outperformed nitrogen-containing MXenes due to higher surface functionality and carbon-based lattice structure enhancing ion transport. Findings highlight MXene type and loading as key factors affecting BPM efficiency and economic feasibility in sustainable water treatment.}, number={15}, publisher={Niğde Ömer Halisdemir Üniversitesi}, organization={TÜBİTAK}