Polypyrrole-barium ferrite magnetic cryogels for water purification

0567344 - ÚMCH 2024 RIV CH eng J - Journal Article
Milakin, Konstantin A. - Taboubi, Oumayma - Acharya, Udit - Lhotka, M. - Pokorný, Václav - Konefal, Magdalena - Kočková, Olga - Hromádková, Jiřina - Hodan, Jiří - Bober, Patrycja
Polypyrrole-barium ferrite magnetic cryogels for water purification.
Gels. Roč. 9, č. 2 (2023), č. článku 92. E-ISSN 2310-2861
R&D Projects: GA ČR(CZ) GA21-01401S
Institutional support: RVO:61389013
Keywords : polypyrrole * barium ferrite * cryogel
OECD category: Polymer science
Impact factor: 4.6, year: 2022
Method of publishing: Open access
https://www.mdpi.com/2310-2861/9/2/92

Magnetic polypyrrole-gelatin-barium ferrite (PPy-G-BaFe) cryogels/aerogels were synthesized by one-step oxidative cryopolymerization of pyrrole in the presence of various fractions of barium ferrite (BaFe) nanoparticles, dispersed in aqueous gelatin solution. The successful incorporation of BaFe into the composites was confirmed by elemental analysis and scanning electron microscopy paired with an energy-dispersive X-ray detector. The maximum achieved content of BaFe in the resulting material was 3.9 wt%. The aerogels with incorporated BaFe had significantly higher specific surface area and conductivity, reaching 19.3 m2 g−1 and 4 × 10−4 S cm−1, respectively, compared to PPy-G aerogel, prepared in the absence of BaFe (7.3 m2 g−1 and 1 × 10−5 S cm−1). The model adsorption experiment using an anionic dye, Reactive Black 5, showed that magnetic PPy-G-BaFe aerogel, prepared at 10 wt% BaFe fraction, had significantly higher adsorption rate and higher adsorption capacity, compared to PPy-G (dye removal fraction 99.6% and 89.1%, respectively, after 23 h). Therefore, the prepared PPy-G-BaFe aerogels are attractive adsorbents for water purification due to their enhanced adsorption performance and the possibility of facilitated separation from solution by a magnetic field.

Permanent Link: https://hdl.handle.net/11104/0341393