Facile synthesis of hyperbranched magnetic nanospheres for highly efficient removal of methyl orange

• Published in: New journal of chemistry Vol. 48; no. 22; pp. 9945 - 9953
• Main Authors: Song, Jinting, Chen, Sufang, Lyu, Renliang, Zhang, Daohong, Hong, Jingping
• Format: Journal Article
• Language: English
• Published: Cambridge Royal Society of Chemistry 2024
• Subjects: Adsorption; Crosslinking; Dyes; Iron oxides; Magnetic materials; Magnetic properties; Microspheres; Nanospheres; Recyclability
• ISSN: 1144-0546; 1369-9261
• DOI: 10.1039/d4nj00423j

Amino-terminated hyperbranched polymer (ATHP1) coated magnetic microspheres (Fe 3 O 4 -ATHP1) was synthesized using amino-modified ferric tetroxide (Fe 3 O 4 -NH 2 ) as the core and glutaraldehyde as a cross-linking agent. The adsorption properties of Fe 3 O 4 -ATHP1 and Fe 3 O 4 -NH 2 for methyl orange (MO) adsorption were investigated and compared. ATHP1 functionalization was found to significantly improve the MO adsorption properties of the magnetic material. It was proved that Fe 3 O 4 -ATHP1 exhibited excellent adsorption performance at pH values ranging from 3 to 10 and in concentrations ranging from 10 mg L −1 to 50 mg L −1 . Besides, easy separation and good recyclability were also observed for Fe 3 O 4 -ATHP1; after six cycles, it still had an over 78% removal capacity for methyl orange. The adsorption mechanism was also studied, and the MO adsorption mechanism on Fe 3 O 4 -ATHP1 followed the pseudo-secondary kinetic model and the Langmuir adsorption isothermal model. Hyperbranched ATHP1 coated magnetic microspheres were successfully synthesized. Fe 3 O 4 @ATHP1 has an excellent adsorption ability for methyl orange. Fe 3 O 4 @ATHP1 exhibits easy separation and good recyclability.