Yavuz, CenapKarakoyun, Necdet2025-09-032025-09-0320260025-54081873-422710.1016/j.materresbull.2025.1137222-s2.0-105013494626https://doi.org/10.1016/j.materresbull.2025.113722Karakoyun, Necdet/0000-0002-6083-6921Water contamination by nitroaromatic compounds and synthetic dyes poses serious environmental and health hazards, requiring the development of efficient, recyclable, and eco-friendly catalytic systems. In this study, a magnetically recyclable Pd-PAAm@Fe3O4 nanocatalyst was synthesized via surface grafting and reduction techniques, ensuring uniform dispersion of Pd0 nanoparticles on polyacrylamide-modified Fe3O4 without toxic reducing agents. The catalyst exhibited excellent activity for reducing 2-NP, 4-NP, 2,4-dinitrophenol, 2-NA, 4NA, and 2,4-dinitroaniline, following pseudo-first-order kinetics, with the highest kapp value of 5.23 min-1. It also showed rapid degradation of organic dyes, achieving complete decolorization of methyl orange in 45 s and methylene blue in 120 s. The catalyst retained over 99 % efficiency for 4-NP reduction over five cycles, with low Pd leaching (0.10-0.16 %) and stable structure confirmed by XRD, SEM, TEM, and XPS, highlighting its potential for sustainable environmental remediation.eninfo:eu-repo/semantics/closedAccessPd NanoparticlesPolyacrylamideNitroaromaticDye RemovalSuperparamagnetic CatalystArticle194Q2Q1WOS:001560200200003