Akademik Veri Yönetim Sistemi
Polyhedron, cilt.293, 2026 (SCI-Expanded, Scopus)
AbstractA facile and environmentally friendly method is reported for the construction of a poly(tannic acid) and diethylenetriamine co-deposited on magnetic reduced graphene oxide (p(TA-co-DETA)@mag-rGO) composite via self-polymerization of TA and the Michael addition of DETA in an alkaline medium. The p(TA-co-DETA) layer not only provides a host material for the deposition gold nanoparticles (Au NPs) but also functions as both a reducing and a capping agent. The nanocomposite, Au-p(TA-co-DETA)@mag-rGO, was fully characterized by various analytical techniques. The results indicated that mag-rGO was homogeneously coated with a polymer layer with a thickness of 27 nm, and Au NPs were highly dispersed with a mean diameter of 12 nm on the p(TA-co-DETA)@mag-rGO. The nanocomposite exhibited excellent catalytic performance in the reduction of nitroanilines, utilizing NaBH4 as the reductant at room temperature. The apparent rate constant (kapp) values for 4-nitroaniline, 2-nitroaniline, and 2,4-dinitronitroaniline were determined to be 4.16, 3.87, and 1.89 min−1, respectively, with complete conversion achieved within 60–140 s. Notably, the nanocomposite is highly reusable for five consecutive cycles without significant decrease in its catalytic performance and is easily recovered from the reaction solution using a simple magnet. The unique combination of Au NPs, p(TA-co-DETA), and mag-rGO renders this material a versatile platform with promising potential for various catalytic applications.