Synthesis and catalytic activity of silver- reduced graphene oxide and silver- magnetite- reduced graphene oxide nanocomposites in the reduction of 4-nitrophenol DOI Creative Commons
Bahareh Kabiri, Hannaneh Heidari

Scientific Reports, Год журнала: 2025, Номер 15(1)

Опубликована: Апрель 25, 2025

The catalytic reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) is vital for environmental remediation. This study synthesizes and assesses silver-reduced graphene oxide (Ag/rGO) silver-magnetite-reduced (Ag/Fe2O4/rGO) nanocomposites 4-NP reduction. Various reducing agents-ascorbic acid (AA), hydrazine hydrate (HH), sodium borohydride (SBH), cellulose nanofibers (NFC)-were employed under reflux (R), hydrothermal (H), ultrasonic (U) conditions. Drying methods (oven-drying (O) freeze-drying (F)) CTAB as a stabilizer were explored optimize Ag NP distribution. characterized using FT-IR, XRD, FE-SEM, EDS, TEM, BET, TGA, ICP-OES, VSM. XRD confirmed formation with crystallite sizes 12-23 nm. FE-SEM TEM showed uniform distribution cubic Fe2O4 spherical NPs (approximately 50 nm) on GO. Ag/Fe2O4/rGO(O)-AA-U-F nanocomposite demonstrated the highest activity, pseudo-first-order rate constant (k) 1.81 min-1 specific activity parameter (k') 180.77 min-1.g-1. exhibited mesoporous structure high surface area (226.9 m2/g) nanoparticle rGO. combination ascorbic (AA) (F) yielded superior performance due their porous dispersion.

Язык: Английский

Synthesis and catalytic activity of silver- reduced graphene oxide and silver- magnetite- reduced graphene oxide nanocomposites in the reduction of 4-nitrophenol DOI Creative Commons
Bahareh Kabiri, Hannaneh Heidari

Scientific Reports, Год журнала: 2025, Номер 15(1)

Опубликована: Апрель 25, 2025

The catalytic reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) is vital for environmental remediation. This study synthesizes and assesses silver-reduced graphene oxide (Ag/rGO) silver-magnetite-reduced (Ag/Fe2O4/rGO) nanocomposites 4-NP reduction. Various reducing agents-ascorbic acid (AA), hydrazine hydrate (HH), sodium borohydride (SBH), cellulose nanofibers (NFC)-were employed under reflux (R), hydrothermal (H), ultrasonic (U) conditions. Drying methods (oven-drying (O) freeze-drying (F)) CTAB as a stabilizer were explored optimize Ag NP distribution. characterized using FT-IR, XRD, FE-SEM, EDS, TEM, BET, TGA, ICP-OES, VSM. XRD confirmed formation with crystallite sizes 12-23 nm. FE-SEM TEM showed uniform distribution cubic Fe2O4 spherical NPs (approximately 50 nm) on GO. Ag/Fe2O4/rGO(O)-AA-U-F nanocomposite demonstrated the highest activity, pseudo-first-order rate constant (k) 1.81 min-1 specific activity parameter (k') 180.77 min-1.g-1. exhibited mesoporous structure high surface area (226.9 m2/g) nanoparticle rGO. combination ascorbic (AA) (F) yielded superior performance due their porous dispersion.

Язык: Английский

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