Silver nanoparticle-decorated on tannic acid-modified magnetite nanoparticles (Fe3O4@TA/Ag) for highly active catalytic reduction of 4-nitrophenol, Rhodamine B and Methylene blue

Tannic acid, as a humic-like substance with phenolic hydroxyl and carbonyl functional groups, can modify the surface of Fe3O4 nanoparticles (NPs). Moreover, it can improve surface properties and capacity of Fe3O4 for adsorption and reduction of silver ions through complexing with them, in aqueous so...

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Bibliographic Details
Published in:	Materials Science & Engineering C Vol. 100; pp. 445 - 452
Main Authors:	Veisi, Hojat, Moradi, Seyed Behzad, Saljooqi, Asma, Safarimehr, Parisa
Format:	Journal Article
Language:	English
Published:	Netherlands Elsevier B.V 01-07-2019 Elsevier BV
Subjects:	Aqueous solutions Atomic beam spectroscopy Carbonyls Catalysis Chemical reduction Coloring Agents - chemistry Dyes Emission spectroscopy Energy dispersive X ray spectroscopy Field emission microscopy Fourier transforms Functional groups Inductively coupled plasma Infrared spectroscopy Ions Iron oxides Kinetics Magnetite Magnetite nanoparticles Magnetite Nanoparticles - chemistry Magnetite Nanoparticles - ultrastructure Materials science Metal Nanoparticles - chemistry Metal Nanoparticles - ultrastructure Methylene blue Methylene Blue - chemistry Microscopy Nanoparticles Nitrophenol Nitrophenols - chemistry Phenolic compounds Phenols Photoelectron Spectroscopy Photoelectrons Reduction Rhodamine Rhodamines - chemistry Scanning electron microscopy Silver Silver - chemistry Spectrometry, X-Ray Emission Spectrophotometry, Ultraviolet Spectroscopy Spectrum analysis Surface properties Tannic acid Tannins - chemistry Time Factors Transmission electron microscopy X ray photoelectron spectroscopy X-ray spectroscopy Tannic acid Magnetite nanoparticles Silver Reduction Dyes
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Summary:	Tannic acid, as a humic-like substance with phenolic hydroxyl and carbonyl functional groups, can modify the surface of Fe3O4 nanoparticles (NPs). Moreover, it can improve surface properties and capacity of Fe3O4 for adsorption and reduction of silver ions through complexing with them, in aqueous solutions. Therefore, Fe3O4@TA NPs have potential of reducing, stabilizing and immobilizing silver nanoparticles to generate novel magnetic silver nanocatalyst. The nanocatalyst was characterized by several techniques such as Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP), Transmission electron microscopy (TEM), Field Emission Scanning Electron Microscopy (FE-SEM), X-ray photoelectron spectroscopy (XPS), Energy-dispersive X-ray spectroscopy (EDS), Vibrating Sample Magnetometer (VSM) and Fourier-transform infrared spectroscopy (FTIR). The results of characterization showed that the Fe3O4@TA/Ag nanocatalyst was successfully synthesized. It was observed that the Fe3O4@TA/Ag NP is the useful and recyclable, which can catalyze the reduction of different dyes, including 4-nitrophenol (4-NP), Rhodamine B (RhB), and Methylene blue (MB) in the presence of NaBH4 in the aqueous medium at room temperature. With the help of UV–Vis spectroscopy, catalysis reactions were controlled. According to results, these reactions followed the pseudo-first-order rate equation. [Display omitted] •Surface modification of Fe3O4 nanoparticle with Tannic groups was achieved.•Tannic-groups played an important role as a capping and stabilizing agent for Ag nanoparticles.•Fe3O4@TA/Ag show high catalytic activity for degradation of 4-nitrophenol (4-NP), Rhodamin B (RhB), and Methylene blue (MB).•The nanocatalyst can be magnetically recycled from reaction solutions without losing its high efficiency.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0928-4931 1873-0191
DOI:	10.1016/j.msec.2019.03.036