Reductant-Free and In-Situ Green Synthesis of Ag Nanoparticles on Fe3O4@Nanocellulose and Their Catalytic Activity for the Reduction of Dyes

摘要

In this work, magnetic nanofibrillated cellulose (Fe3O4@NFC) was prepared and used as green support and reducing agent for the facile synthesis of silver nanoparticles (Ag NPs) by the reflux and hydrothermal methods. The structure of the as- prepared composites was characterized by various spectro- scopic techniques including X-ray diffraction, Fourier transform infrared spectroscopy, field emission scanning electron micro- scopy, energy dispersive spectroscopy, inductively coupled plasma atomic emission spectroscopy, vibrating sample magnetometer, and nitrogen adsorption-desorption isotherms. The catalytic activity of synthetic nanocomposites by the reflux (Fe3O4@NFC/Ag-1) and hydrothermal (Fe3O4@NFC/Ag-2) meth- ods was investigated in the removal of organic dyes. Moreover, the effects of catalyst amounts, pH values, and drying process on the catalytic activity were also evaluated.