Synthesis of a Ni_0.8Zn_0.2Fe₂O₄–RGO nanocomposite: an excellent magnetically separable catalyst for dye degradation and microwave absorber

Abstract

A Ni0.8Zn0.2Fe2O4 reduced graphene oxide nanocomposite has been synthesized by a simple ‘in situ co-precipitation’ technique.

A facile synthesis methodology for preparation of Ag–Ni-reduced graphene oxide: a magnetically separable versatile nanocatalyst for multiple organic reactions and density functional study of its electronic structures

“…For the last couple of decades, the applications of graphene and graphene-based materials have been explored extensively in myriad elds including electronics, sensors, solar cells, structural materials, catalysis, microwave absorbing materials, supercapacitors, etc. [1][2][3][4][5] Graphene has proved its capability to become a material of paramount importance by exhibiting several excellent properties (such as, electrical conductivity, mechanical strength, chemical stability, lightweight, etc.). 1,2,6,7 Several researchers have reported the application of graphene or Reduced Graphene Oxide (RGO) as the support to construct heterogeneous catalysts, where catalytically active sites are immobilized on the surface of graphene or RGO sheets.…”

“…It is also expected that the high conducting nature of RGO will help in the electron transfer process of these catalysis reactions. 1,3,6 Herein, we are reporting an 'in situ' co-precipitation reduction technique for the preparation of a versatile catalyst, ((Ag x -Ni (1Àx) ) y RGO (100Ày) ), for (i) reduction reaction of 4-nitrophenol (4-NP) in presence of NaBH 4 , (ii) A3 coupling reaction for the synthesis of propargylamines, (iii) epoxidation reaction of styrene, and (iv) 'Click reaction' for the synthesis of 1,2,3-triazole derivatives in aqueous medium and magnetic recovery and reusability of the catalyst. We have also performed the rstprinciples calculations based on Density Functional Theory (DFT) to understand how the interfacial interactions between Ag, Ni, and RGO inuence their electronic structures, due to which the synergistic effect originates and the synthesized catalyst exhibits superior catalytic activity.…”

Effect of SiC layer on microwave absorption properties of novel three-dimensional interconnected SiC foam with double-layer hollow skeleton

“…Wireless communication technology is a double-edged sword, which brings a lot of electromagnetic (EM) pollution while providing convenience to people [1][2][3][4][5][6]. EM pollution has become one of the most serious environmental pollution that needs to be solved urgently.…”

Preparation and Characterization of Copper Chromium Oxide Nanoparticles Using Modified Sol‐Gel Route and Evaluation of Their Microwave Absorption Properties

“…Thus, polyaniline, SiC, polypyrrole, polythiophene, and carbon nanotube due to the dielectric properties and magnetic materials such as spinel ferrites_ENREF_16, hexagonal ferrites, Fe 0 , Co, and Ni have attracted considerable attentions. Among the dielectric materials, the 2D structures including graphene, MXenes, and graphite‐like carbon nitride play the vital role for microwave absorption and electromagnetic interference shielding. The impedance matching is the vital agent affecting the microwave absorption characteristics, related to the adjustment of the magnetic and dielectric properties of the absorbers .…”