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Issue 12, 2020
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Efficient reduction of graphene oxide to graphene nanosheets using a silica-based ionic liquid: synthesis, characterization and catalytic properties of IMD-Si/FeCl4@GNS

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Abstract

The aim of the present protocol is to develop a facile route for the synthesis of novel ionic liquid (IL)-functionalized graphene nano sheets (IMD-Si/FeCl4@GNS). An imidazolium IL with tetrachloroferrate as an anion (IMD-Si/FeCl4) was used to reduce graphene oxide. IMD-Si/FeCl4@GNS were well characterized using various techniques such as Fourier transform infrared (FTIR), Raman, ultraviolet-visible diffuse reflectance spectroscopy (UV-VIS DRS), scanning electron microscopy/energy dispersive X-ray (SEM/EDX), elemental mapping, transmission electron microscopy (TEM), powder X-ray diffraction (XRD), thermal gravimetry (TG), electron paramagnetic resonance (EPR), and X-ray photoelectron spectroscopy (XPS) analyses. The IL-functionalized material was investigated for its catalytic properties and found to be an efficient catalyst for the synthesis of (E)-selective substituted thiosemicarbazone derivatives. The (E)-selectivity was confirmed using DFT calculations which showed that the (E)-isomer was stabilized by 4.90 kcal mol−1 more than the (Z)-isomer. The catalyst maintained its catalytic activity for six successive runs.

Graphical abstract: Efficient reduction of graphene oxide to graphene nanosheets using a silica-based ionic liquid: synthesis, characterization and catalytic properties of IMD-Si/FeCl4−@GNS

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Supplementary files

Article information


Submitted
19 Nov 2019
Accepted
13 Feb 2020
First published
13 Feb 2020

New J. Chem., 2020,44, 4822-4833
Article type
Paper

Efficient reduction of graphene oxide to graphene nanosheets using a silica-based ionic liquid: synthesis, characterization and catalytic properties of IMD-Si/FeCl4@GNS

M. U. Khan, S. Siddiqui, W. A. Khan and Z. N. Siddiqui, New J. Chem., 2020, 44, 4822
DOI: 10.1039/C9NJ05768D

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