Facile synthesis of decorated graphene oxide sheets with WO3 nanoparticles

Abstract

Potential applications of graphene oxide (GO) nanocomposites have attracted remarkable attention to modify its properties by functionalizing and decorating with nanoparticles. In this work, after synthesis of GO sheets by oxidation and exfoliation of natural graphite, they were decorated with tungsten oxide nanoparticles using arc discharge in GO solution. Transmission electron microscopy shows that the chain of WO 3 nanoparticles decorates the GO sheets. Fourier transform infrared spectroscopy and Raman spectroscopy show that WO 3 nanoparticles are attached to GO sheets by bond formation between the tungsten and oxygen of functional groups, especially with epoxides on the GO sheets. Nanocomposite production in different arc currents shows that the greater the electrical current, the stronger the bond is formed between WO 3 and GO. X-ray diffraction confirms that the WO 3 nanoparticles on the GO are highly crystalline in monoclinic phase. Moreover, by increasing the arc current from 20 to 40 A, the band gap energy of GO ? WO 3 decreases to *2.6 eV.

rGO-WO3 Heterostructure: Synthesis, Characterization and Utilization as an Efficient Adsorbent for the Removal of Fluoroquinolone Antibiotic Levofloxacin in an Aqueous Phase

“…The peaks at 274, 773 and 917 cm −1 were related to the presence of WO 3 nanorods. D and G bands were observed at 1348 and 1593 cm −1 , respectively [ 51 , 52 , 55 , 56 ]. The D band established the presence of a defective carbon structure, including edges and imperfections of sp 3 -hybridized carbon, and the G band is associated with the existence of well-defined sp 2 -bonded carbon atoms.…”

Quantum Confinement Regime of MO-Polymer Nanostructures and the Inclusion of RGO Forming Effective Combination for Enhanced Photocatalytic Properties

“…The peak at 2990 cm −1 occurs as a result of lattice disorders by the combination of G and D peaks. Raman band at 322 cm −1 indicates the presence of GO+WO 3 . The peak at 805 cm −1 represents the bending vibration δ (O−W‐O) and 920 cm −1 is assigned to the stretching mode of the terminal W=O …”

Electrochemical performance of decorated reduced graphene oxide by MoO3 nanoparticles as a counter electrode

“…To decorate MoO3 nanoparticles on GO nanosheets, we used the arc-discharge method by semi-auto arc discharge device [38,39]. Two molybdenum electrodes as the cathode and anode with 3 mm diameter and 99.8% purity were placed in GO aqueous solution.…”