α-Fe2O3/graphene oxide powder and thin film nanocomposites as peculiar photocatalysts for dye removal from wastewater

Abstract

In this study, hematite graphene oxide (αFe2O3-GO) powder nanocomposites and thin-film hematite graphene oxide (αFe2O3-GO) were synthesized for application in the removal of Rhodamine B (RhB) from textile wastewater. αFe2O3-GO nanomaterials were placed onto the FTO substrate to form a thin layer of nanocomposites. Different analysis including XRD, FTIR, Raman spectra, XPS, and FESEM were done to analyze the morphology, structure, and properties of the synthesized composites as well as the chemical interactions of αFe2O3 with GO. The photocatalytic performance of two synthesized composites was compared with different concentrations of αFe2O3-GO. The results showed that powder nanocomposites are more effective than thin-film composites for the removal of RhB dye. αFe2O3-GO-5% powder nanocomposites removed over 64% of dye while thin-film nanocomposites had less removal efficiencies with just under 47% removal rate. The reusability test was done for both materials in which αFe2O3-GO-5% powder nanocomposites removed a higher rate of dye (up to 63%) in more cycles (6 cycles).

Magnetism and Raman Investigations of Hydrothermally Reduced Graphene Oxide-Incorporated α-Fe2O3 Nanocomposites: The Role of Temperature-Dependent Charge Transfer-Induced Interfacial Interactions

“…The reduced intensity along with the slight shifting in binding energies of both oxygen-related C–O/C–OH and CO groups confirm the partial reduction of GO into PRGO . Likewise, the binding energies of C 1s spectra of FO signify the increase in carbon content in NC following the addition of PRGO . The high-resolution Fe 2p spectra and associated convoluted peaks for FRGO are displayed in Figure c.…”

“…21,26 The EDAX spectrum in Figure 2d 13 Likewise, the binding energies of C 1s spectra of FO signify the increase in carbon content in NC following the addition of PRGO. 27 The high-resolution Fe 2p spectra and associated convoluted peaks for FRGO are displayed in Figure 3c. The spectra reflect two distinct peaks corresponding to Fe 2P 1/2 with a binding energy of 709.51 eV and Fe 2P 3/2 with 723.80 eV.…”

Reinforcing effect of Fe2O3 nanoparticle‐decorated graphene oxide on flexural and wear behaviors of epoxy composites

“…After decorating the GO with Fe 2 O 3 , the intensity of carboxyl and hydroxyl bands at 1719 and 3361 cm −1 are decreased (Figure 2b). The peaks at 563 and 440 cm −1 are assigned to the FeO stretching mode, verifying the presence of Fe 2 O 3 39 . GO possesses a variety of polar functional groups such as hydroxyl (OH), carboxylic acid (COOH), and epoxy (COC).…”

“…The peaks at 563 and 440 cm À1 are assigned to the Fe O stretching mode, verifying the presence of Fe 2 O 3 . 39 GO possesses a variety of polar functional groups such as hydroxyl ( OH), carboxylic acid ( COOH), and epoxy ( COC ). The proposed mechanism for formation of the Fe 2 O 3 @GO hybrid involves the adsorption of iron ions (Fe 3+ ) onto the GO surface, and the subsequent nucleation and growth of Fe To illustrate the nano-Fe 2 O 3 distribution onto the GO surface, the element-distribution analysis was conducted, and the results can be seen in Figure 3.…”

Iron oxide/graphene oxide nanocomposite synthesis using atmospheric cold plasma

“…32 and 33) and a peak at 545 cm −1 that can be ascribed to Fe-O stretching mode. 34 To get an insight of the reactive species appearing in the plasma post-discharge the OES analyses were performed. Indeed, by comparing the spectra (Fig.…”