One-step preparation of RGO/Fe3O4–FeVO4 nanocomposites as highly effective photocatalysts under natural sunlight illumination

Abstract

The study used a one-step hydrothermal method to prepare Fe3O4–FeVO4 and xRGO/Fe3O4–FeVO4 nanocomposites. XRD, TEM, EDS, XPS, DRS, and PL techniques were used to examine the structurally and morphologically properties of the prepared samples. The XRD results appeared that the Fe3O4–FeVO4 has a triclinic crystal structure. Under hydrothermal treatment, (GO) was effectively reduced to (RGO) as illustrated by XRD and XPS results. UV–Vis analysis revealed that the addition of RGO enhanced the absorption in the visible region and narrowed the band gap energy. The photoactivities of the prepared samples were evaluated by degrading methylene blue (MB), phenol and brilliant green under sunlight illumination. As indicated by all the nanocomposites, photocatalytic activity was higher than the pure Fe3O4–FeVO4 photocatalyst, and the highest photodegradation efficiency of MB and phenol was shown by the 10%RGO/Fe3O4–FeVO4. In addition, the study examined the mineralization (TOC), photodegradation process, and photocatalytic reaction kinetics of MB and phenol.

Synthesis of Highly Efficient and Recyclable Bimetallic Cox–Fe1–x–MOF for the Synthesis of Xanthan and Removal of Toxic Pb2+ and Cd2+ Ions

“…The FTIR spectra of Fe–MOF and Co x –Fe 1– x –MOF (Figure ) displayed a broad band at ∼3450 cm –1 assigned to the ν­(O–H) of water and/or hydroxyl groups. ,, Also, another band appeared at 2930 cm –1 attributed to the stretching vibrations of C–H. The main characteristic bands appeared at 1662 cm –1 assigned to the stretching vibration of CO (−COOH) while the absorption bands in the range of 1600–700 cm –1 are related to the vibration modes of aromatic rings in the linker. ,− Also, the band that appeared at 1387 cm –1 related to the asymmetric stretching of (C–O) .…”

Synthesis, characterization, electrical, and magnetic properties of polyvinyl alcohol/carboxymethyl cellulose blend doped with nickel ferrites nanoparticles for magneto‐electronic devices

“…54‐0964) 31 . By applying the following Debye–Scherrer formula, the particle mean size (Dhkl) was determined 32 : where D is the particle mean size, β is the full width at half‐maximum of the strongest peak (FWHM), and λ is the wavelength of the target Cu–K α (1.54060 A); D value was found to be 20 nm, corresponding to the (311) plane.…”

“…54-0964). 31 By applying the following Debye-Scherrer formula, the particle mean size (Dhkl) was determined 32 :…”

Enhanced sunlight-driven catalysis for hydrogen generation and dye remediation using synergistic p-Co3O4/n-TiO2 nanocomposites

“…Efforts to secure sustainable energy alternatives, particularly from renewable sources, are paramount to mitigate reliance on nite fossil fuels. [1][2][3][4][5][6][7][8][9][10] Solar energy, as a free and abundant resource, holds promise for hydrogen production through water splitting and remediation of environmental contaminants in wastewater treatment. Semiconductor nanomaterials, especially titanium dioxide (TiO 2 ) with a substantial band gap of 3.2 eV, have emerged as promising photocatalysts due to their low cost, efficient photochemical stability, and non-toxic nature.…”