FeO@C Nanoparticles Synthesized by In Situ Solid-Phase Method for Removal of Methylene Blue.

FeO@C nanoparticles were prepared by an in situ, solid-phase reaction, without any precursor, using FeSO, FeS, and PVP K30 as raw materials. The nanoparticles were utilized to decolorize high concentrations methylene blue (MB). The results indicated that the maximum adsorption capacity of the Fe3O4@C nanoparticles was 18.

Heterogeneous activation of persulfate by ZnCo Fe O loaded on rice hull carbon for degrading bisphenol A.

A new low-cost composite of ZnCo Fe O loaded on rice hull carbon (ZnCo Fe O-RHC) was synthesized waste ferrous sulfate (the industrial waste produced in the process of producing titanium dioxide) and rice hull as raw materials, which was applied for the degradation of bisphenol A (BPA) by heterogeneous activated peroxodisulfate (PS). A series of characterizations including XRD, SEM, FTIR, and BET analysis were carried out to analyze the structure and morphology of the materials. It is confirmed that the ZnCo Fe O-RHC composites show better catalytic activity and performance than other control samples, which can be attributed to the synergistic effect of Fe and Co, ZnCo Fe O and RHC based on these analyses.

A low-cost solvent-free method to synthesize α-FeO nanoparticles with applications to degrade methyl orange in photo-fenton system.

Hematite nanoparticles (α-FeO NPs) were successfully synthesized by a low-cost solvent-free reaction using Ferrous sulfate waste (FeSO·7HO) and pyrite (FeS) as raw materials and employed for the decolorization of Methyl Orange by the photo-Fenton system. The properties of α-FeO NPs before and after photo-Fenton reaction were characterized by X-ray powder diffraction (XRD), Field emission scanning electron microscopy (FESEM), Fourier transform infrared (FT-IR) spectrum and X-ray photoelectron spectroscopy (XPS), and the optical properties of α-FeO NPs were analyzed by UV-vis diffuse reflectance spectra (UV-vis DRS) and Photoluminescence (PL) spectra. The analytic results showed that the as-formed samples having an average diameter of ~50 nm exhibit pure phase hematite with sphere structure.