Synthesis of hematite (α-Fe₂O₃) nanoparticles by a liquid-phase microplasma-assisted electrochemical process for photocatalytic activity

Abstract

Dye contamination is becoming a more significant environmental challenge with the development of the textile industry. Scientists from all over the world are working hard to create new, more efficient ways to reduce environmental pollution through environmentally friendly synthesis techniques. In this regard, hematite (α-Fe2O3) nanoparticles have been synthesized by the novel, quick, cheap, and environmentally safe microplasma technique for the photodegradation of rhodamine-B under direct sunlight. Thus, the synthesized α-Fe2O3 nanoparticles were characterized by various characterization techniques such as X-Ray diffraction (XRD), scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR), and ultraviolet-visible spectroscopy (UV-Vis spectroscopy). The structural and optical properties were found to vary with changing precursor concentrations. We measured the photocatalytic decolorization efficiency of synthesized hematite (α-Fe2O3) nanoparticles for rhodamine-B dye under direct sunlight. It was found that α-Fe2O3 nanoparticles exhibited a decolorization capability with 73.75% decolorization of the dye at the rate of 0.04305 g.mg-1.min-1 after 100 minutes of irradiation, exhibiting excellent performance to remove organic contaminants from wastewater.

ZnO/ZIF-8 nanocomposite for orange G dye degradation: synthesis, characterization, photocatalytic activity, and mechanism

“…When the nanocomposite is irradiated with xenon lamp irradiation, the electrons of ZnO and ZIF-8 could be excited from their respective valence band (VB) to conduction band (CB), results in the generation of holes in the VB. Due to the band positions, the electrons from the CB of ZIF-8 could transfer to the CB of ZnO [69][70][71]. Similarly, the holes from VB of ZnO get transferred to VB of ZIF-8, which promoted the separation of photogenerated charge carriers and improved the photocatalytic degradation efficiency.…”

Improved photocatalytic and free radical scavenging studies of synthesized polymer PVP/Azadirachta indica leave extract-mediated Ni-Zn doped hematite nanoparticles

“…A. indica extract proved a suitable and efficient material for the synthesis of highly stabilised HNPs, according to HR-TEM examinations. The surfaces of the structures have distinguishable facets that appear to be quite smooth [26].…”