Enhanced photocatalytic degradation of 4-nitrophenol using polyacrylamide assisted Ce-doped YMnO_(3) nanoparticles

This research article mainly reports on the precise structural,optical,and photocatalytic properties of cerium(Ce)-substituted yttrium manganite(YMnO_(3))nanoparticles synthesized by the polyacrylamide gel method.The characteristics of YMnO_(3)were investigated by the substitution of Ce into the Y site at various molar percentages.The Raman and X-ray diffraction(XRD)analyses confirmed the pure phase of hexagonal YMnO_(3),supported by the Rietveld refinement.The microstructural studies indicate inhomogeneous and irregular particle distribution.The X-ray photoelectron spectroscopy(XPS)results show the presence of two ionic states of Mn and Ce along with Y^(3+)state and oxygen vacancies.Extensive optical exploration using photoluminescence(PL)spectroscopy and UV-Vis-NIR analysis indicates that the intensity of absorption peak increases in the visible region,while the bandgap decreases from 1.42 to1.30 eV with the Ce ion doping(5 mol%-15 mol%).Photocatalytic properties of the polycrystalline nanoparticles were investigated by degradation of the pollutant 4-nitrophenol.The process of amplified photocatalysis process was elucidated by the lowered bandgap and rate of charge carrier recombination.It can be conjugated from this study that the synthesized nanoparticles may be employed as highly efficient(92.8%)visible light-triggered photocatalysts in a variety of real-world applications.

Hexagonal yttrium manganite:A review on synthesis methods,physical properties and applications

Hexagonal rare-earth manganites have attracted considerable interest due to their complex multiferroic properties,and they possess a spontaneous electric polarization and may be utilized in various technological applications ranging from solar cells to non-volatile memories and light polarizers.The narrow bandgap of hexagonal rare-earth manganite-based compounds can perform remarkable optical anisotropy properties,which make these very efficient photovoltaic materials in parallel with the widely used TiO_(2)-based materials.Substantial enlargement of the traditional field of hexagonal rare-earth manganite photocatalysis also arose in the last decade.This article imparts an extensive review of the rational synthesis,optical properties,structural characterization,and applications of hexagonal rare-earth manganite.Fundamental properties of hexagonal rare-earth perovskite manganite are also emphasized,and a range of unique applications in photocatalysis and photovoltaics are discussed.Eventually,we wind up this review with some linear perspectives and future research in this area.