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Article Dans Une Revue Symmetry Année : 2023

Evaluation of Photocatalytic Activity and Electrochemical Properties of Hematite Nanoparticles

Suresh Sagadevan
  • Fonction : Auteur
Ramesh Poonchi Sivasankaran
  • Fonction : Auteur
J. Anita Lett
  • Fonction : Auteur
Is Fatimah
Getu Kassegn Weldegebrieal
Minh-Vien Le
Tetsuo Soga

Résumé

The symmetric nano morphologies, asymmetric electronic structures, and as well as the heterojunctions of the developed photocatalytic systems perform a vital role in promoting light absorption, separation of electron and hole pairs and charge carrier transport to the surface when exposed to near-infrared (NIR) light. In this present work, we synthesized hematite (α-Fe2O3) nanoparticles (NPs) by a facile hydrothermal method and studied their structural, optical, and photocatalytic properties. Powder X-ray diffraction (XRD) confirmed the rhombohedral phase of the α-Fe2O3 NPs, and Fourier transform infrared spectroscopy (FT-IR) was used to investigate symmetric and asymmetric stretching vibrations of the functional groups on the surface of the catalysts. The optical bandgap energy was estimated to be 2.25 eV using UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS) and scanning electron microscopy (SEM) images indicated sphere like morphology. The oxidation and reduction properties of α-Fe2O3 NPs were analyzed by cyclic voltammetry (CV). The α-Fe2O3 NPs were utilized for the degradation of methylene blue (MB) dye under natural sunlight. The experimental results demonstrate that the degradation efficiency was achieved at 33% in 2 h, and the pseudo-first-order rate constant was calculated to be 0.0033 min−1.

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Chimie
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Dates et versions

hal-04389975 , version 1 (05-06-2024)

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Citer

Suresh Sagadevan, Ramesh Poonchi Sivasankaran, J. Anita Lett, Is Fatimah, Getu Kassegn Weldegebrieal, et al.. Evaluation of Photocatalytic Activity and Electrochemical Properties of Hematite Nanoparticles. Symmetry, 2023, 15 (6), pp.1139. ⟨10.3390/sym15061139⟩. ⟨hal-04389975⟩
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