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Photocatalytic Activity Enhancement in Methylene Blue Degradation by Loading Ag Nanoparticles onto α-Fe2O3

Authors
  • Chomkitichai, W.1
  • Jansanthea, P.1
  • Channei, D.2
  • 1 Department of Chemistry, Faculty of Science and Technology, Uttaradit Rajabhat University, Uttaradit, 53000, Thailand , Uttaradit (Thailand)
  • 2 Department of Chemistry, Faculty of Science, Naresuan University, Phitsanulok, 65000, Thailand , Phitsanulok (Thailand)
Type
Published Article
Journal
Russian Journal of Inorganic Chemistry
Publisher
Pleiades Publishing
Publication Date
Dec 27, 2021
Volume
66
Issue
13
Pages
1995–2003
Identifiers
DOI: 10.1134/S0036023621130027
Source
Springer Nature
Keywords
Disciplines
  • Inorganic Materials and Nanomaterials
License
Yellow

Abstract

AbstractModified alpha iron(III) oxide (α-Fe2O3) used as visible light-driven photocatalysts were successfully synthesized with different ratios of silver nanoparticles (AgNPs) by coupling a hydrothermal method with an impregnation method. The samples were characterized by their physicochemical properties using X-ray powder diffraction, transmission electron microscopy, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, UV-visible diffuse reflectance spectroscopy, Brunauer–Emmett–Teller (BET) specific surface area and photoluminescence spectroscopy (PL). The X-ray powder diffraction results indicated that all the samples were in the rhombohedral (hexagonal) phase of α-Fe2O3. The photocatalytic activities of Ag-loaded α-Fe2O3 were evaluated through the mineralization of methylene blue (MB) under visible light illumination. The α-Fe2O3 photocatalytic results showed that loading with Ag nanoparticles could improve the photocatalytic activities effectively. It was found that 5.0 wt % Ag-loaded α-Fe2O3 was a better photocatalyst than others under the same reaction conditions. Its efficiency was 68.6% at 150 min at a kinetic rate constant (k) of 7.9 × 10−3 min−1.

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