4.7 Article

Fabrication of novel surface plasmon resonance induced visible light driven iridium decorated SnO2 nanorods for degradation of organic contaminants

Journal

JOURNAL OF ALLOYS AND COMPOUNDS
Volume 763, Issue -, Pages 512-524

Publisher

ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.05.340

Keywords

Ir/SnO2 nanorods; Surface plasmon resonance; Hydrothermal method; Visible light driven photocatalyst

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Novel visible light driven iridium (Ir) nanoparticles decorated SnO2 nanorods photocatalyst were synthesized via facile hydrothermal strategy. The effect of iridium loading on the SnO2 phase, morphology and optical properties of the nanocomposites was investigated by standard spectroscopy and microscopy techniques. Under visible light, Ir/SnO2 (3%) nanocomposite displayed much higher photocatalytic activity and decomposed more than 97% of crystal violet and methylene blue dyes after 60 min irradiation. The photocatalytic activity was highly dependent on the loading content of Ir because of the electron acceptor role played by Ir NPs and thus promoting the separation of electron-hole pairs. The enhanced photocatalytic activity could be due to the efficient electrons transfer from the surface plasmon resonance (SPR) effect of metallic Ir to SnO2 nanorods which can, in turn, extend the lifetime of the charge carriers. Based on the experimental results, a possible degradation mechanism was also elucidated using radical scavengers, which indicates that the center dot OH and O-2 center dot(-) play a crucial role in photodegradation reaction. (C) 2018 Elsevier B.V. All rights reserved.

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