Plasmonic Ag/Ag2O nanoparticles anchored needle-like Bi2O3 as an efficient visible-light-driven nanocomposite photocatalyst

Autor: Sasan Rabieh, Mozhgan Bagheri, Ziba Mohammadian Fard, Hassan Zavvar Mousavi
Rok vydání: 2018
Předmět:
Zdroj: Materials Research Bulletin. 101:311-318
ISSN: 0025-5408
Popis: In this study, a thermal-assisted precipitation method was applied for the uniform deposition of plasmonic Ag/Ag 2 O nanoparticles on the surface of needle-like Bi 2 O 3 to synthesis Ag/Ag 2 O@Bi 2 O 3 nanocomposite. The synthesized nanocomposite was characterized by different techniques including UV–vis spectrophotometry, X-ray diffraction (XRD), scanning electronic microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray mapping, and photoluminescence (PL). The visible-light-driven photocatalytic activities of Ag 2 O@Bi 2 O 3 and Ag/Ag 2 O@Bi 2 O 3 were evaluated on photo-degradation of Reactive Black 5 (RB 5) dye as model pollutant. The effect of process variables including the initial dye concentration, reaction time, and pH on the photo-degradation of RB 5 was studied by Central Composite Design (CCD) methodology. It was found that the photo-degradation rate of Ag/Ag 2 O@Bi 2 O 3 was higher than that of the Ag 2 O@Bi 2 O 3 and Bi 2 O 3 . The highly efficient photocatalytic activity of Ag/Ag 2 O@Bi 2 O 3 nanocomposite is mainly ascribed to enhancing photogenerated electron-hole separation and the surface plasmon resonance (SPR) influence of silver-based nanoparticles.
Databáze: OpenAIRE
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