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Title: Fabrication, characterization and photocatalytic properties of Ag/AgI/BiOI heteronanostructures supported on rectorite via a cation-exchange method

Highlights: • Ag/AgI/BiOI-rectorite was prepared by twice cation-exchange process. • Ag/AgI/BiOI-rectorite photocatalyst possessed SPR and adsorption capacity. • Ag/AgI/BiOI-rectorite exhibited highly photocatalytic activity. • Trapped holes and ·O{sub 2}{sup −} were formed active species in the photocatalytic system. - Abstract: In this work, a new plasmonic photocatalyst Ag/AgI/BiOI-rectorite was prepared via a cation exchange process. The photocatalyst had been characterized by X-ray powder diffraction (XRD), Raman spectra, nitrogen sorption (BET), field-emission scanning electron microscope (FE-SEM), X-ray photoelectron spectroscopy (XPS) and UV–vis diffuse reflectance spectroscopy (DRS). The photocatalytic activity, which was evaluated by degradation of rhodamine B (RhB) and bisphenol A (BPA) under visible light irradiation, was enhanced significantly by loading Ag/AgI/BiOI nanoparticles onto rectorite. The photogenerated holes and superoxide radical (·O{sub 2}{sup −}) were both formed as active species for the photocatalytic reactions under visible light irradiation. The existence of metallic Ag particles, which possess the surface plasmon resonance effect, acted as an indispensable role in the photocatalytic reaction.
Authors:
 [1] ;  [1] ;  [2] ;  [3] ; ; ;  [4] ; ;  [1] ;  [1] ;  [2]
  1. School of Chemistry and Environment, South China Normal University, Guangzhou 510006, Guangdong (China)
  2. (China)
  3. Shenzhen Center for Disease Control and Prevention, Shenzhen 518055 (China)
  4. Institute of Engineering Technology of Guangdong Province, Key Laboratory of Water Environmental Pollution Control of Guangdong Province, Guangzhou 510440 (China)
Publication Date:
OSTI Identifier:
22475720
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 64; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; ADSORPTION; BISMUTH COMPOUNDS; CAPACITY; FIELD EMISSION; IODINE COMPOUNDS; ION EXCHANGE; IRRADIATION; NANOPARTICLES; NITROGEN; OXYGEN COMPOUNDS; PHOTOCATALYSIS; RAMAN SPECTRA; RESONANCE; SCANNING ELECTRON MICROSCOPY; SEMICONDUCTOR MATERIALS; SILVER; SILVER IODIDES; SURFACE PROPERTIES; X-RAY DIFFRACTION; X-RAY PHOTOELECTRON SPECTROSCOPY