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Title: Facile synthesis of pompon-like ZnO-Ag nanocomposites and their enhanced photocatalytic performance

Graphical abstract: - Highlights: • Pompon-like ZnO-Ag was prepared via heterothermal and photodeposition method. • Pompon-like ZnO-Ag is a excellent photocatalyst for degradation of azo dyes. • The photocatalytic and wetting properties were studied upon UV irradiation. • The discoloring efficiency of ZnO-Ag heterostructure toward to azo dyes is 99.1%. - Abstract: A series of pompon-like ZnO-Ag nanocomposites were prepared by hydrothermal method and photochemical deposition technique. Several characterizations indicated the successful deposition of Ag nanoparticles on ZnO. As a whole, the as-prepared composites present pompon-like nanostructures with a diameter of ∼10 μm. In detail, the nanostructural, chemical and optical properties were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), infrared spectroscopy (IR), ultra-visible spectra (UV). The photocatalytic degradation experiments under UV irradiation using Methyl Orange (MO) as a model dye were executed here. The relative results demonstrated that the pompon-like ZnO-Ag nanocomposite with a suitable content of Ag nanoparticles (about 4.82 wt%) has the highest photochemical activity, and the removal ratio of MO was 99.1% after 0.5 h adsorption and subsequent 2 h photodegradation processes. The excellent photocatalytic performance was attributed to the high surface areas of ZnO nanostructure and effectively separation of photo-generatedmore » charge on flower-like ZnO by employing Ag nanoparticles as a conductor.« less
Authors:
;  [1] ;  [2] ;  [1] ;  [3] ;  [1] ;  [1]
  1. College of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan 430081 (China)
  2. College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109 (China)
  3. College of Information Science and Engineering, Ningbo University, Ningbo 315211 (China)
Publication Date:
OSTI Identifier:
22285161
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 48; Journal Issue: 10; Other Information: Copyright (c) 2013 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:
36 MATERIALS SCIENCE; COMPOSITE MATERIALS; HYDROTHERMAL SYNTHESIS; METALS; METHYL ORANGE; NANOSTRUCTURES; OPTICAL PROPERTIES; PHOTOCATALYSIS; SCANNING ELECTRON MICROSCOPY; SEMICONDUCTOR MATERIALS; SURFACE AREA; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION; ZINC OXIDES