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Title: Self-assembled ZnGa{sub 2}O{sub 4}–RGO nanocomposites and their enhanced adsorption and photocatalytic performance in water treatment

Highlights: • ZnGa{sub 2}O{sub 4}–RGO nanocomposites by a self-assembly approach under facile solvothermal condition. • ZnGa{sub 2}O{sub 4} NPs have a well-controlled size and uniform distribution. • The water treatment process is formed by two successive parts: adsorption and photocatalytic degradation. • The content of RGO sheets is crucial for optimizing the photocatalytic activity with a key value of 5%. - Abstract: ZnGa{sub 2}O{sub 4} nanoparticles (NPs) have been successfully anchored onto reduced graphene oxide (RGO) nanosheets by a self-assembly approach under facile solvothermal condition. The as-synthesized ZnGa{sub 2}O{sub 4}–RGO nanocomposites were investigated by X-ray diffraction (XRD), field emission scanning electron microscope (FESEM) and transmission electron microscope (TEM). The results reveal that ZnGa{sub 2}O{sub 4} NPs with a well-controlled size and uniform distribution were successfully assembled onto RGO sheets. Moreover, both methylene blue (MB) and rhodamine B (RhB) were employed as model pollutants to evaluate the ability of as-prepared ZnGa{sub 2}O{sub 4}–RGO nanocomposites for wastewater treatment. The content of RGO sheets was found to be crucial for optimizing the photocatalytic activity of various nanocomposites with a key value of 5% beyond which the adsorption ability of ZnGa{sub 2}O{sub 4}–RGO nanocomposites for dyes dominates the process of water treatment.
Authors:
 [1] ;  [2] ; ; ; ; ; ;  [3] ;  [1] ;  [2] ;  [3] ;  [1] ;  [2]
  1. State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876 (China)
  2. (China)
  3. School of Science, Beijing University of Posts and Telecommunications, Beijing 100876 (China)
Publication Date:
OSTI Identifier:
22420689
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 60; 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:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; ADSORPTION; FIELD EMISSION; GALLIUM OXIDES; GRAPHENE; METHYLENE BLUE; NANOCOMPOSITES; NANOPARTICLES; NANOSTRUCTURES; OXIDES; PHOTOCATALYSIS; SCANNING ELECTRON MICROSCOPY; TRANSMISSION ELECTRON MICROSCOPY; WASTE WATER; WATER TREATMENT; X-RAY DIFFRACTION; ZINC COMPOUNDS