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RGO–TiO2–ZnO composites: Synthesis, characterization, and application to photocatalysis

Paper ID Volume ID Publish Year Pages File Format Full-Text
39326 45818 2015 6 PDF Available
Title
RGO–TiO2–ZnO composites: Synthesis, characterization, and application to photocatalysis
Abstract

•We fabricated the RGO–TiO2–ZnO nanocomposite via hydrothermal reduction.•The properties of the composite were investigated by FE-SEM, TEM, FTIR, etc.•The photocatalytic activity of the composite was compared with pure ZnO and TiO2–ZnO.•The best photocatalytic performance was shown by RGO–TiO2–ZnO with higher amount of RGO.•The stepwise energy level is the key to the enhanced photocatalytic activity.

Chemical approaches to the reduction of graphene oxide (GO) for large-scale production of reduced graphene oxide (RGO) sheets have become a reality, speeding up the availability of graphene. In this work, an RGO–TiO2–ZnO composite was synthesized through the hydrothermal reduction of GO in a deionized (DI) water solution containing TiO2 and ZnO precursors at 180 °C. Morphological and structural characterizations using several techniques are reported. The photocatalytic activity of the synthesized RGO–TiO2–ZnO composite is approximately 63% at 120 min under 100 W UV irradiation, which is much higher than that of pure ZnO (11%). The enhanced properties are described in terms of increased light absorption intensity and the reduction of electron–hole pair recombination in the composite owing to the stepwise energy level structure in the composite.

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Keywords
Reduced graphene oxide; Hydrothermal; UV irradiation; Photocatalytic; Electron–hole pair
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RGO–TiO2–ZnO composites: Synthesis, characterization, and application to photocatalysis
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 491, 5 February 2015, Pages 52–57
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
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