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Graphene quantum dots prepared from chemical exfoliation of multiwall carbon nanotubes: An efficient photocatalyst promoter

Paper ID Volume ID Publish Year Pages File Format Full-Text
49266 46730 2016 6 PDF Available
Title
Graphene quantum dots prepared from chemical exfoliation of multiwall carbon nanotubes: An efficient photocatalyst promoter
Abstract

•Grapheme quantum dots with strong electronic property have been prepared by chemical exfoliation.•GQDs/P25 nanocomposites as an efficient photocatalyst promoter have been prepared.•GQDs/P25 nanocomposites show much higher photocatalytic activity than P25 under visible-light irradiation.•GQDs play the crucial roles in GQDs/P25 nanocomposites for visible-light photocatalysis.

We report here a facile preparation of graphene quantum dots (GQDs) by chemical exfoliation of multiwall carbon nanotubes (MWCNTs) using a modified hummers' method. The resultant GQD samples possess strong electronic property, revealing great potential for photocatalyst design. As an efficient promoter, GQDs/P25 nanocomposites have been successfully prepared by simple wet impregnation and subsequent thermal annealing at 200 °C. In the tests of photocatalytic degradation of organic dyes under visible-light irradiation, the GQDs promoted P25 samples which shows much higher photocatalytic activity compared to the pure P25, indicating the crucial roles of GQDs.

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Keywords
Graphene quantum dots; Multiwall carbon nanotubes; Exfoliation; Visible-light photocatalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 74, 10 January 2016, Pages 104–109
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
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Price after discount Only $4.95
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Full-text PDF Download
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