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Direct growth of shape controlled TiO2 nanocrystals onto SWCNTs for highly active photocatalytic materials in the visible

Paper ID Volume ID Publish Year Pages File Format Full-Text
44947 46386 2015 9 PDF Available
Title
Direct growth of shape controlled TiO2 nanocrystals onto SWCNTs for highly active photocatalytic materials in the visible
Abstract

•Anatase TiO2 nanocrystals have been grown directly at the surface of SWCNT.•TiO2 nanocrystal shape can be finely tuned from dot to rod according to reaction conditions.•The obtained SWCNTs/TiO2 heterostructures result dispersible in organic solvents.•Photocatalytic properties have been investigated under UV and Visible irradiation.•SWCNTs/TiO2 demonstrated significant enhancement of photocatalytic activity.

We report a very effective synthetic approach to achieve the in situ growth, directly at the surface of single walled carbon nanotubes, of shape controlled anatase TiO2 nanocrystals, either as nanorods or nanospheres, by simply tuning the ratio between reactants. Remarkably, the obtained SWCNTs/TiO2 heterostructures result dispersible in organic solvents, leading to optically clear dispersions. The photocatalytic activity of the SWCNTs/TiO2 heterostructures, compared with bare TiO2 nanorods or nanospheres demonstrates a significant enhancement. In particular, SWCNTs/TiO2 heterostructures demonstrates an enhancement of reaction rate up to 3 times with respect to the commercially available standard TiO2 powder (TiO2 P25) under UV light and up to 2 times under visible light.

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Keywords
Carbon nanotube; Titanium dioxide; Visible light photocatalysis; Heterostructures; Shape control
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Direct growth of shape controlled TiO2 nanocrystals onto SWCNTs for highly active photocatalytic materials in the visible
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 178, November 2015, Pages 91–99
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
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us