Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 178, Issue -, Pages 91-99Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2014.10.030
Keywords
Carbon nanotube; Titanium dioxide; Visible light photocatalysis; Heterostructures; Shape control
Funding
- EC [310177, CP-IP 229036-2]
- Apulia Region, Network of Laboratories for Scientific Research (Italy)
- Spanish Ministerio de Economia y Competitividad [CTQ2011-23167]
- FIRB project Rete integrata per la Nano Medicina (RINAME) [RBAP114AMK_006]
- ICREA Funding Source: Custom
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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. (C) 2014 Elsevier B.V. All rights reserved.
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