Enhanced visible-light activity of titania via confinement inside carbon nanotubes
KAUST DepartmentExtreme Computing Research Center
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Advanced Membranes and Porous Materials Research Center
Physical Sciences and Engineering (PSE) Division
Imaging and Characterization Core Lab
KAUST Catalysis Center (KCC)
Chemical Science Program
Biological and Environmental Sciences and Engineering (BESE) Division
Advanced Nanofabrication, Imaging and Characterization Core Lab
Materials Science and Engineering Program
Chemical and Biological Engineering Program
Catalysis for Energy Conversion (CatEC)
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AbstractTitania confined inside carbon nanotubes (CNTs) was synthesized using a restrained hydrolysis method. Raman spectra and magnetic measurements using a SQUID magnetometer suggested the formation of remarkable oxygen vacancies over the encapsulated TiO 2 in comparison with nanoparticles dispersed on the outer surface of CNTs, extending the photoresponse of TiO 2 from the UV to the visible-light region. The CNT-confined TiO 2 exhibited improved visible-light activity in the degradation of methylene blue (MB) relative to the outside titania and commercial P25, which is attributed to the modification of the electronic structure of TiO 2 induced by the unique confinement inside CNTs. These results provide further insight into the effect of confinement within CNTs, and the composites are expected to be promising for applications in visible-light photocatalysis. © 2011 American Chemical Society.
SponsorsWe thank Dr. Y. Yang, Q. Wang, and X. Liu from King Abdullah University of Science and Technology (KAUST) for their help with Raman spectroscopy, TEM, and drawing, respectively. We also acknowledge the faculty distribution fund of KAUST.
PublisherAmerican Chemical Society (ACS)
CollectionsArticles; Advanced Membranes and Porous Materials Research Center; Advanced Nanofabrication, Imaging and Characterization Core Lab; Physical Sciences and Engineering (PSE) Division; Extreme Computing Research Center; Chemical Science Program; Chemical and Biological Engineering Program; Materials Science and Engineering Program; KAUST Catalysis Center (KCC); Biological and Environmental Sciences and Engineering (BESE) Division; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
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