Document Detail


Band gap engineering of double-cation-impurity-doped anatase-titania for visible-light photocatalysts: a hybrid density functional theory approach.
MedLine Citation:
PMID:  21701732     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
In this study, we have used cation-passivated codoping of Nb with Ga/In and also of W with Zn/Cd to modulate the band structure of anatase-TiO(2) to extend absorption to longer visible-light wavelengths. We adopted generalized Kohn-Sham theory with the Heyd-Scuseria-Ernzerhof (HSE06) hybrid functional for exchange and correlation. It has been found that (W, Cd)-doped TiO(2) should be a strong candidate for visible-light photocatalyst materials owing to the largest extent of band gap narrowing and the formation of continuum band, without movement of the valence band. It is argued that this design principle for band-edge modification can also be applied to other wide-band-gap semiconductors.
Authors:
Run Long; Niall J English
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-6-24
Journal Detail:
Title:  Physical chemistry chemical physics : PCCP     Volume:  -     ISSN:  1463-9084     ISO Abbreviation:  -     Publication Date:  2011 Jun 
Date Detail:
Created Date:  2011-6-24     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100888160     Medline TA:  Phys Chem Chem Phys     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
The SEC Strategic Research Cluster and the Centre for Synthesis and Chemical Biology, School of Chemical and Bioprocess Engineering, University College Dublin, Belfield, Dublin 4, Ireland. run.long@ucd.ie niall.english@ucd.ie.
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