EPR study of trap-centres produced on TiO2 particles during water photolysis
Data(s) |
01/11/1988
|
---|---|
Resumo |
The results of an EPR investigation are presented on the paramagnetic trap-centres produced on hydrothermally prepared TiO2 particles during water photolysis at room temperature under band-gap irradiation. The trapped holes correspond to O− species adjacent to cation vacancies that are formed to compensate the hydroxyl ions in the subsurface layers. The trapped electrons are accounted for as Ti3+ in the conduction band or Ti3+ - adjoining oxygen vacancy to form shallow donor states. Although hole-centres are normally stabler than electron-centres, strongly adsorbed donor molecules reverse the stability. Concentration of hole-centres is increased by the presence of platinum on TiO2 surface and electron-centres are not detected on Pt/TiO2 during water photolysis. |
Formato |
application/pdf |
Identificador |
http://eprints.iisc.ernet.in/21721/1/pdf.pdf Avudaithaia, M and Kutty, TRN (1988) EPR study of trap-centres produced on TiO2 particles during water photolysis. In: Materials Research Bulletin, 23 (11). pp. 1675-1683. |
Publicador |
Elsevier Science |
Relação |
http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TXC-48F68BS-70&_user=512776&_rdoc=1&_fmt=&_orig=search&_sort=d&_docanchor=&view=c&_acct=C000025298&_version=1&_urlVersion=0&_userid=512776&md5=190a09e00435938510743f43018946f0 http://eprints.iisc.ernet.in/21721/ |
Palavras-Chave | #Inorganic & Physical Chemistry |
Tipo |
Journal Article PeerReviewed |