Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/5152
Título: Influence of the Sodium/Proton replacement on the structural, morphological and photocatalytic properties of titanate nanotubes
Autor: Bem, V.
Neves, M. C.
Nunes, M. R.
Silvestre, A. J.
Monteiro, O. C.
Palavras-chave: Titanate Nanotubes
Sodium/Proton Exchange
Band Gap Energy
Photocatalysis
Rhodamine 6G
Data: 15-Mar-2012
Editora: Elsevier Science SA
Citação: BEM, V.; [et al] – Influence of the Sodium/Proton replacement on the structural, morphological and photocatalytic properties of titanate nanotubes. Journal of Photochemistry and Photobiology A: Chemistry. ISSN: 1010-6030. Vol. 232, nr. 10 (2012), pp. 50-56
Resumo: Titanate nanotubes (TNT) with different sodium contents have been synthesised using a hydrothermal approach and a swift and highly controllable post-washing processes. The influence of the sodium/proton replacement on the structural and morphological characteristics of the prepared materials was analysed. Different optical behaviour was observed depending on the Na+/H+ samples’ content. A band gap energy of 3.27±0.03 eV was estimated for the material with higher sodium content while a value of 2.81±0.02 eV was inferred for the most protonated material, which therefore exhibits an absorption edge in the near visible region. The point of zero charge of the materials was determined and the influence of the sodium content on the adsorption of both cationic and anionic organic dyes was studied. The photocatalytic performance of the TNT samples was evaluated in the rhodamine 6G degradation process. Best photodegradation results were obtained when using the most protonated material as catalyst, although this material has shown the lowest R6G adsorption capability.
Peer review: yes
URI: http://hdl.handle.net/10400.21/5152
DOI: 10.1016/j.jphotochem.2012.02.002
ISSN: 1010-6030
Aparece nas colecções:ISEL - Física - Artigos



FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpace
Formato BibTex MendeleyEndnote Degois 

Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.