IMN

Biblio. IMN

Référence en vue solo

Alves, W., Ribeiro, A. O., Pinheiro, M. V. B., Krarnbrock, K., El Haber, F., Froyer, G., Chauvet, O., Ando, R. A., Souza, F. L. & Alves, W. A. (2011) Quenching of Photoactivity in Phthalocyanine Copper(II)-Titanate Nanotube Hybrid Systems. J. Phys. Chem. C, 115 12082–12089. 
Added by: Laurent Cournède (2016-03-10 21:32:20)
Type de référence: Article
DOI: 10.1021/jp202101r
Numéro d'identification (ISBN etc.): 1932-7447
Clé BibTeX: Alves2011
Voir tous les détails bibliographiques
Catégories: PMN
Mots-clés: doped tio2 nanotubes, electronic-structure, hydroxyl, nanoparticles, one-dimensional nanostructures, photocatalytic activity, ray photoelectron-spectroscopy, superoxide, titanate nanotubes, visible-light
Créateurs: Alves, Alves, Ando, Chauvet, El Haber, Froyer, Krarnbrock, Pinheiro, Ribeiro, Souza
Collection: J. Phys. Chem. C
Consultations : 1/1111
Indice de consultation : 7%
Indice de popularité : 1.75%
Résumé     
Titanate nanotubes (TiNTs) were obtained by hydrothermal treatment of anatase powder in aqueous NaOH solution and then modified with 2,9,16,23-tertracarboxyl phthalocyanine copper(H) (CuPc). This hybrid organic inorganic nanoscopic system was characterized by X-ray diffraction, microscopy, and spectroscopy. Transmission electron microscopy (TEM) images of pure and modified TiNTs revealed multiwall structures with an average outer diameter of 9 nm and a length of several hundred nanometers. The tubular morphology of the TiNTs was covered with CuPc-film. The amount of CuPc adsorbed onto the TiNTs was quantified by electron paramagnetic resonance (EPR). Using the same technique and spin-trapping methodology, the photogeneration of reactive oxygen species (ROS) from the TiNTs was systematically investigated. A drastic quenching of photoactivity was observed in the CuPc/TiNT hybrid system. Electron transfer from excited CuPc states to the TiNT conduction band followed by electron recombination may be the cause of this quenching.
Added by: Laurent Cournède  
wikindx 4.2.2 ©2014 | Références totales : 2830 | Requêtes métadonnées : 63 | Exécution de script : 0.12504 secs | Style : Harvard | Bibliographie : Bibliographie WIKINDX globale