Per citar aquest document: http://ddd.uab.cat/record/119300
Mesoporous titania powders: the role of precursors, ligand addition and calcination rate on their morphology, crystalline structure and photocatalytic activity
Masolo, Elisabetta (Università degli Studi di Sassari. Dipartimento di Chimica e Farmacia)
Meloni, Manuela (Università degli Studi di Sassari. Dipartimento di Chimica e Farmacia)
Garroni, Sebastiano (Università degli Studi di Sassari. Dipartimento di Chimica e Farmacia)
Mulas, Gabriele (Università degli Studi di Sassari. Dipartimento di Chimica e Farmacia)
Enzo, Stefano (Università degli Studi di Sassari. Dipartimento di Chimica e Farmacia)
Baró, M. D. (Universitat Autònoma de Barcelona. Departament de Física)
Rossinyol Casals, Emma (Universitat Autònoma de Barcelona. Servei de Microscòpia)
Rzeszutek, Agnieszka (Helmholtz-Zentrum Geesthacht. Das Institut für Werkstoffforschung)
Herrmann-Geppert, Iris (Helmholtz-Zentrum Geesthacht. Das Institut für Werkstoffforschung)
Maria Pilo, Maria (Università degli Studi di Sassari. Dipartimento di Chimica e Farmacia)

Data: 2014
Resum: We evaluate the influence of the use of different titania precursors, calcination rate, and ligand addition on the morphology, texture and phase content of synthesized mesoporous titania samples, parameters which, in turn, can play a key role in titania photocatalytic performances. The powders, obtained through the evaporation-induced self-assembly method, are characterized by means of ex situ X-Ray Powder Diffraction (XRPD) measurements, N2 physisorption isotherms and transmission electron microscopy. The precursors are selected basing on two different approaches: the acid-base pair, using TiCl4 and Ti(OBu)4, and a more classic route with Ti(OiPr)4 and HCl. For both precursors, different specimens were prepared by resorting to different calcination rates and with and without the addition of acetylacetone, that creates coordinated species with lower hydrolysis rates, and with different calcination rates. Each sample was employed as photoanode and tested in the water splitting reaction by recording I-V curves and comparing the results with commercial P25 powders. The complex data framework suggests that a narrow pore size distribution, due to the use of acetylacetone, plays a major role in the photoactivity, leading to a current density value higher than that of P25.
Drets: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. Creative Commons
Llengua: Anglès
Document: article ; recerca ; publishedVersion
Matèria: Titania ; Titani ; EISA method ; Evaporation-induced self-assembly method ; Mètode EISA ; Powders ; Pols ; Photocatalysis ; Fotocatàlisi ; Water splitting ; Dissociació de l'aigua
Publicat a: Nanomaterials, Vol. 4, no. 3 (2014) , p. 583-598, ISSN 2079-4991

DOI: 10.3390/nano4030583


16 p, 3.3 MB

El registre apareix a les col·leccions:
Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > Grup de nanoenginyeria de materials, nanomagnetisme i nanomecànica (Gnm3)
Articles > Articles de recerca
Articles > Articles publicats

 Registre creat el 2014-07-31, darrera modificació el 2016-09-05



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