Preparation and characterization of anatase TiO2 nanosheets - based microspheres for dye - sensitized solar cells / Yali Wang in Industrial & engineering chemistry research, Vol. 50 N° 21 (Novembre 2011)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 50 N° 21 (Novembre 2011) . - pp. 11982-11987 Titre : Preparation and characterization of anatase TiO2 nanosheets - based microspheres for dye - sensitized solar cells Type de document : texte imprimé Auteurs : Yali Wang, Auteur ; Weiguang Yang, Auteur ; Weimin Shi, Auteur Année de publication : 2011 Article en page(s) : pp. 11982-11987 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Dyes Microsphere Titanium oxide Preparation Résumé : The one-pot synthesis of hierarchically structured anatase TiO2 nanosheets-based microspheres with controlled sizes is successfully achieved through the hydrolysis of titanium tetrafluoride in polyol medium with heating at 170 °C. Field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), and X-ray photoelectron spectroscopy (XPS) are used to characterize the products. The effect of heat treatment on F- adsorbed on the surface of the nanosheets-based microspheres is investigated. In our work, fluorine ions from TiF4, diethylene glycol (DEG) as a solvent as well as a protective capping agent, and excess acetic acid play important roles in the formation of the dominantly exposed {001} facets and hierarchical structure. Due to the dominant exposure of high surface energy {001} facets, enlarged surface area, and improved light-scattering effect of the anatase TiO2 nanosheets-based microspheres, the dye-sensitized solar cell (DSSC) based on such materials exhibits cell performance superior to that of P25 TiO2. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24697518 [article] Preparation and characterization of anatase TiO2 nanosheets - based microspheres for dye - sensitized solar cells [texte imprimé] / Yali Wang, Auteur ; Weiguang Yang, Auteur ; Weimin Shi, Auteur . - 2011 . - pp. 11982-11987. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 21 (Novembre 2011) . - pp. 11982-11987 Mots-clés : Dyes Microsphere Titanium oxide Preparation Résumé : The one-pot synthesis of hierarchically structured anatase TiO2 nanosheets-based microspheres with controlled sizes is successfully achieved through the hydrolysis of titanium tetrafluoride in polyol medium with heating at 170 °C. Field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), and X-ray photoelectron spectroscopy (XPS) are used to characterize the products. The effect of heat treatment on F- adsorbed on the surface of the nanosheets-based microspheres is investigated. In our work, fluorine ions from TiF4, diethylene glycol (DEG) as a solvent as well as a protective capping agent, and excess acetic acid play important roles in the formation of the dominantly exposed {001} facets and hierarchical structure. Due to the dominant exposure of high surface energy {001} facets, enlarged surface area, and improved light-scattering effect of the anatase TiO2 nanosheets-based microspheres, the dye-sensitized solar cell (DSSC) based on such materials exhibits cell performance superior to that of P25 TiO2. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24697518

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