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Flame synthesis of ball-in-shell structured TiO2 nanospheres / Jie Liu in Industrial & engineering chemistry research, Vol. 48 N°2 (Janvier 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N°2 (Janvier 2009) Titre : Flame synthesis of ball-in-shell structured TiO2 nanospheres Type de document : texte imprimé Auteurs : Jie Liu, Auteur ; Yanjie Hu, Auteur ; Feng Gu, Auteur ; Chunzhong Li, Auteur Année de publication : 2009 Note générale : chemical engeneering Langues : Anglais (eng) Mots-clés : Nanosphereselectron  microscopy Résumé : Ball-in-shell structured TiO2 nanospheres were successfully made by flame synthesis—a single-step, continuous, and scalable process. The morphology and structure were systematically characterized by X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis, transmission electron microscopy, scanning electron microscopy, and N2 sorption. TiO2 nanostructures with good crystalline nature and thermal stability were formed by feeding a titanium tetrachloride and alcohol vapor mixture to a facile diffusion flame. The resultant ball-in-shell spheres were composed of nanocrystallites, with shell thickness and void space width of 30−50 nm and 10−30 nm, respectively. The formation mechanism of ball-in-shell spheres was investigated, depending on the competition between the chemical reaction rate and diffusion rate during the flame process. Furthermore, UV−vis characterization indicates that this structure endows the spheres with higher light absorbance, which may be favorable to design and prepare novel materials with enhanced photocatalytic activities. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800986j [article] Flame synthesis of ball-in-shell structured TiO2 nanospheres [texte imprimé] / Jie Liu, Auteur ; Yanjie Hu, Auteur ; Feng Gu, Auteur ; Chunzhong Li, Auteur . - 2009. chemical engeneering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°2 (Janvier 2009) Mots-clés : Nanosphereselectron  microscopy Résumé : Ball-in-shell structured TiO2 nanospheres were successfully made by flame synthesis—a single-step, continuous, and scalable process. The morphology and structure were systematically characterized by X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis, transmission electron microscopy, scanning electron microscopy, and N2 sorption. TiO2 nanostructures with good crystalline nature and thermal stability were formed by feeding a titanium tetrachloride and alcohol vapor mixture to a facile diffusion flame. The resultant ball-in-shell spheres were composed of nanocrystallites, with shell thickness and void space width of 30−50 nm and 10−30 nm, respectively. The formation mechanism of ball-in-shell spheres was investigated, depending on the competition between the chemical reaction rate and diffusion rate during the flame process. Furthermore, UV−vis characterization indicates that this structure endows the spheres with higher light absorbance, which may be favorable to design and prepare novel materials with enhanced photocatalytic activities. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800986j

Highly efficient dye - sensitized solar cells by using a mesostructured anatase TiO2 electrode with high dye loading capacity / Wei Shao in Industrial & engineering chemistry research, Vol. 49 N° 19 (Octobre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 19 (Octobre 2010) . - pp. 9111–9116 Titre : Highly efficient dye - sensitized solar cells by using a mesostructured anatase TiO2 electrode with high dye loading capacity Type de document : texte imprimé Auteurs : Wei Shao, Auteur ; Feng Gu, Auteur ; Chunzhong Li, Auteur Année de publication : 2010 Article en page(s) : pp. 9111–9116 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Mesostructured  anatase  Electrode Résumé : The growth and assembly of TiO2 nanostructures with enhanced charge transfer and light harvesting have attracted much attention for fabricating highly efficient dye-sensitized solar cells. In this study, we report an environmentally friendly and easy synthetic route for fabrication of mesostructured anatase TiO2 by controlling the hydrolyzing of n-butyl titanate in boric acid solution. The well-defined mesoporous TiO2 aggregates are obtained by the tensorial reaction-limited aggregation probability. The photovoltaic measurements indicate that the mesoporous TiO2 layer enhances the dye loading capacity, the electron transfer efficiency, and the photocurrent of the cell, contributing to the significant improvement of the energy conversion efficiency of the dye-sensitized solar cells. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901692z [article] Highly efficient dye - sensitized solar cells by using a mesostructured anatase TiO2 electrode with high dye loading capacity [texte imprimé] / Wei Shao, Auteur ; Feng Gu, Auteur ; Chunzhong Li, Auteur . - 2010 . - pp. 9111–9116. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 19 (Octobre 2010) . - pp. 9111–9116 Mots-clés : Mesostructured  anatase  Electrode Résumé : The growth and assembly of TiO2 nanostructures with enhanced charge transfer and light harvesting have attracted much attention for fabricating highly efficient dye-sensitized solar cells. In this study, we report an environmentally friendly and easy synthetic route for fabrication of mesostructured anatase TiO2 by controlling the hydrolyzing of n-butyl titanate in boric acid solution. The well-defined mesoporous TiO2 aggregates are obtained by the tensorial reaction-limited aggregation probability. The photovoltaic measurements indicate that the mesoporous TiO2 layer enhances the dye loading capacity, the electron transfer efficiency, and the photocurrent of the cell, contributing to the significant improvement of the energy conversion efficiency of the dye-sensitized solar cells. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901692z