Documents disponibles écrits par cet auteur

Efficient light scattering from one-pot solvothermally derived TiO2 nanospindles / Jun Jiang in Industrial & engineering chemistry research, Vol. 50 N° 15 (Août 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 15 (Août 2011) . - pp. 9003–9008 Titre : Efficient light scattering from one-pot solvothermally derived TiO2 nanospindles Type de document : texte imprimé Auteurs : Jun Jiang, Auteur ; Feng Gu, Auteur ; Xiang Ren, Auteur Année de publication : 2011 Article en page(s) : pp. 9003–9008 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Titanium  oxide  Light  scattering Résumé : one-pot solvothermal approach has been developed for the synthesis of single-crystal anatase TiO2 nanospindles. The introduction of adscititious water in nonaqueous reaction mixture is critical for the spindle formation by allowing for a slow growth rate of TiO2 to facilitate the shape control of TiO2 nanospindles. Arising from the prominent light scattering effect, the fabricated dye sensitized solar cells with the TiO2 nanospindles as light scattering layer show a 27% increment of energy conversion efficiency compared to that of P25 single layer film. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24395846 [article] Efficient light scattering from one-pot solvothermally derived TiO2 nanospindles [texte imprimé] / Jun Jiang, Auteur ; Feng Gu, Auteur ; Xiang Ren, Auteur . - 2011 . - pp. 9003–9008. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 15 (Août 2011) . - pp. 9003–9008 Mots-clés : Titanium  oxide  Light  scattering Résumé : one-pot solvothermal approach has been developed for the synthesis of single-crystal anatase TiO2 nanospindles. The introduction of adscititious water in nonaqueous reaction mixture is critical for the spindle formation by allowing for a slow growth rate of TiO2 to facilitate the shape control of TiO2 nanospindles. Arising from the prominent light scattering effect, the fabricated dye sensitized solar cells with the TiO2 nanospindles as light scattering layer show a 27% increment of energy conversion efficiency compared to that of P25 single layer film. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24395846

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

Morphological evolution from SnO2 quantum dots to quantum chains inside channels of mesoporous spheres / Feng Gu in Industrial & engineering chemistry research, Vol. 50 N° 22 (Novembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 22 (Novembre 2011) . - pp. 12542-12547 Titre : Morphological evolution from SnO2 quantum dots to quantum chains inside channels of mesoporous spheres Type de document : texte imprimé Auteurs : Feng Gu, Auteur ; Xiang Ren, Auteur ; Zhang, Jian, Auteur Année de publication : 2012 Article en page(s) : pp. 12542-12547 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Morphological  quantum  Mesoporous Résumé : Morphological evolution from SnO2 quantum dots (QDs) to quantum chains (QCs) confined in channels of mesoporous silica (MS) has been studied systematically in this work by varying the nuclei quantity deposited on the channels’ inner surface under hydrothermal conditions. Decreasing the MS amounts could influence the nuclei quantity and the subsequent crystal growth as well as the assembly process to form QCs by oriented attachment inside the channels. It is interesting to find that the evolution of SnO2 QDs→QCs systems would induce the variation of strain type tolerated, simultaneously, from tensile to compressive strain, and also exhibit morphology-dependent photoluminescence properties. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie201152e [article] Morphological evolution from SnO2 quantum dots to quantum chains inside channels of mesoporous spheres [texte imprimé] / Feng Gu, Auteur ; Xiang Ren, Auteur ; Zhang, Jian, Auteur . - 2012 . - pp. 12542-12547. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 22 (Novembre 2011) . - pp. 12542-12547 Mots-clés : Morphological  quantum  Mesoporous Résumé : Morphological evolution from SnO2 quantum dots (QDs) to quantum chains (QCs) confined in channels of mesoporous silica (MS) has been studied systematically in this work by varying the nuclei quantity deposited on the channels’ inner surface under hydrothermal conditions. Decreasing the MS amounts could influence the nuclei quantity and the subsequent crystal growth as well as the assembly process to form QCs by oriented attachment inside the channels. It is interesting to find that the evolution of SnO2 QDs→QCs systems would induce the variation of strain type tolerated, simultaneously, from tensile to compressive strain, and also exhibit morphology-dependent photoluminescence properties. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie201152e

Tin oxide nanowires synthesized via flat flame deposition / Jie Liu in Industrial & engineering chemistry research, Vol. 50 N° 9 (Mai 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 9 (Mai 2011) . - pp. 5584-5588 Titre : Tin oxide nanowires synthesized via flat flame deposition : structures and formation mechanism Type de document : texte imprimé Auteurs : Jie Liu, Auteur ; Yanjie Hu, Auteur ; Feng Gu, Auteur Année de publication : 2011 Article en page(s) : pp. 5584-5588 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Formation  mechanism  Flame Résumé : Premixed atmospheric flat flame deposition is a large-scale composite fabrication method that combined the advantages of flame synthesis and thermal evaporation. The technology has been successfully developed to sythesize SnO2 nanowires. The results showed that the as-prepared SnO2 nanowires with special tips are uniform single crystals, growing along [001] direction. Meanwhile, the growth mechanism of the present novel structure, which is a combination of both a vapor-solid ( VS) growth mechanism and a particle formation mechanism in a flame without any catalyst, is also proposed, Furthermore, the optical property is investigated by photoluminescence (PL) spectroscopy, indicating that such SnO2 nanowires exhibit a much stronger emission peak at 620 nm. More importantly, this approach also provides a new pathway for sequentially engineering one-dimensional nanomaterials. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24128681 [article] Tin oxide nanowires synthesized via flat flame deposition : structures and formation mechanism [texte imprimé] / Jie Liu, Auteur ; Yanjie Hu, Auteur ; Feng Gu, Auteur . - 2011 . - pp. 5584-5588. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 9 (Mai 2011) . - pp. 5584-5588 Mots-clés : Formation  mechanism  Flame Résumé : Premixed atmospheric flat flame deposition is a large-scale composite fabrication method that combined the advantages of flame synthesis and thermal evaporation. The technology has been successfully developed to sythesize SnO2 nanowires. The results showed that the as-prepared SnO2 nanowires with special tips are uniform single crystals, growing along [001] direction. Meanwhile, the growth mechanism of the present novel structure, which is a combination of both a vapor-solid ( VS) growth mechanism and a particle formation mechanism in a flame without any catalyst, is also proposed, Furthermore, the optical property is investigated by photoluminescence (PL) spectroscopy, indicating that such SnO2 nanowires exhibit a much stronger emission peak at 620 nm. More importantly, this approach also provides a new pathway for sequentially engineering one-dimensional nanomaterials. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24128681