The Experts below are selected from a list of 14610 Experts worldwide ranked by ideXlab platform
Jiabin Liu - One of the best experts on this subject based on the ideXlab platform.
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UV and visible light photocatalytic activity of Au/TiO 2 nanoforests with Anatase/Rutile Phase junctions and controlled Au locations
Scientific reports, 2017Co-Authors: Wei Wen, Xin-yue Qian, Jiabin LiuAbstract:To magnify anatase/Rutile Phase junction effects through appropriate Au decorations, a facile solution-based approach was developed to synthesize Au/TiO2 nanoforests with controlled Au locations. The nanoforests cons®isted of anatase nanowires surrounded by radially grown Rutile branches, on which Au nanoparticles were deposited with preferred locations controlled by simply altering the order of the fabrication step. The Au-decoration increased the photocatalytic activity under the illumination of either UV or visible light, because of the beneficial effects of either electron trapping or localized surface plasmon resonance (LSPR). Gold nanoparticles located preferably at the interface of anatase/Rutile led to a further enhanced photocatalytic activity. The appropriate distributions of Au nanoparticles magnify the beneficial effects arising from the anatase/Rutile Phase junctions when illuminated by UV light. Under the visible light illumination, the LSPR effect followed by the consecutive electron transfer explains the enhanced photocatalysis. This study provides a facile route to control locations of gold nanoparticles in one-dimensional nanostructured arrays of multiple-Phases semiconductors for achieving a further increased photocatalytic activity.
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uv and visible light photocatalytic activity of au tio 2 nanoforests with anatase Rutile Phase junctions and controlled au locations
Scientific Reports, 2017Co-Authors: Wei Wen, Xin-yue Qian, Jiabin LiuAbstract:To magnify anatase/Rutile Phase junction effects through appropriate Au decorations, a facile solution-based approach was developed to synthesize Au/TiO2 nanoforests with controlled Au locations. The nanoforests cons®isted of anatase nanowires surrounded by radially grown Rutile branches, on which Au nanoparticles were deposited with preferred locations controlled by simply altering the order of the fabrication step. The Au-decoration increased the photocatalytic activity under the illumination of either UV or visible light, because of the beneficial effects of either electron trapping or localized surface plasmon resonance (LSPR). Gold nanoparticles located preferably at the interface of anatase/Rutile led to a further enhanced photocatalytic activity. The appropriate distributions of Au nanoparticles magnify the beneficial effects arising from the anatase/Rutile Phase junctions when illuminated by UV light. Under the visible light illumination, the LSPR effect followed by the consecutive electron transfer explains the enhanced photocatalysis. This study provides a facile route to control locations of gold nanoparticles in one-dimensional nanostructured arrays of multiple-Phases semiconductors for achieving a further increased photocatalytic activity.
Yueming Fan - One of the best experts on this subject based on the ideXlab platform.
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the effect of iron ions on the anatase Rutile Phase transformation of titania tio2 in mica titania pigments
Dyes and Pigments, 2012Co-Authors: Qiang Gao, Yueming FanAbstract:Abstract Rutile TiO 2 -coated mica–titania pigments were prepared by hydrolysis of titanium tetrachloride in the presence of Fe 3+ . After calcination at 700 °C for 2 h, TiO 2 nanolayers in Rutile Phase were formed on the mica surfaces. The morphology and the anatase–Rutile transformation were probed by scanning electronic microscopy (SEM) and X-ray diffraction (XRD) respectively. SEM micrographs show that the dopants enhance the growth of particles of TiO 2 thin layers. The change of lattice parameters confirms that Fe 3+ enter anatase structure and affect the anatase–Rutile transformation. For the iron loading regime studied here, the anatase–Rutile transformation is inhibited at low dopant levels with respect to undoped titania. While the anatase–Rutile transformation is promoted as iron loading is increased. Moreover, synthesized pH value also has a pronounced effect on the anatase–Rutile transformation and a highly acidic environment favors the formation of Rutile.
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The effect of iron ions on the anatase–Rutile Phase transformation of titania (TiO2) in mica–titania pigments
Dyes and Pigments, 2012Co-Authors: Qiang Gao, Yueming FanAbstract:Abstract Rutile TiO 2 -coated mica–titania pigments were prepared by hydrolysis of titanium tetrachloride in the presence of Fe 3+ . After calcination at 700 °C for 2 h, TiO 2 nanolayers in Rutile Phase were formed on the mica surfaces. The morphology and the anatase–Rutile transformation were probed by scanning electronic microscopy (SEM) and X-ray diffraction (XRD) respectively. SEM micrographs show that the dopants enhance the growth of particles of TiO 2 thin layers. The change of lattice parameters confirms that Fe 3+ enter anatase structure and affect the anatase–Rutile transformation. For the iron loading regime studied here, the anatase–Rutile transformation is inhibited at low dopant levels with respect to undoped titania. While the anatase–Rutile transformation is promoted as iron loading is increased. Moreover, synthesized pH value also has a pronounced effect on the anatase–Rutile transformation and a highly acidic environment favors the formation of Rutile.
Dominic Bresser - One of the best experts on this subject based on the ideXlab platform.
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Effect of the Secondary Rutile Phase in Single‐Step Synthesized Carbon‐Coated Anatase TiO 2 Nanoparticles as Lithium‐Ion Anode Material
Energy Technology, 2021Co-Authors: Adele Birrozzi, Raphaelle Belchi, Johann Bouclé, Dorin Geiger, Ute Kaiser, Stefano Passerini, Nathalie Herlin-boime, Dominic BresserAbstract:TiO2 has been investigated as alternative anode material candidate for lithium-ion batteries for several years now due to its advantageous safety and rate capability in combination with its non-toxicity and abundance. Herein, we report the synthesis via laser pyrolysis, which allows the single-step, industrial-scale realization of carbon-coated TiO2 nanoparticles. The modification of the synthesis parameters enables the variation of the Rutile-to-anatase Phase ratio. Following a comprehensive physicochemical and electrochemical characterization, both the higher and lower Rutile-to-anatase ratio show very stable cycling in lithium battery half-cells, while the extended presence of the Rutile Phase limits the achievable specific capacity and lowers the apparent lithium-ion diffusion coefficient, which leads to relatively lower capacities at elevated current densities.
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effect of the secondary Rutile Phase in single step synthesized carbon coated anatase tio 2 nanoparticles as lithium ion anode material
Energy technology, 2021Co-Authors: Adele Birrozzi, Raphaelle Belchi, Johann Bouclé, Dorin Geiger, Ute Kaiser, Stefano Passerini, Nathalie Herlinboime, Dominic BresserAbstract:TiO2 has been investigated as alternative anode material candidate for lithium-ion batteries for several years now due to its advantageous safety and rate capability in combination with its non-toxicity and abundance. Herein, we report the synthesis via laser pyrolysis, which allows the single-step, industrial-scale realization of carbon-coated TiO2 nanoparticles. The modification of the synthesis parameters enables the variation of the Rutile-to-anatase Phase ratio. Following a comprehensive physicochemical and electrochemical characterization, both the higher and lower Rutile-to-anatase ratio show very stable cycling in lithium battery half-cells, while the extended presence of the Rutile Phase limits the achievable specific capacity and lowers the apparent lithium-ion diffusion coefficient, which leads to relatively lower capacities at elevated current densities.
Wei Wen - One of the best experts on this subject based on the ideXlab platform.
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UV and visible light photocatalytic activity of Au/TiO 2 nanoforests with Anatase/Rutile Phase junctions and controlled Au locations
Scientific reports, 2017Co-Authors: Wei Wen, Xin-yue Qian, Jiabin LiuAbstract:To magnify anatase/Rutile Phase junction effects through appropriate Au decorations, a facile solution-based approach was developed to synthesize Au/TiO2 nanoforests with controlled Au locations. The nanoforests cons®isted of anatase nanowires surrounded by radially grown Rutile branches, on which Au nanoparticles were deposited with preferred locations controlled by simply altering the order of the fabrication step. The Au-decoration increased the photocatalytic activity under the illumination of either UV or visible light, because of the beneficial effects of either electron trapping or localized surface plasmon resonance (LSPR). Gold nanoparticles located preferably at the interface of anatase/Rutile led to a further enhanced photocatalytic activity. The appropriate distributions of Au nanoparticles magnify the beneficial effects arising from the anatase/Rutile Phase junctions when illuminated by UV light. Under the visible light illumination, the LSPR effect followed by the consecutive electron transfer explains the enhanced photocatalysis. This study provides a facile route to control locations of gold nanoparticles in one-dimensional nanostructured arrays of multiple-Phases semiconductors for achieving a further increased photocatalytic activity.
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uv and visible light photocatalytic activity of au tio 2 nanoforests with anatase Rutile Phase junctions and controlled au locations
Scientific Reports, 2017Co-Authors: Wei Wen, Xin-yue Qian, Jiabin LiuAbstract:To magnify anatase/Rutile Phase junction effects through appropriate Au decorations, a facile solution-based approach was developed to synthesize Au/TiO2 nanoforests with controlled Au locations. The nanoforests cons®isted of anatase nanowires surrounded by radially grown Rutile branches, on which Au nanoparticles were deposited with preferred locations controlled by simply altering the order of the fabrication step. The Au-decoration increased the photocatalytic activity under the illumination of either UV or visible light, because of the beneficial effects of either electron trapping or localized surface plasmon resonance (LSPR). Gold nanoparticles located preferably at the interface of anatase/Rutile led to a further enhanced photocatalytic activity. The appropriate distributions of Au nanoparticles magnify the beneficial effects arising from the anatase/Rutile Phase junctions when illuminated by UV light. Under the visible light illumination, the LSPR effect followed by the consecutive electron transfer explains the enhanced photocatalysis. This study provides a facile route to control locations of gold nanoparticles in one-dimensional nanostructured arrays of multiple-Phases semiconductors for achieving a further increased photocatalytic activity.
Raphaelle Belchi - One of the best experts on this subject based on the ideXlab platform.
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Effect of the Secondary Rutile Phase in Single‐Step Synthesized Carbon‐Coated Anatase TiO 2 Nanoparticles as Lithium‐Ion Anode Material
Energy Technology, 2021Co-Authors: Adele Birrozzi, Raphaelle Belchi, Johann Bouclé, Dorin Geiger, Ute Kaiser, Stefano Passerini, Nathalie Herlin-boime, Dominic BresserAbstract:TiO2 has been investigated as alternative anode material candidate for lithium-ion batteries for several years now due to its advantageous safety and rate capability in combination with its non-toxicity and abundance. Herein, we report the synthesis via laser pyrolysis, which allows the single-step, industrial-scale realization of carbon-coated TiO2 nanoparticles. The modification of the synthesis parameters enables the variation of the Rutile-to-anatase Phase ratio. Following a comprehensive physicochemical and electrochemical characterization, both the higher and lower Rutile-to-anatase ratio show very stable cycling in lithium battery half-cells, while the extended presence of the Rutile Phase limits the achievable specific capacity and lowers the apparent lithium-ion diffusion coefficient, which leads to relatively lower capacities at elevated current densities.
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effect of the secondary Rutile Phase in single step synthesized carbon coated anatase tio 2 nanoparticles as lithium ion anode material
Energy technology, 2021Co-Authors: Adele Birrozzi, Raphaelle Belchi, Johann Bouclé, Dorin Geiger, Ute Kaiser, Stefano Passerini, Nathalie Herlinboime, Dominic BresserAbstract:TiO2 has been investigated as alternative anode material candidate for lithium-ion batteries for several years now due to its advantageous safety and rate capability in combination with its non-toxicity and abundance. Herein, we report the synthesis via laser pyrolysis, which allows the single-step, industrial-scale realization of carbon-coated TiO2 nanoparticles. The modification of the synthesis parameters enables the variation of the Rutile-to-anatase Phase ratio. Following a comprehensive physicochemical and electrochemical characterization, both the higher and lower Rutile-to-anatase ratio show very stable cycling in lithium battery half-cells, while the extended presence of the Rutile Phase limits the achievable specific capacity and lowers the apparent lithium-ion diffusion coefficient, which leads to relatively lower capacities at elevated current densities.