The Experts below are selected from a list of 117780 Experts worldwide ranked by ideXlab platform
Zhengcao Li - One of the best experts on this subject based on the ideXlab platform.
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enhanced visible light photocatalytic activity of zno nanowires doped with mn2 and co2 ions
Nanomaterials, 2017Co-Authors: Wei Li, Guojing Wang, Chienhua Chen, Jiecui Liao, Zhengcao LiAbstract:In this research, ZnO nanowires doped with Mn2+ and Co2+ ions were synthesized through a facile and inexpensive hydrothermal approach, in which Mn2+ and Co2+ ions successfully substituted Zn2+ in the ZnO crystal lattice without changing the morphology and crystalline structure of ZnO. The atomic percentages of Mn and Co were 6.29% and 1.68%, respectively, in the doped ZnO nanowires. The photocatalytic results showed that Mn-doped and Co-doped ZnO nanowires both exhibited higher photocatalytic activities than undoped ZnO nanowires. Among the doped ZnO nanowires, Co-doped ZnO, which owns a twice active visible-light photocatalytic performance compared to pure ZnO, is considered a more efficient photocatalyst material. The enhancement of its photocatalytic performance originates from the doped metal ions, which enhance the light absorption ability and inhibit the recombination of photo-Generated Electron-hole pairs as well. The effect of the doped ion types on the morphology, crystal lattice and other properties of ZnO was also investigated.
G A Somorjai - One of the best experts on this subject based on the ideXlab platform.
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the catalytic nanodiode gas phase catalytic reaction Generated Electron flow using nanoscale platinum titanium oxide schottky diodes
Nano Letters, 2005Co-Authors: Xiaozhong Ji, Anthony C Zuppero, Jawahar M Gidwani, G A SomorjaiAbstract:Forty microampere current was Generated on a platinum−titanium dioxide Schottky diode during the platinum catalyzed steady-state oxidation of carbon monoxide at 80 °C. For reaction events that produced four CO2 molecules, three injected Electrons were collected in a diode comprising a 5 nm thick platinum and a 150 nm titanium dioxide film. The Electron injection flux depends on the thickness of the platinum and the titanium dioxide diode properties as well as the conditions of the catalytic reactions.
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the catalytic nanodiode gas phase catalytic reaction Generated Electron flow using nanoscale platinum titanium oxide schottky diodes
Nano Letters, 2005Co-Authors: Anthony C Zuppero, Jawahar M Gidwani, G A SomorjaiAbstract:Forty microampere current was Generated on a platinum-titanium dioxide Schottky diode during the platinum catalyzed steady-state oxidation of carbon monoxide at 80 degrees C. For reaction events that produced four CO(2) molecules, three injected Electrons were collected in a diode comprising a 5 nm thick platinum and a 150 nm titanium dioxide film. The Electron injection flux depends on the thickness of the platinum and the titanium dioxide diode properties as well as the conditions of the catalytic reactions.
Xin Shao - One of the best experts on this subject based on the ideXlab platform.
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one pot microwave assisted combustion synthesis of graphene oxide tio2 hybrids for photodegradation of methyl orange
Journal of Alloys and Compounds, 2013Co-Authors: Xipeng Pu, Dafeng Zhang, Xin Shao, Guqiao Ding, Songsong Li, Shuping ZhaoAbstract:Abstract Graphene oxide (GO)–TiO 2 hybrids (GTHs) were synthesized by a one-pot microwave-assistant combustion method. The structures, morphologies, and photocatalytic properties of samples were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectra, transmission Electron microscopy, X-ray photoElectron spectroscopy, and photoluminescence. The effects of microwave irradiation time and GO content on the photocatalystic performances of as-synthesized GTHs for methyl orange were investigated. The experimental results show that reduction of GO, synthesis of TiO 2 , and nitrogen doping of TiO 2 and graphene can be achieved simultaneously during the combustion process. GTHs showed improved photocatalystic properties than neat TiO 2 , due to the effective transfer of photo-Generated Electron from TiO 2 to GO and improved absorbance performance of GTHs. Moreover, the photostability of GTHs was characterized.
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combustion synthesis of graphene oxide tio2 hybrid materials for photodegradation of methyl orange
Carbon, 2012Co-Authors: Xipeng Pu, Dafeng Zhang, Guqiao Ding, Xin ShaoAbstract:Abstract Graphene oxide (GO)–TiO2 hybrid materials with enhanced photocatalytic properties were synthesized by a one-step combustion method using urea and titanyl nitrate as the fuel and oxidizer, respectively. During the synthesis procedure, the precursors containing GO, fuel, and oxidizer were maintained at different combustion temperatures (300–450 °C) for 10 min to ignite the combustion reaction. The effects of combustion temperatures on the weight loss, chemical status and photocatalytic properties were studied by thermogravimetry and differential scanning calorimetry, X-ray photoElectron spectroscopy, Raman, and photoluminescence. GO in the GO–TiO2 hybrids were not oxidized, but thermally reduced by decomposition of partial oxygen-containing groups. Meantime, the nitrogen doping of GO was achieved. Compared to the neat TiO2 obtained at same condition, GO–TiO2 hybrid obtained at 350 °C exhibited enhanced photodegradation performance, which is attributed to the effective photo-Generated Electron transferring from TiO2 to partially reduced GO, which confirmed by the photoluminescence quenching of TiO2.
Wei Li - One of the best experts on this subject based on the ideXlab platform.
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enhanced visible light photocatalytic activity of zno nanowires doped with mn2 and co2 ions
Nanomaterials, 2017Co-Authors: Wei Li, Guojing Wang, Chienhua Chen, Jiecui Liao, Zhengcao LiAbstract:In this research, ZnO nanowires doped with Mn2+ and Co2+ ions were synthesized through a facile and inexpensive hydrothermal approach, in which Mn2+ and Co2+ ions successfully substituted Zn2+ in the ZnO crystal lattice without changing the morphology and crystalline structure of ZnO. The atomic percentages of Mn and Co were 6.29% and 1.68%, respectively, in the doped ZnO nanowires. The photocatalytic results showed that Mn-doped and Co-doped ZnO nanowires both exhibited higher photocatalytic activities than undoped ZnO nanowires. Among the doped ZnO nanowires, Co-doped ZnO, which owns a twice active visible-light photocatalytic performance compared to pure ZnO, is considered a more efficient photocatalyst material. The enhancement of its photocatalytic performance originates from the doped metal ions, which enhance the light absorption ability and inhibit the recombination of photo-Generated Electron-hole pairs as well. The effect of the doped ion types on the morphology, crystal lattice and other properties of ZnO was also investigated.
Heping Zeng - One of the best experts on this subject based on the ideXlab platform.
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improving the photocatalytic hydrogen production of ag g c3n4 nanocomposites by dye sensitization under visible light irradiation
Nanoscale, 2016Co-Authors: Jiayi Qin, Jingpei Huo, Piyong Zhang, Jian Zeng, Tingting Wang, Heping ZengAbstract:Ag nanoparticles were deposited on the surface of g-C3N4 by a chemical reduction method to increase visible-light absorption via the localized surface plasmon resonance effect, resulting in the reduced recombination of photo-Generated Electron–holes and enhanced photocatalytic activity. The Ag/g-C3N4 composite with a Ag loading of 3 wt% has the optimum photoactivity that is almost 3.6 and 3.4 times higher than pure g-C3N4 and the same photocatalysis system which has been reported, respectively. Fluorescein was introduced as a photosensitizer and H2 evolution soared to 2014.20 μmol g−1 h−1 and the rate is even about 4.8 times higher than that of the 3 wt% Ag/g-C3N4 composite. The chemical structure, composites, morphologies and optical properties of the obtained products are well-characterized by XRD, FTIR, TEM, EDS, XPS and UV-Vis DRS. Meanwhile, the photocatalyst exhibits high stability and reusability.