https://scholars.lib.ntu.edu.tw/handle/123456789/367604
Title: | Nitrogen-doped anatase nanofibers decorated with noble metal nanoparticles for photocatalytic production of hydrogen | Authors: | Wu, M.-C. YANG-FANG CHEN WEI-FANG SUet al. |
Keywords: | hydrogen production; nanowire; nitrogen-doped anatase; photocatalysis | Issue Date: | 2011 | Journal Volume: | 5 | Journal Issue: | 6 | Start page/Pages: | 5025-5030 | Source: | ACS Nano | Abstract: | We report the synthesis of N-doped TiO2 nanofibers and high photocatalytic efficiency in generating hydrogen from ethanol-water mixtures under UV-A and UV-B irradiation. Titanate nanofibers synthesized by hydrothermal method are annealed in air and/or ammonia to achieve N-doped anatase fibers. Depending on the synthesis route, either interstitial N atoms or new N-Ti bonds appear in the lattice, resulting in slight lattice expansion as shown by XPS and HR-TEM analysis, respectively. These nanofibers were then used as support for Pd and Pt nanoparticles deposited with wet impregnation followed by calcination and reduction. In the hydrogen generation tests, the N-doped samples were clearly outperforming their undoped counterparts, showing remarkable efficiency not only under UV-B but also with UV-A illumination. When 100 mg of catalyst (N-doped TiO2 nanofiber decorated with Pt nanoparticles) was applied to 1 L of water-ethanol mixture, the H2 evolution rates were as high as 700 μmol/h (UV-A) and 2250 μmol/h (UV-B) corresponding to photo energy conversion percentages of ∼3.6 and ∼12.3%, respectively. © 2011 American Chemical Society. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-79959793399&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/367604 |
DOI: | 10.1021/nn201111j | SDG/Keyword: | Energy conversion; Ethanol; Hydrogen production; Metal nanoparticles; Mixtures; Nanofibers; Nanowires; Nitrogen; Photocatalysis; Platinum; Precious metals; Titanium dioxide; Ethanol water mixtures; Hydrogen generations; Hydrothermal methods; Nitrogen-doped; Photocatalytic efficiency; Production of hydrogen; Titanate nanofiber; Water ethanol mixtures; Doping (additives); alcohol; hydrogen; metal nanoparticle; nanofiber; palladium; platinum; titanium; titanium dioxide; water; article; catalysis; chemistry; light; methodology; nanotechnology; photochemistry; time; transmission electron microscopy; ultraviolet radiation; Catalysis; Ethanol; Hydrogen; Light; Metal Nanoparticles; Microscopy, Electron, Transmission; Nanofibers; Nanotechnology; Palladium; Photochemistry; Platinum; Time Factors; Titanium; Ultraviolet Rays; Water |
Appears in Collections: | 材料科學與工程學系 |
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