By a News Reporter-Staff News Editor at Journal of Engineering -- New research on Photocatalytics is the subject of a report. According to news reporting from Beijing, People's Republic of China, by VerticalNews journalists, research stated, "A graphene-based two-dimensional (2D) nanoplatform provides new opportunities for fabricating 2D heterojunction interfaces to fortify charge transfer in semiconductor assemblies. In this report, TiO2 nanosheet/graphene composite based 2D-2D heterojunctions were fabricated by a solvothermal process."
The news correspondents obtained a quote from the research from the Chinese Academy of Science, "Microscopic and spectroscopic characterization revealed a homogeneous sheetlike morphology with intimate interfacial contact between the TiO2 nanosheet and graphene due to chemical interactions. Compared with 0D-2D Degussa P25 (TiO2)/graphene and 1D-2D TiO2 nanotube/graphene composites, the 2D-2D TiO2 nanosheet/graphene hybrid demonstrated higher photocatalytic activity toward the degradation of rhodamine B and 2,4-dichlorophenol under UV irradiation. Radical trapping and ESR experiments revealed the enhanced generation of center dot OH and O-2(center dot-) in the 2D-2D heterojunction system. By analyzing TiO2 excited state deactivation lifetime, the interfacial electron transfer rates determined for 0D-2D, 1D-2D, and 2D-2D TiO2/graphene composites were 1.15 x 10(8) s(-1), 3.47 x 10(8) s(-1), and 1.06 X 10(9) s(-1), respectively. It was therefore proposed that the fast charge separation in the TiO2 nanosheet/graphene photocatalyst promoted the generation of reactive oxygen species and enhanced the photodegradation reactions."
According to the news reporters, the research concluded: "The results underscore the key role of nanomaterial dimensionality in interfacial charge transfer processes."
For more information on this research see: Two-Dimensional Interface Engineering of a Titania-Graphene Nanosheet Composite for Improved Photocatalytic Activity. ACS Applied Materials & Interfaces, 2013;5(24):13035-13041. ACS Applied Materials & Interfaces can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; ACS Applied Materials & Interfaces - www.pubs.acs.org/journal/aamick)
Our news journalists report that additional information may be obtained by contacting J. Sun, Chinese Academy Sci, State Key Lab Environm Chem & Ecotoxicol, Ecoenvironm Sci Res Center, Beijing 100085, People's Republic of China. Additional authors for this research include H. Zhang, L.H. Guo and L.X. Zhao.
Keywords for this news article include: Asia, Beijing, Engineering, Photocatalyst, Nanotechnology, Emerging Technologies, People's Republic of China
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