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Study Results from Peking University Update Understanding of Alcohols

January 31, 2014



By a News Reporter-Staff News Editor at Energy Weekly News -- Investigators publish new report on Alcohols. According to news reporting from Beijing, People's Republic of China, by VerticalNews journalists, research stated, "Photocatalytic dissociation of methanol (CH3OH) on a TiO2(110) surface has been studied by temperature programmed desorption (TPD) at 355 and 266 nm. Primary dissociation products, CH2O and H atoms, have been detected."

The news correspondents obtained a quote from the research from Peking University, "The dependence of the reactant and product TPD signals on irradiation time has been measured, allowing the photocatalytic reaction rate of CH3OH at both wavelengths to be directly determined. The initial dissociation rate of CH3OH at 266 nm is nearly 2 orders of magnitude faster than that at 355 nm, suggesting that CH3OH photocatalysis is strongly dependent on photon energy."

According to the news reporters, the research concluded: "This experimental result raises doubt about the widely accepted photocatalysis model on TiO2, which assumes that the excess potential energy of charge carriers is lost to the lattice via strong coupling with phonon modes by very fast thermalization and the reaction of the adsorbate is thus only dependent on the number of electron-hole pairs created by photoexcitation."

For more information on this research see: Strong Photon Energy Dependence of the Photocatalytic Dissociation Rate of Methanol on TiO2(110). Journal of the American Chemical Society, 2013;135(50):19039-19045. Journal of the American Chemical Society can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Journal of the American Chemical Society - www.pubs.acs.org/journal/jacsat)

Our news journalists report that additional information may be obtained by contacting C.B. Xu, Peking University, Int Center Quantum Mat, Beijing 100871, People's Republic of China. Additional authors for this research include W.S. Yang, Z.F. Ren, D.X. Dai, Q. Guo, T.K. Minton and X.M. Yang.

Keywords for this news article include: Asia, Beijing, Alcohols, Methanol, Photocatalyst, Nanotechnology, Photocatalytic, Emerging Technologies, People's Republic of China

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Source: Energy Weekly News


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