Soft-Chemical Synthesis of Nanometer-Thick Carbon-Coated Titania: Effect of Carbon-Coating on the Photocatalytic Activity of TiO2

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Abstract:

Nanometer-thick carbon layer can be successfully coated on titanium oxide via a novel soft-chemical route involving a dehydration process of adsorbed carbohydrate molecules assisted by sulfuric acid. According to powder X-ray diffraction and Ti K-edge X-ray absorption spectroscopic analysis, carbon-coating leads to no significant modification in the anatase-type atomic arrangement of titanium oxide. Transmission electron microscopy, elemental CHNS analysis, and micro-Raman spectroscopy clearly demonstrated that disordered graphitic carbon layer is uniformly coated on the surface of titanium oxide. Of special importance is that the carbon-coating can improve an ability of titanium oxide to remove organic pollutant. On the basis of the experimental findings, we are able to conclude that the present low temperature dehydration method provides a less energy-consuming route not only to the carbon-coating of titanium oxide but also to the improvement of the photocatalytic activity of semiconducting metal oxide.
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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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