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TiO2 Nanotubes/MWCNTs Nanocomposite Photocatalysts: Synthesis, Characterization and Photocatalytic Hydrogen Evolution Under UV-Vis Light Illumination

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Nanocomposite of TiO2 nanotubes (TiO2NTs) and multiwalled carbon nanotubes (MWCNTs) hasbeen synthesized by a hydrothermal method and firstly used in photocatalytic hydrogen production.The obtained TiO2 NTs/MWCNTs composites were characterized by X-ray diffraction, transmissionelectron microscopy, Raman spectrum and ultraviolet-visible diffuse reflectance spectroscopy. Theexperimental results revealed that the MWCNTs were decorated with well dispersed anatase TiO2nanotubes with a diameter of 8–15 nm. A slight blue shift and weak symmetry was observed forthe strongest Raman peak which resulted from strain gradients originating from interface integrationbetween TiO2 nanotubes and MWCNTs. The photocatalytic activity of the as-prepared sampleswas evaluated by hydrogen evolution from water splitting using Na2S and Na2SO3 as sacrificialreagents under UV-vis light irradiation. Enhanced photocatalytic activity compared with P25 hasbeen observed for the resulted samples. The nanocomposite with optimized MWCNTs content of1% displayed a hydrogen production rate of 161 μmol·h−1·g−1. Good photocatalytic stability of theas-synthesized samples was observed as well.
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Document Type: Research Article

Publication date: March 1, 2012

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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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