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Carbon-coated TiO 2 was synthesized by mixing TiO 2 powders and polyethylene glycol, followed by heat treatment in nitrogen atmosphere. All samples were characterized by powder X-ray diffraction, UV diffuse reflectance spectroscopy, high-resolution transmission electron microscopy, and nitrogen adsorption. The photocatalytic activity of carbon-coated TiO 2 for benzene degradation...
Carbon nanotubes (CNTs) with sharp tips were synthesized by a hydrogen arc discharge method. Three unusual morphologies, i.e., a cone-shaped tip, a suddenly-shrinking tip, and a pencil point-like tip were observed. These novel tip structures are considered to be related to the addition of a small amount of silicon powder in the raw material, which may introduce structural defects in the CNTs. The...
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