Mesostructured silica nanotubes have been synthesized in a system of carbon nanotubes/cetyltrimethylammonium bromide/tetraethyl orthosilicate/NH3-H2O through one-pot hydrothermal route. The obtained sample was characterized with X-ray diffraction, nitrogen sorption, scanning electron microscopy, transmission electron microscopy and energy dispersive X-ray techniques. These results indicate mesostructured silica nanotubes exhibit small tube diameters (10-40 nm), uniform mesopores (2.5 nm), and a huge pore volume (1.7 cm(3)/g). (C) 2009 Elsevier Inc. All rights reserved.