PREPARATION OF SILICA TUBULAR NANO-STRUCTURE WITH HIGH SURFACE AREA

摘要

Silica nanotubes were simply synthesized through the oxidation pyrolysis of coated and continuous combustion removal of silicon precursor on the surface of carbon nanofibers with prescribed conditions. The inner parts that carbon nanofibers can afford hollow structure to produce silica nanotubes of which the dimension was almost the same with the frame carbon nanofiber. The wall of the resulting silica nanotubes was very thin less than 5 nm. The products showed high surface areas of 450～800 m~2/g which can be controlled by the synthesis conditions. The pore size distribution was of quite homogeneous meso-pores. Various carbon nanofibers are being applied as templates, to generate silica nanotubes of corresponding dimension and shapes.