Abstract: Tin dioxide with doped nanofibers was prepared by electrospinning a mixture solution. Polyvingl pyrrolidone acted as a polymer intermediate，stannic chloride pentahydrate transformed to tin dioxide, silicon dioxide is a doping material ,respectively. The porous tin dioxide nanofibers were obtained using hydrofluoric acid etched, which depend on the different chemical properties between tin dioxide and silicon dioxide. The morphology of tin dioxide nanofibers was characterized by scanning electron microscope and transmission electron microscopy. X-ray diffractometer and energy dispersive X-ray spectrometer were measured to assess the structure of nanofibers. Especially, the specific surface area of tin dioxide nanofibers was detected. The study revealed that the diameters of tin dioxide nanofibers were increased by adding more silicon dioxide nanoparticles, and the surface roughness of nanofibers was increased as well. After hydrofluoric acid treated, the swelling phenomenon was happened on the nanofibers, but silicon dioxide nanoparticles were successful etched and the specific surface area of tin dioxide nanofibers was increased.

Key words: tin dioxide nanofiber, electrospinning, silicon dioxide doping, specific surface area