Highly Enhanced Surface Area of Tin Oxide Nanocrystals

摘要

Tin oxide nanocrystals with high surface area were first synthesized in aqueous solutions at 50℃. The Brunauer-Emmett-Teller (BET) surface area successfully reached 194 m~2/g. It was much higher than that of SnO_2 (BET 47.2 m~2/g), SnO_2 (BET 25.9 m~2/g), SnO_2 (BET 23 m~2/g), and In_2O_3-SnO_2 (BET 3-6 m~2/g)- N_2 adsorption characteristics revealed that they had pores of 1-3 nm, which contributed to the high surface area. Transmission electron microscopy, electron diffraction, and X-ray diffraction indicated the morphology, crystal structure, and chemical composition of nanocrystals. Novel process allowed us to avoid sintering and deformation of the crystals, and hence realized a high surface area and unique morphology.