Highly Enhanced Surface Area of Tin Oxide Nanocrystals
Tin oxide nanocrystals with high surface area were first synthesized in aqueous solutions at 50°C. The Brunauer–Emmett–Teller (BET) surface area successfully reached 194 m2/g. It was much higher than that of SnO2 (BET 47.2 m2/g), SnO2 (BET 25.9 m2/g), SnO2 (BET 23 m2/g), and In2O3–SnO2 (BET 3–6 m2/g). N2 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.
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Document Type: Research Article
Affiliations: National Institute of Advanced Industrial Science and Technology (AIST), Nagoya 463-8560, Japan
Publication date: August 1, 2010