抄録
Porous SnO2 is generally valuable for gas sensors and transparent electrodes. We synthesized a new type of porous SnO2 particles having a high specific surface area (100-190 m2/g) in SnF2 aqueous solutions at 60oC. The deposited particles were submicron-scale spherical aggregates consisting of small primary crystals of ca. 5 nm in diameter. The size and shape of the particles were greatly affected by reaction temperature, aging time and the initial conditions of the precursor solutions, such as pH and SnF2 concentration. An increase in the SnF2 concentration changed the shape of the particles from spheres into prickly forms. Preparation of Sb-doped SnO2 particles was easily achieved by mixing SbF3 in the precursor solutions.
