SO2 chemisorption on SnO2〈Sb〉

We have studied SO2 chemisorption on antimony-doped SnO2 samples annealed at 200 and 600°C. Increasing the annealing temperature from 200 to 600°C makes the sample surface more homogeneous. In the range 100–200°C, the electrical conductivity of the samples air-annealed at 600°C increases in proportion with the amount of absorbed SO2. Doping with 0.2 at % Sb ensures the largest increase in conductivity upon chemisorption.