The activity of Au catalyst supported by activated carbon(Au/AC) for decomposition of low-level ozone was evaluated.The influence of preparation conditions such as pH value of precursor solution,drying mode and calcining temperature on the catalytic activity was studied,and the ozone removal ratio was tested under different space velocity at ambient temperature.The results show that the procedure of controlling the precursor pH=10,drying catalysts by microwave and being reduced at 200℃ with H2 can improve t...