V_2O_5-MoO_3/TiO_2基催化剂是SCR脱硝系统的重要组成部分。通过实验探究了相同原料在制备催化剂工艺中出现颜色不一现象的原因。结果发现,不同价态钒氧化物的存在会导致煅烧后催化剂颜色的变化,通过在催化剂煅烧过程中增加与O_2的接触,促使高价态钒的生成,能够改善这一问题,使催化剂颜色均一。 V 2 O 5 -MoO 3 / TiO 2 -based catalysts are an important part of SCR denitrification system. The reasons for the different colors in the process of preparing catalysts were investigated through experiments. It was found that the presence of different valence vanadium oxides led to the change of the color of the catalyst after calcination. This problem could be ameliorated by increasing the contact with O_2 during the calcination of the catalyst to promote the formation of valence valences, thereby making the catalysts uniform in color.