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针对日益严重的CO污染问题,通过在制备过程中引入CTAB模板,采用水热法对SnO_2催化剂的形貌结构进行控制。同时采用X射线衍射(XRD)、透射电镜(TEM)、N_2吸附(BET)、热重分析(TGA)以及H_2程序升温还原(H_2-TPR)等技术对SnO_2催化剂的结构及氧化还原能力进行表征,并考察了其催化CO氧化活性。结果表明:水热法合成的SnO_2催化剂为纳米颗粒状,具有高比表面积、均一粒径、分布均匀等特点,表面Sn~(4+)浓度高于沉淀法制备的SnO_2催化剂,并且表现出了更加优异的CO氧化活性,表观活化能(Ea)从61.3下降到54.2 kJ·mol~(-1)。
In order to deal with the increasingly serious problem of CO pollution, the morphology of SnO 2 catalyst was controlled by introducing CTAB template in the preparation process and hydrothermal method. The structures and redox capacities of SnO_2 catalysts were also characterized by XRD, TEM, BET, TGA and H_2-TPR. , And investigated its catalytic CO oxidation activity. The results show that the SnO 2 catalyst synthesized by hydrothermal method has the characteristics of high specific surface area, uniform particle size and uniform distribution. The Sn 4+ concentration is higher than that of the SnO 2 catalyst prepared by the precipitation method. The more excellent CO oxidation activity, the apparent activation energy (Ea) decreased from 61.3 to 54.2 kJ · mol -1.