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Characterization and reactivity of Mn-Ce-O composites for catalytic ozonation of antipyrine

机译：锰-铈-氧复合物对安替比林催化臭氧氧化的表征和反应活性

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Mn-Ce-Ocomposites were prepared by a redox-precipitation method and used as a catalyst for ozonation of antipyrine (AP) in aqueous solution. The phase composition, surface area and electron transfer ability of the products are dependent on the molar ratio of precursors. Mn-Ce-O(8/2) exhibited the highest activity for the degradation and mineralization of AP with ozone, which can be attributed to its high electron transfer ability. The decomposition of ozone into (OH)-O-center dot can be accelerated through the electron transfer between ozone and catalyst. The refractory intermediates in ozonation and catalytic ozonation were identified and the catalytic performances of Mn-Ce-O(8/2) for these intermediates were also investigated. The hydroxyl radical reaction played an important role in the degradation of the refractory intermediates, and the contribution of surface reactions was strengthened with decreasing pH. A possible mechanism for the catalytic ozonation of AP was proposed.
机译：Mn-Ce-复合材料通过氧化还原沉淀法制备，并用作水溶液中安替比林（AP）臭氧化的催化剂。产物的相组成，表面积和电子转移能力取决于前体的摩尔比。 Mn-Ce-O（8/2）对AP的臭氧降解和矿化活性最高，这可以归因于其高电子传递能力。可以通过臭氧与催化剂之间的电子转移来加速臭氧分解为（OH）-O-中心点。确定了难降解的中间体在臭氧氧化和催化臭氧氧化中的作用，并研究了Mn-Ce-O（8/2）对这些中间体的催化性能。羟基自由基反应在耐火中间体的降解中起重要作用，并且随着pH值的降低，表面反应的作用增强。提出了一种可能的AP催化臭氧氧化的机理。

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