Xing Shengtao, Lu Xiaoyang, Liu Jia, Zhu Lin, Ma Zichuan, Wu Yinsu
College of Chemistry and Material Sciences, Hebei Normal University, Shijiazhuang 050024, PR China.
College of Chemistry and Material Sciences, Hebei Normal University, Shijiazhuang 050024, PR China.
Chemosphere. 2016 Feb;144:7-12. doi: 10.1016/j.chemosphere.2015.08.044. Epub 2015 Sep 4.
Manganese oxide supported on mesoporous ceria was prepared and used as catalyst for catalytic ozonation of sulfosalicylic acid (SA). Characterization results indicated that the manganese oxide was mostly incorporated into the pores of ceria. The synthesized catalyst exhibited high activity and stability for the mineralization of SA in aqueous solution by ozone, and more than 95% of total organic carbon was removed in 30 min under various conditions. Mechanism studies indicated that SA was mainly degraded by ozone molecules, and hydroxyl radical reaction played an important role for the degradation of its ozonation products (small molecular organic acids). The manganese oxide in the pores of CeO2 improved the adsorption of small molecular organic acids and the generation of hydroxyl radicals from ozone decomposition, resulting in high TOC removal efficiency.
制备了负载在介孔二氧化铈上的氧化锰，并将其用作催化臭氧化磺基水杨酸（SA）的催化剂。表征结果表明，氧化锰大多掺入到二氧化铈的孔中。合成的催化剂对水溶液中SA的矿化表现出高活性和稳定性，在各种条件下30分钟内总有机碳的去除率超过95%。机理研究表明，SA主要被臭氧分子降解，羟基自由基反应对其臭氧化产物（小分子有机酸）的降解起重要作用。CeO2孔中的氧化锰提高了小分子有机酸的吸附以及臭氧分解产生羟基自由基的能力，从而导致高的总有机碳去除效率。
