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Metal-doped organic aerogels for photocatalytic degradation of trimethoprim
Chemical Engineering Journal ( IF 13.3 ) Pub Date : 2018-09-18 , DOI: 10.1016/j.cej.2018.09.127
J. Bolobajev , M. Kask , K. Kreek , M. Kulp , M. Koel , A. Goi

The study on the photocatalytic activity of organic aerogels produced from Estonian oil shale processing by-products and doped with Fe, Ni, Cu, Zn and Co was performed for the first time in water treatment processes. The synthesis of aerogels from oil shale phenolic compounds is unique and promising approach in application of novel materials with photocatalytic properties. 2,6-Dihydroxy-4-methylbenzoic acid (dHMBA) with the ion-exchange moiety (carboxylic group) susceptible for the metal-doping and 5-methylresorcinol (MR) were selected for the synthesis of aerogels. Although these chemicals are commercially available, it was less costly and environmentally friendlier to use by-products from Estonian oil shale industry, which otherwise could be considered as production wastes. The bacteriostatic antibiotic trimethoprim (TMP) was selected as a target pollutant due to its environmental concern. TMP was found to be resistant to photolytic degradation and required the additional degradation improvement by means of photocatalysis. The unique structural features of studied materials allowed achieving the synergistic effect of adsorption and photocatalytic oxidation. The subjected hypothesis on the photocatalytic activity of studied metal-doped organic aerogels (Me[OA]s) except Cu[OA] was successfully confirmed, whereas the results of using Cu[OA] indicated the presence of combined photolysis and adsorption. Trimethoprim degradation followed oxygenation and demethylation pathways.



中文翻译:

金属掺杂的有机气凝胶对甲氧苄氨嘧啶的光催化降解

在水处理过程中,首次对爱沙尼亚油页岩加工副产物生产并掺有Fe,Ni,Cu,Zn和Co的有机气凝胶的光催化活性进行了研究。由油页岩酚类化合物合成气凝胶是应用具有光催化性能的新型材料的独特且有前途的方法。选择具有易受金属掺杂影响的离子交换部分(羧基)的2,6-二羟基-4-甲基苯甲酸(dHMBA)和5-甲基间苯二酚(MR)来合成气凝胶。尽管这些化学药品是可商购的,但使用来自爱沙尼亚油页岩工业的副产品成本较低且对环境更友好,否则可将其视为生产废料。由于其对环境的关注,因此选择了抑菌抗生素甲氧苄氨嘧啶(TMP)作为目标污染物。发现TMP具有抗光解性,并需要通过光催化的方法进一步改善降解。研究材料的独特结构特征使其能够实现吸附和光催化氧化的协同效应。成功地证实了关于除Cu [OA]以外的金属掺杂有机气凝胶(Me [OA] s)的光催化活性的假设,而使用Cu [OA]的结果表明存在光解和吸附相结合的现象。甲氧苄啶降解遵循氧合和脱甲基途径。发现TMP具有抗光解性,并需要通过光催化的方法进一步改善降解。研究材料的独特结构特征使其能够实现吸附和光催化氧化的协同效应。成功地证实了关于除Cu [OA]以外的金属掺杂有机气凝胶(Me [OA] s)的光催化活性的假设,而使用Cu [OA]的结果表明存在光解和吸附相结合的现象。甲氧苄啶降解遵循氧合和脱甲基途径。发现TMP具有抗光解性,并需要通过光催化的方法进一步改善降解。研究材料的独特结构特征使其能够实现吸附和光催化氧化的协同效应。成功地证实了关于除Cu [OA]以外的金属掺杂有机气凝胶(Me [OA] s)的光催化活性的假设,而使用Cu [OA]的结果表明存在光解与吸附相结合的现象。甲氧苄啶降解遵循氧合和脱甲基途径。成功地证实了关于除Cu [OA]以外的金属掺杂有机气凝胶(Me [OA] s)的光催化活性的假设,而使用Cu [OA]的结果表明存在光解和吸附相结合的现象。甲氧苄啶降解遵循氧合和脱甲基途径。成功地证实了关于除Cu [OA]以外的金属掺杂有机气凝胶(Me [OA] s)的光催化活性的假设,而使用Cu [OA]的结果表明存在光解和吸附相结合的现象。甲氧苄啶降解遵循氧合和脱甲基途径。

更新日期:2018-09-18
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