Efficient degradation of drug ibuprofen through catalytic activation of peroxymonosulfate by Fe3C embedded on carbon
Efficient degradation of drug ibuprofen through catalytic activation of peroxymonosulfate by Fe3C embedded on carbon
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通过嵌入碳上的 Fe3C 催化活化过一硫酸盐来有效降解药物布洛芬
DOI：
10.1016/j.jes.2018.10.002
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发表时间：
2019
影响因子：
6.9
通讯作者：
Tang Heqing
中科院分区：
文献类型：
--
作者：
Zhang Guangli;Ding Yaobin;Nie Wenshan;Tang Heqing
布洛芬（Ibuprofen， IBU）是一种非甾体抗炎药，作为新兴污染物正在成为医药和个人护理产品（PPCPs）的重要成员。为了降解IBU，采用溶胶-凝胶燃烧法制备了磁性Fe3C纳米颗粒包埋在n掺杂碳（Fe3C/NC）上作为催化剂。经表征，Fe3C/NC纳米颗粒由NC纳米片和片上包裹的Fe3C颗粒组成。Fe3C/NC纳米颗粒被证实是一种高效的催化剂，可催化过氧单硫酸根（PMS）的活化，产生硫酸盐自由基（SO4•-）、单氧（1O2）和羟基自由基（•OH），从而降解IBU。0.1 g/L Fe3C/NC和2 g/L PMS在30 min内几乎完全去除添加的IBU（10 mg/L）。通过浸出测试和循环实验，证实该催化剂具有良好的性能和良好的重复使用性能。提出了PMS在Fe3C/NC上的催化活化机理，该机理包括Fe3C活性位点和n掺杂碳基体作为Fe3C/NC的活性位点。通过对降解中间体的检测，提出了IBU在Fe3C/NC-PMS体系中的降解途径。
Ibuprofen (IBU), a nonsteroidal anti-inflammatory drug, is becoming an important member of pharmaceuticals and personal care products (PPCPs) as emerging pollutants. To degrade IBU, magnetic Fe3C nanoparticles embedded on N-doped carbon (Fe3C/NC) were prepared as a catalyst by a sol–gel combustion method. As characterized, the Fe3C/NC nanoparticles were composed of a NC nano-sheet and capsulated Fe3C particles on the sheet. The Fe3C/NC nanoparticles were confirmed an efficient catalyst for peroxymonosulfate (PMS) activation to generate sulfate radicals (SO4•-), single oxygen (1O2) and hydroxyl radicals (•OH) toward the degradation of IBU. The added IBU (10 mg/L) was almost completely removed in 30 min by using 0.1 g/L Fe3C/NC and 2 g/L PMS. The catalyst was confirmed to have good ability and excellent reusability through leaching measurements and cycle experiments. A catalytic mechanism was proposed for the catalytic activation of PMS on Fe3C/NC, which involves both Fe3C reactive sites and N-doped carbon matrix as reactive sites in Fe3C/NC. Moreover, the degradation pathway of IBU in the Fe3C/NC-PMS system was proposed according to the detections of degradation intermediates.