Magnetic MIL(Fe)-type MOF-derived N-doped nano-ZVI@C rods as heterogeneous catalyst for the electro-Fenton degradation of gemfibrozil in a complex aqueous matrix
Magnetic MIL(Fe)-type MOF-derived N-doped nano-ZVI@C rods as heterogeneous catalyst for the electro-Fenton degradation of gemfibrozil in a complex aqueous matrix
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DOI：
10.1016/j.apcatb.2020.118604
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发表时间：
2020-06
影响因子：
22.1
通讯作者：
Zhihong Ye;J. A. Padilla;E. Xuriguera;E. Brillas;I. Sirés
中科院分区：
文献类型：
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作者：
Zhihong Ye;J. A. Padilla;E. Xuriguera;E. Brillas;I. Sirés
金属-有机骨架（MOFs）作为悬浮多相催化剂在电芬顿（EF）水处理中的应用几乎不存在。由邻苯二甲酸基连接剂合成的Fe-MOFs为纺锤形MIL（Fe）-88B和NH 2-MIL（Fe）-88B晶体，而它们的煅烧产生纳米ZVI @C和纳米ZVI @C-N。将脂质调节剂吉非罗齐掺入0.050 M Na 2SO 4溶液或城市废水中，并在具有空气扩散阴极的电解池中处理以产生H2 O2。在800 °C下获得的纳米ZVI @C-N催化剂显示出最高的活性，具有高稳定性，这是由低铁浸出和高可回收性推断的。几乎所有的药物去除和显着的矿化是可行的，在两个矩阵在近中性pH值。核壳纳米ZVI和Fe 3 O 4纳米粒子封装在N掺杂的纺锤形多孔碳棒的存在下被揭示，确保Fe（III）转化为Fe（II）。碳中掺杂N有利于催化剂活性的提高，强磁性有利于后处理催化剂的回收。
The application of metal-organic frameworks (MOFs) as suspended heterogeneous catalysts in electro-Fenton (EF) process for water treatment is almost inexistent. Fe-MOFs synthesized from phthalic acid-based linkers were spindle-shaped MIL(Fe)-88B and NH2-MIL(Fe)-88B crystals, whereas their calcination yielded nano-ZVI@C and nano-ZVI@C-N. The lipid regulator gemfibrozil was spiked into 0.050 M Na2SO4solutions or urban wastewater and treated in electrolytic cells with an air-diffusion cathode to generate H2O2. The nano-ZVI@C-N catalyst obtained at 800 °C showed the highest activity, with high stability as deduced from the low iron leaching and high recyclability. Almost total drug removal and significant mineralization was feasible in both matrices at near-neutral pH. The presence of core-shell nano-ZVI and Fe3O4nanoparticles encapsulated in N-doped fusiform porous carbon rods was revealed, ensuring the Fe(III) conversion to Fe(II). Carbon doping with N contributed to the enhanced catalytic activity, and the strong magnetism facilitated the post-treatment catalyst recovery.