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首页> 外文期刊>RSC Advances >Heterogeneous Fenton-like catalysis of Fe-MOF derived magnetic carbon nanocomposites for degradation of 4-nitrophenol
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Heterogeneous Fenton-like catalysis of Fe-MOF derived magnetic carbon nanocomposites for degradation of 4-nitrophenol

机译：Fe-MOF衍生的磁性碳纳米复合物的非均相Fenton状催化降解4-硝基苯酚

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摘要

Magnetic carbon nanocomposites (Fe–Cx) as heterogeneous Fenton-like catalysts were synthesized by the pyrolysis of iron based metal-organic frameworks (Fe-MOF), and the degradation removal of 4-nitrophenol (4-NP) in aqueous solution was used to evaluate the catalytic activity of Fe–Cx. The results showed that 4-NP could be effectively degraded by Fe–Cx in the presence of hydrogen peroxide. Pyrolysis temperature significantly affected the component, structures and performances of the catalysts, and the as-prepared Fe–C500 exhibited the best catalytic performance. Furthermore, the effects of several reaction conditions, such as catalyst loading, H2O2 dosage, reaction temperature, and initial pH, on the catalytic degradation of 4-NP were extensively analyzed for the practical applications of Fe–C500. At an initial circumneutral pH of 6.21, 89.0% of 0.36 mM 250 mL of 4-NP solution could be degradated after 75 min by the heterogeneous Fenton-like oxidation on the 0.08 g L?1 of Fe–C500 in the presence of 7.8 mM H2O2. The results of activation energy and the reaction kinetics showed Fe–C500 possessed a high catalytic activity in the heterogeneous Fenton reaction of 4-NP. Moreover, the prepared Fe–C500 could be reused by an external magnet, and still retained good catalytic activity with 52.4% degradation of 4-NP at the fourth cycle.
机译：通过铁基金属有机骨架（Fe）的热解合成了磁性碳纳米复合材料（Fe–C x ） -MOF），并通过降解去除4-硝基苯酚（4-NP）来评估Fe–C x < / small>。结果表明，在过氧化氢存在下，Fe–C x 可以有效降解4-NP。热解温度显着影响催化剂的组成，结构和性能，制备的Fe–C 500 催化剂表现出最好的催化性能。此外，催化剂负载量，H 2 O 2 用量，反应温度等几种反应条件的影响以及初始pH值对Fe-C 500 的实际应用进行了广泛分析。在初始环境pH为6.21的情况下，在75分钟后，通过在0.08 g L ？1 上进行的非均相Fenton氧化可降解89.0％的0.36 mM 250 mL 4-NP溶液。 Fe–C 500 的在7.8 mM H 2 O < sub> 2 。活化能和反应动力学结果表明，Fe-C 500 在4-NP的非均相Fenton反应中具有较高的催化活性。而且，制得的Fe–C 500 可以被外部磁体重复使用，并且仍保持良好的催化活性，在第四个循环中4-NP的降解率为52.4％。

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