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Glutathione-coated Fe3O4 nanoparticles with enhanced Fenton-like activity at neutral pH for degrading 2,4-dichlorophenol
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2017-12-14 00:00:00 , DOI: 10.1039/c7ta09685b Rui Zhou 1, 2, 3, 4, 5 , Ningfei Shen 1, 2, 3, 4, 5 , Jian Zhao 1, 2, 3, 4, 5 , Yu Su 1, 2, 3, 4, 5 , Hejun Ren 1, 2, 3, 4, 5
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2017-12-14 00:00:00 , DOI: 10.1039/c7ta09685b Rui Zhou 1, 2, 3, 4, 5 , Ningfei Shen 1, 2, 3, 4, 5 , Jian Zhao 1, 2, 3, 4, 5 , Yu Su 1, 2, 3, 4, 5 , Hejun Ren 1, 2, 3, 4, 5
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Magnetic glutathione (GSH)-functionalized nanocomposites (Fe3O4@GSH) were synthesized via an oxidative polymerization method and characterized as a heterogeneous Fenton-like catalyst for 2,4-dichlorophenol (2,4-DCP) degradation at neutral pH (pH = 6.5). The performance of the composite was extensively investigated in terms of catalytic activity and factors (H2O2 dosage, catalyst loading, initial solution pH, and 2,4-DCP concentration) influencing 2,4-DCP degradation. Iron leaching, primary reactive oxidizing species, and catalyst reusability were also investigated. The results showed that the removal efficiency can reach up to 99% within 240 min in the presence of Fe3O4@GSH, whereas pure Fe3O4 cannot operate under the same circumstances. Hydroxyl radicals (˙OH) were found as the main reactive oxidizing species responsible for pollutant degradation, and the final removal efficiency still reached 94% after recycling three times. The role of GSH can be ascribed to the acceleration of iron leaching from the surface of Fe3O4 and collective action for H2O2. The Fe3O4@GSH catalyst may provide new insights into the Fenton-like process for enhancing contaminant degradation.
中文翻译：
谷胱甘肽包覆的Fe 3 O 4纳米颗粒在中性pH下具有增强的芬顿样活性，可降解2,4-二氯苯酚
通过氧化聚合方法合成了磁性谷胱甘肽（GSH）-官能化的纳米复合材料（Fe 3 O 4 @GSH），并表征为在中性pH（2,4-DCP）下降解2,4-二氯苯酚（2,4-DCP）的非均相类Fenton催化剂。 pH = 6.5）。就催化活性和影响2,4-DCP降解的因素（H 2 O 2用量，催化剂负载，初始溶液pH和2,4-DCP浓度）进行了广泛研究，研究了复合材料的性能。还研究了铁的浸出，主要的反应性氧化物质和催化剂的可重复使用性。结果表明，在Fe 3 O 4存在下240min内去除率可达99％。@GSH，而纯Fe 3 O 4不能在相同情况下运行。发现羟基自由基（˙OH）是造成污染物降解的主要反应性氧化物质，经过3次循环后，最终去除效率仍达到94％。谷胱甘肽的作用可以归因于从Fe 3 O 4表面浸出的铁的加速和H 2 O 2的集体作用。Fe 3 O 4 @GSH催化剂可能为类Fenton增强污染物降解的过程提供新的见解。
更新日期：2017-12-14
中文翻译：
谷胱甘肽包覆的Fe 3 O 4纳米颗粒在中性pH下具有增强的芬顿样活性，可降解2,4-二氯苯酚
通过氧化聚合方法合成了磁性谷胱甘肽（GSH）-官能化的纳米复合材料（Fe 3 O 4 @GSH），并表征为在中性pH（2,4-DCP）下降解2,4-二氯苯酚（2,4-DCP）的非均相类Fenton催化剂。 pH = 6.5）。就催化活性和影响2,4-DCP降解的因素（H 2 O 2用量，催化剂负载，初始溶液pH和2,4-DCP浓度）进行了广泛研究，研究了复合材料的性能。还研究了铁的浸出，主要的反应性氧化物质和催化剂的可重复使用性。结果表明，在Fe 3 O 4存在下240min内去除率可达99％。@GSH，而纯Fe 3 O 4不能在相同情况下运行。发现羟基自由基（˙OH）是造成污染物降解的主要反应性氧化物质，经过3次循环后，最终去除效率仍达到94％。谷胱甘肽的作用可以归因于从Fe 3 O 4表面浸出的铁的加速和H 2 O 2的集体作用。Fe 3 O 4 @GSH催化剂可能为类Fenton增强污染物降解的过程提供新的见解。
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