首页> 外文期刊>RSC Advances >Fe-based metal–organic frameworks as heterogeneous catalysts for highly efficient degradation of wastewater in plasma/Fenton-like systems
【24h】

Fe-based metal–organic frameworks as heterogeneous catalysts for highly efficient degradation of wastewater in plasma/Fenton-like systems

机译:Fe基金属 - 有机框架作为异质催化剂,用于高效降解等离子体/芬顿般的系统中废水的降解

获取原文
           

摘要

Fe-based metal organic frameworks (Fe-MOFs) were successfully synthesized with the dielectric barrier discharge (DBD) plasma method and FeSO _(4) ·7H _(2) O as the Fe precursor. Fe-MOFs were used as Fenton-like catalysts in DBD plasma/Fenton-like technology to treat wastewater, which addressed the issues with iron solubility. Since the valence state of iron will affect the catalytic performance, the Fe precursor FeSO _(4) ·7H _(2) O was added to regulate the valence state and adjust the catalytic performance by improving the availability of active sites. The influences of discharge voltage, catalyst addition amount, H _(2) O _(2) addition amount and pH on the degradation efficiency of methyl orange (MO) were systematically examined. Through free radical capture experiments, the reaction mechanism of the plasma/Fenton-like catalytic degradation process was deduced primarily as the coordinated oxidation process of hydroxyl radicals (·OH), photo-generated holes (h ~(+) ) and superoxide radicals (·O _(2) ~(?) ). The reusability experiments proved that the catalyst was stable and reusable. The possible degradation pathways were proposed based on the identification of intermediate products generated in the degradation process by liquid chromatography-mass spectrometry (LC-MS) analyses.
机译:用介电阻挡放电(DBD)等离子体方法和FeSO _(4)·7H _(2)o作为Fe前体成功地合成了Fe基金属有机框架(Fe-Mof)。 Fe-Mof被用作芬顿类催化剂的DBD等离子体/芬顿等技术,以治疗废水,这解决了铁溶性的问题。由于铁的价态会影响催化性能,因此加入FESOOR FESO _(4)·7h _(2)o以调节价态,通过改善活性位点的可用性来调节催化性能。放电电压,催化剂添加量,H _(2)O _(2)添加量和pH对甲基橙(MO)降解效率的影响。通过自由基捕获实验,推导出等离子体/芬顿状催化降解过程的反应机理,主要用作羟基自由基的配位氧化过程(·OH),光产生的孔(H〜(+))和超氧化物自由基( ·O _(2)〜(?))。可重用性实验证明催化剂是稳定可重复使用的。提出了可能的降解途径,基于通过液相色谱 - 质谱(LC-MS)分析在降解过程中产生的中间产物的鉴定。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号