Fe2O3改性高岭土的制备及其在依诺沙星的多相电催化氧化中的应用,Applied Catalysis B: Environment and Energy

当前位置： X-MOL 学术 › Appl. Catal. B Environ. Energy › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Fe2O3改性高岭土的制备及其在依诺沙星的多相电催化氧化中的应用
Applied Catalysis B: Environment and Energy ( IF 20.2 ) Pub Date : 2016-07-26 06:53:30
Ali Özcan, Ayça Atılır Özcan, Yusuf Demirci, Erol Şener

研究了含铁催化剂Fe ₂ O ₃改性高岭土（Fe ₂ O ₃ -KLN）的制备和使用，以开发用于电化学氧化依诺沙星（ENXN）的非均相电子芬顿法。所制备的Fe ₂ O ₃ -KLN的表征使用不同的方法进行。在存在Fe ₂ O ₃ -KLN催化剂的情况下，电芬顿法的矿化效率提高了。研究了影响异质电芬顿治疗效率的实验变量。在存在0.3 g Fe ₂ O ₃的情况下，ENXN的矿化率达到最大值-KLN在300mA。虽然在2.0和3.0的pH值下ENXN的矿化效率要高得多，但在5.1和7.1的pH值下也可以观察到ENXN的总矿化率。五次运行后，发现Fe ₂ O ₃ -KLN的活性下降很小（0.5％）。表征研究表明，在实验过程中，Fe ₂ O ₃ -KLN的形态和化学结构的变化可以忽略不计。铁的浸出量（约0.006mM）表明羟基自由基主要是由表面铁物种的异质反应产生的。GC-MS，HPLC和LC-MS分析可以鉴定某些有机氧化中间体。无机氧化中间体（F ^-，NO ₃ ^-和NH ₄ ⁺）通过IC分析鉴定。提出了一种氧化途径用于ENXN的矿化。

"点击查看英文标题和摘要"

Preparation of Fe2O3 modified kaolin and application in heterogeneous electro-catalytic oxidation of enoxacin

Preparation and use of an iron containing catalyst, Fe₂O₃ modified kaolin (Fe₂O₃-KLN), was investigated to develop a heterogeneous electro-Fenton process for the electrochemical oxidation of enoxacin (ENXN). The characterizations of the prepared Fe₂O₃-KLN were performed using different methods. Mineralization efficiency of the electro-Fenton method increased in the presence of Fe₂O₃-KLN catalyst. The experimental variables that affect the efficiency of heterogeneous electro-Fenton treatment were investigated. Mineralization rates of ENXN reached its maximal value in the presence of 0.3g Fe₂O₃-KLN at 300mA. While the mineralization efficiency of ENXN was much higher in pH values of 2.0 and 3.0, the total mineralization of ENXN was also observed at pH values of 5.1 and 7.1. A very small decrease (0.5%) was found in the activity of Fe₂O₃-KLN after five runs. Characterization studies showed that the change in the morphology and chemical structure of Fe₂O₃-KLN during the experiments was negligible. The amount of leached iron (∼0.006mM) revealed that hydroxyl radicals were mainly produced by heterogeneous reactions of surface iron species. GC–MS, HPLC and LC–MS analysis allowed the identification of some of organic oxidation intermediates. Inorganic oxidation intermediates (F⁻, NO₃ ⁻ and NH₄ ⁺) were identified by IC analysis. An oxidation pathway was proposed for the mineralization of ENXN.

更新日期：2016-07-26

点击分享

点击收藏

阅读更多本刊新发论文