School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing, 210094, China.
School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing, 210094, China.
Chemosphere. 2021 Dec;285:131523. doi: 10.1016/j.chemosphere.2021.131523. Epub 2021 Jul 10.
This work reported the fast synthesis of magnetic polydopamine Au-Fenton catalyst (FeO@PDA/Au) under UV irradiation at 365 nm. The microstructure of prepared nanocomposites was characterized by various techniques. The effects of several key factors (pH values, HO content and TC concentration) of tetracycline (TC) degradation were evaluated. The results revealed that the TC and total organic carbon (TOC) removal rate reached up to 98.16% and 93.14% within 300 min under optimal conditions (pH 3, HO 80 μL, TC concentration 20 mg/L). Besides, HO radicals were generated during the Fenton-like degradation process and the plausible degradation mechanism was discussed. Moreover, FeO@PDA/Au catalyst retained excellent catalytic capacity (TC removal rate 96.94% and TOC removal rate 87.69%) and exhibited fantastic stability after six cycles. Moreover, metal ions leaching was evaluated (0.023 mg/L). Altogether, the novel FeO@PDA/Au Fenton-like catalyst is highly promising for wastewater management.
这项工作报道了在 365nm 紫外光照射下快速合成磁性聚多巴胺 Au-Fenton 催化剂（FeO@PDA/Au）。采用多种技术对制备的纳米复合材料的微观结构进行了表征。评价了四环素（TC）降解的几个关键因素（pH 值、HO 含量和 TC 浓度）的影响。结果表明，在最佳条件下（pH3、HO80μL、TC 浓度 20mg/L），300min 内 TC 和总有机碳（TOC）的去除率分别达到 98.16%和 93.14%。此外，在类 Fenton 降解过程中生成了 HO 自由基，并讨论了可能的降解机制。此外，FeO@PDA/Au 催化剂在六次循环后保持了优异的催化能力（TC 去除率 96.94%和 TOC 去除率 87.69%），表现出优异的稳定性。此外，还评估了金属离子浸出（0.023mg/L）。总之，新型 FeO@PDA/Au 类 Fenton 催化剂在废水处理方面具有广阔的应用前景。
