Anchoring Fe3O4 Nanoparticles on Carbon Nanotubes for Microwave-Induced Catalytic Degradation of Antibiotics
Anchoring Fe3O4 Nanoparticles on Carbon Nanotubes for Microwave-Induced Catalytic Degradation of Antibiotics
复制标题
将 Fe3O4 纳米颗粒锚定在碳纳米管上用于微波诱导的抗生素催化降解
DOI：
10.1021/acsami.8b08280
复制
发表时间：
2018-09-05
影响因子：
9.5
通讯作者：
Xi, Kai
中科院分区：
文献类型：
--
作者：
Liu, Shiyuan;Mei, Lefu;Xi, Kai
微波诱导的催化降解被认为是从污染水中去除金霉素等抗生素的最有效技术之一。这里描述的是一种基于均匀装饰有 Fe3O4 纳米颗粒的碳纳米管 (CNT) 的新型微波诱导氧化催化剂。该材料的介电损耗和磁损耗的结合导致其更强的微波吸收和产生更多“热点”的能力。这些热点促进了金霉素、四环素、土霉素等常见抗生素在微波照射下的氧化。添加清除剂的实验表明，羟基自由基（(OH)-O-中心点）和超氧自由基（O-中心点(2)-）也有助于抗生素的去除。最终的降解产物包括 CO 和 NO3-，经质谱和离子色谱分析证实。结果表明，Fe3O4/CNTs 是微波诱导氧化的有效催化剂。
Microwave-induced catalytic degradation is considered amongst the most efficient techniques to remove antibiotic such as chlortetracycline from contaminated water. Described here is a new microwave-induced oxidation catalyst based on carbon nanotubes (CNTs) decorated uniformly with nanoparticles of Fe3O4. The combination of dielectric loss and magnetic loss of the material contributed to its stronger microwave absorption and the ability to produce more "hot spots". These hot spots promoted the oxidation of common antibiotics such as chlortetracycline, tetracycline, and oxytetracycline under microwave irradiation. Experiments with the addition of scavenger showed that hydroxy radicals ((OH)-O-center dot) together with superoxide radicals (O-center dot(2)-) contributed to the antibiotics removal as well. The final degradation products included CO, and NO3- as confirmed by mass spectroscopy and ion chromatography analyses. The results indicated that the Fe3O4/CNTs was an efficient catalyst for microwave-induced oxidation.