Multi-shelled FeCo2O4 hollow porous microspheres/CCFs magnetic hybrid and its dual-functional catalytic performance
Multi-shelled FeCo2O4 hollow porous microspheres/CCFs magnetic hybrid and its dual-functional catalytic performance
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多壳FeCo2O4空心多孔微球/CCFs磁杂化物及其双功能催化性能
DOI：
10.1016/j.cej.2017.08.018
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发表时间：
2017-12
影响因子：
15.1
通讯作者：
张蕾
中科院分区：
文献类型：
--
作者：
张丹风;张国振;张蕾
采用溶剂热法将具有三维结构的磁性空心三壳FeCo 2 O 4（TS-FeCo 2 O 4）微球直接固定在棉纤维素纤维（CCFs）基底上，并对其进行浸渍-煅烧处理。详细讨论了以β-环糊精为模板剂的多壳结构的形成机理。与纯单壳FeCo 2 O 4（SS-FeCo 2 O 4）、TS-FeCo 2 O 4和SS-FeCo 2 O 4/CCF相比，TS-FeCo 2 O 4/CCF对四环素（TC）、孔雀石绿色（MG）的光催化降解和4-硝基苯酚（4-NP）的催化还原均表现出最佳的双功能催化活性。TS-FeCo_2 O_4独特的多壳层中空结构、具有“d 7”（Co元素）和“d 6”（Fe元素）电子构型的金属氧化物的存在以及CCF的引入有利于双功能催化剂的性能。通过Mott-Schottky、活性物种分析和紫外-可见光谱实验，推测了TS-FeCo 2 O 4/CCF的双功能催化机理。TS-FeCo 2 O 4/CCF具有良好的磁性，易于分离和重复使用。这项工作为修复有机污染物的高活性3D结构双功能催化剂的设计和构建提供了新的见解。
The magnetic hollow triple-shelled FeCo2O4(TS-FeCo2O4) microsphere with 3D architecture was anchored directly on cotton cellulose fibers (CCFs) substrates through the solvothermal method with further dipping-calcination treatment. The formation mechanism of multi-shelled structure, which usedβ-cyclodextrin as the template was discussed in detail. Comparison with pure single-shelled FeCo2O4(SS-FeCo2O4), TS-FeCo2O4and SS-FeCo2O4/CCFs, TS-FeCo2O4/CCFs displayed optimal dual-functional catalytic activities towards photodegradation of tetracycline (TC), malachite green (MG) and catalytic reduction of 4-nitrophenol (4-NP). The unique multi-shells and hollow interior structure of TS-FeCo2O4, the presence of metal oxide with ‘d7’ (Co element) and ‘d6’ (Fe element) electronic configurations, and the introduction of CCFs were beneficial to dual-functional catalytic properties. The possible dual-functional catalytic mechanism by TS-FeCo2O4/CCFs was deduced based on the Mott-Schottky, active species analysis and UV–Vis experiments. Because of the noticeable magnetic properties, TS-FeCo2O4/CCFs could be easily separated and reused. This work provided novel insights into the design and construction of high active 3D architecture dual-functional catalysts to remediation of organic pollutants.
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