Fabrication of magnetic Fe3O4/silica nanofiber composites with enhanced Fenton-like catalytic performance for Rhodamine B degradation
Fabrication of magnetic Fe3O4/silica nanofiber composites with enhanced Fenton-like catalytic performance for Rhodamine B degradation
复制标题
磁性 Fe3O4/二氧化硅纳米纤维复合材料的制备，具有增强的类 Fenton 催化性能，可降解罗丹明 B
DOI：
10.1007/s10853-017-1490-y
复制
发表时间：
2018-01-01
影响因子：
4.5
通讯作者：
Wang, Hao
中科院分区：
文献类型：
--
作者：
Tang, Xuekun;Feng, Qiming;Wang, Hao
采用原位高温分解法将Fe 3 O 4纳米粒子（Fe 3 O 4 NP）成功地固定在多孔SiO2纳米纤维（PSNF）表面，制备了Fe 3 O 4/PSNF杂化类Fenton催化剂。对Fe 3 O 4/PSNF的晶相、显微结构和性能进行了详细的表征。结果表明，PSNF表面通过Fe-O-Si界面键生长出直径为10-80 nm的立方尖晶石结构的Fe_3O_4纳米粒子。Fe 3 O 4/PSNF表面部分被Fe 3 O 4 NP覆盖，使Fe 3 O 4/PSNF中硅醇的表面羟基得以很好的保留。通过一系列降解罗丹明B的动力学实验，评价了Fe 3 O 4/PSNF和裸Fe 3 O 4 NP的类Fenton催化性能。结果表明，Fe 3 O 4/PSNF比裸Fe 3 O 4 NP具有更高的吸附容量和类Fenton催化活性。此外，Fe 3 O 4/PSNF催化剂具有良好的稳定性和可循环性，易于磁性分离和重复使用。它提出，PSNF显着提高了催化活性，通过使一个高度分散的Fe 3 O 4 NP和提供丰富的微孔/介孔和大的表面积，具有较强的吸附和亲水性能。
Tiny Fe3O4nanoparticles (Fe3O4NP) were successfully immobilized on the surface of porous silica nanofibers (PSNF) to form a novel hybrid Fenton-like catalyst of Fe3O4/PSNF through an in situ high-temperature decomposition method. The crystalline phase, microstructure and specific properties of Fe3O4/PSNF were characterized in detail. It was found that the Fe3O4NP with cubic spinel structure and diameter of 10–80 nm was grown on the surface of PSNF through interfacial Fe–O–Si bond. The surface of PSNF was partly covered by Fe3O4NP, which made the surface hydroxyl groups of silanol well maintained in Fe3O4/PSNF. The Fenton-like catalytic performances of Fe3O4/PSNF and naked Fe3O4NP were evaluated through a series of kinetic tests on degradation of Rhodamine B. The results show that the Fe3O4/PSNF has much higher adsorption capacity and Fenton-like catalytic activity than those of naked Fe3O4NP. Besides, the Fe3O4/PSNF also shows good stability and recyclability, and as a result, the novel catalyst is easily separated by magnetic method and reused for further reaction. It is proposed that the PSNF significantly improves the catalytic activity by making a highly dispersed Fe3O4NP and providing abundant micro/mesopores and a large surface area with strong adsorptive and hydrophilic properties.