Fabrication of magnetic Fe3O4/silica nanofiber composites with enhanced Fenton-like catalytic performance for Rhodamine B degradation
Source abstract
Abstract
Tiny Fe3O4 nanoparticles (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.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Nanomaterials in Catalysis · Carbon and Quantum Dots Applications · Advanced Photocatalysis Techniques
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