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Inexpensive synthesis of a high-performance Fe3O4-SiO2-TiO2 photocatalyst: Magnetic recovery and reuse

Title
Inexpensive synthesis of a high-performance Fe3O4-SiO2-TiO2 photocatalyst: Magnetic recovery and reuse
Author
김희택
Keywords
sol-gel; photocatalysis; magnetic recovery; TiO2; Fe3O4; SiO2; SOL-GEL SYNTHESIS; TITANIA-SILICA COMPOSITES; METHYLENE-BLUE; ORGANIC CONTAMINANTS; MICROWAVE SYNTHESIS; OPTICAL-PROPERTIES; DYE POLLUTANTS; GRAPHENE OXIDE; THIN-FILMS; DEGRADATION
Issue Date
2016-09
Publisher
SPRINGER
Citation
FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING, v. 10, No. 3, Page. 405-416
Abstract
A sol-gel technique has been developed for the synthesis of a magnetite-silica-titania (Fe3O4-SiO2-TiO2) tertiary nanocomposite with improved photocatalytic properties based on the use of inexpensive titania and silica precursors. The exceptional photocatalytic activity of the resulting materials was demonstrated by using them to photocatalyze the degradation of methylene blue solution. The best formulation achieved 98% methylene blue degradation. An interesting feature of the present work was the ability to magnetically separate and reuse the catalyst. The efficiency of the catalyst remained high during two reuses. The synthesized nanomaterials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy, ultra-violet-visible spectroscopy, diffuse reflectance spectroscopy, and thermogravimetric analysis. XRD analysis revealed the formation of multicrystalline systems of cubic magnetite and anatase titania crystals. SEM and TEM characterization revealed well-developed and homo-geneously dispersed particles of size less than 15 nm. FTIR spectra confirmed the chemical interaction of titania and silica. It was further noticed that the optical properties of the prepared materials were dependent on the relative contents of their constituent metal oxides.
URI
https://link.springer.com/article/10.1007/s11705-016-1579-xhttps://repository.hanyang.ac.kr/handle/20.500.11754/69376
ISSN
2095-0179; 2095-0187
DOI
10.1007/s11705-016-1579-x
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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