The Influence of Cu Dopant Concentration on the Optical Properties of Fe₃O₄/SiO₂/TiO₂ Nanocomposite

Abstract:

Fe₃O₄/SiO₂/TiO₂ dopped Cu with magnetic properties had been succesfully syntesized and characterized. The research was began with the synthesis of magnetite and magnetite covered by silica by co-precipitation and sonication method, and the preparation of Cu-doped TiO₂ using sol-gel method followed by calcination. The concentrations of Cu were 0%, 1%, 3%, 5%, and 7% (FST0, FST1, FST3, FST5, and FST7). The Fourier Transform Infra Red spectrophotometer (FTIR), X-Ray Diffractometer (XRD), Scanning Electron Microscope-Energy Dispersive X-ray spectrophotometer (SEM-EDX), UV-Specular Reflectance Spectrophotometer (SR-UV), and Transmission Electron Microscope (TEM) were used to characterize the nanocomposite and external magnetic bar was used to separate the nanocomposite in an aqueous media. The Cu concentration affected the band gap energy (Eg) and the optimum result was 2.832 eV in FST7. The best magnetic propertieswas material FST0. The time needed for separate this material with aqueous medium was 372 second.

• Periodical: Materials Science Forum (Volume 948)
• Pages: 260-266
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.948.260
• Online since: March 2019
• Authors: Aisyiah Restutiningsih Putri Utami, M. Sulthon Nurharman Syah Putra, M. Miqdam Musawwa, Eko Sri Kunarti*
• Keywords: Cu Dopant, Fe₃O₄, Magnetic, Optical Properties, SiO₂, TiO₂ Nanocomposite

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