期刊
CHEMOSPHERE
卷 291, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2021.132741
关键词
Anthraquinone; Azo dye; Hexaferrite; Noble metals; Photodegradation; Sol-gel auto-combustion
资金
- council of Iran National Science Foun-dation (INSF) [97017837]
- University of Kashan [159271/FSR1]
Magnetic-plasmonic nanocomposites were synthesized and used as photocatalysts for the degradation of anionic dyes with different chromophores. The production of surface plasmon resonance electrons by noble metals facilitated the formation of active radicals, leading to a significant improvement in dye degradation.
Magnetic-plasmonic nanocomposites are suitable candidates for photocatalytic activity due to both optical and magnetic properties. So initially, we synthesized strontium hexaferrite nanoparticles (NPs) by three different methods: microwave, sol-gel Pechini, sol-gel auto-combustion, and SrFe12O19@Ag, SrFe12O19@Au core-shell by ultrasound-assisted auto-combustion in the presence of beetroot juice. X-Ray Powder Diffraction (XRD), Fourier Transform Infrared (FT-IR), Energy Dispersive X-Ray (EDX), Field Emission Scanning Electron Microscopy (FESEM), Transmission Electron Microscopy (TEM), Brunauer-Emmett-Teller (BET), Diffuse Reflectance Spectroscopy (DRS), and Vibrating Sample Magnetometer (VSM) analyses were utilized to examine their purity, morphology, optical and magnetic properties. The nanoproducts were applied as photocatalysts to degrade the anionic dyes with different chromophores under various visible light sources within 2 h. Among different dyes (mono-azo, diazo, anthraquinone, and triaryl methane), Eosin as a triaryl methane dye had the maximum degradation by SrFe12O19@Ag and SrFe12O19@Au, which are about 95.9%, 93.88%, respectively. Indeed, produced surface plasmon resonance (SPR) electrons by the noble metals facilitate the formation of active radicals to destruct the dyes.
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