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- W4210425525 abstract "This study prepares Fe3O4@[email protected]2 (FAT) particles via a solvothermal route, then thermally treats the particles over a temperature range from 300 to 500 °C in flowing nitrogen atmosphere to form Fe3O4@[email protected]2-xNx (x = 0.056 to 0.15) (FATN) core-shell composite particles. The FATN particles comprise an outermost TiO2-xNx shell of about 20–50 nm in thickness, a Brunauer-Emmett-Teller surface area of 103.2–152.5 m2/g, and a Barrett-Joyner-Halenda pore size of 12.9–30.2 nm. The particles show dye adsorption and visible-light photocatalysis against a model methylene-blue (MB) dye in water. For the FATN particles being treated at 400 °C, they show a dark adsorption of 54.8% and an additional visible-light photodegradation of 25.1% when using a dyed wastewater with an initial MB concentration of 5 × 10-6 M. This compares favorably to those being treated at other nitridation temperatures. The 500 °C-treated FATN particles yet exhibit a dark adsorption of 99.1% against the MB solution. Use of an external magnet can facilely recycle the composite particles. The recycled particles remain greater than 72% of their initial MB removal capability after use of five times. The intermediate Ag nanolayer can release Ag ions to the surrounding water medium through the mesoporous shell channel. The time-dependent Ag release appears to follow the Voigt-Maxwell model and reaches 0.764 ppm after 48 h, suggesting a long-time releasing efficacy." @default.
- W4210425525 created "2022-02-08" @default.
- W4210425525 creator A5076640209 @default.
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- W4210425525 date "2022-05-01" @default.
- W4210425525 modified "2023-10-18" @default.
- W4210425525 title "Multifunctional Fe3O4@Ag@TiO2-xNx core-shell composite particles for dye adsorption and visible-light photocatalysis" @default.
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- W4210425525 doi "https://doi.org/10.1016/j.ceramint.2022.01.275" @default.
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