DOI: 10.6084/m9.figshare.8397587.v1
title: One-step synthesis of magnetic-TiO2-nanocomposites with high iron oxide-composing ratio for photocatalysis of rhodamine 6G

description: Figure 1. XRD patterns of MNPs and magnetic-TiO2-nanocomposites.Figure 2. Characteristics of magnetic-TiO2-nanocomposites. Including XPS spectra of the synthesized MNPs and magnetic-TiO2-nanocomposites (A), Fe2p region spectra (MNPs (B), FexOy/TiO2-0.5 (C), FexOy/TiO2-0.35 (D), FexOy@TiO2-0.5 (E) and FexOy@TiO2-0.35 (F)) and magnetization curve for magnetic-TiO2-nanocomposites (G).Figure 3. Langmuir (dotted line) and Freundlich (solid line) adsorption isotherms of R6G on the synthesized magnetic-TiO2-nanocomposites, ((A) for FexOy/TiO2-0.5, (B) for FexOy/TiO2-0.35, (C) for FexOy@TiO2-0.5 and (D) for FexOy@TiO2-0.35.) spots represent experimental data. Figure 4. Impacts of pH on R6G photocatalysis performance. (A) pH=3, (B) pH=7, (C) pH=10. Dotted lines represent photolysis of R6G under UV-irradiation without magnetic-TiO2-nanocomposites, solid lines represent removal rate of R6G under UV-irradiation with magnetic-TiO2-nanocomposites. Experimental conditions: UV-irradiation, 253 nm (20 W); magnetic-TiO2-nanocomposites concentration, 0.4 g/L; initial R6G concentration, 10 mg/L. Figure 5. Impacts of magnetic-TiO2-nanocomposite concentration on R6G degradation kinetics. (A) FexOy/TiO2-0.5, (B) FexOy/TiO2-0.35, (C) FexOy@TiO2-0.5 and (D) FexOy@TiO2-0.35. Experimental conditions: UV-irradiation, 253 nm (20 W); initial R6G concentration, 10 mg/L; initial magnetic-TiO2-nanocomposites concentration, 0.2 mg/L, 0.4 mg/L and 0.8 mg/L, respectively; pH, 7.0.Figure 6. R6G degradation performance after reusing magnetic-TiO2-nanocomposites 5 times. Dotted lines represent blank R6G without magnetic-TiO2-nanocomposites, solid lines represent removal rate of R6G under UV-irradiation with magnetic-TiO2-nanocomposites. Experimental conditions: UV-irradiation, 253 nm (20 W); initial magnetic TiO2 nanocomposites concentration, 0.4 g/L; initial R6G concentration, 10 mg/L; pH, 7.0.Figure S3. Energy dispersive spectroscopy pattern of synthesized magnetic-TiO2-nanocomposites. (A) FexOy/TiO2-0.5, (B) FexOy/TiO2-0.35 (C) FexOy@TiO2-0.5 and (D) FexOy@TiO2-0.35.Figure S4. R6G adsorption kinetics on the synthesized magnetic-TiO2-nanocomposites. (A) 1 mg/L, (B) 5 mg/L, (C) 10 mg/L, (D) 15 mg/L, (E) 20 mg/L, (F) 25 mg/L. Experimental conditions: magnetic-TiO2-nanocomposites concentration, 0.4 g/L; pH, 7.0.Figure S5. Impacts of pH on R6G adsorption on the synthesized magnetic-TiO2-nanocomposites. Experimental conditions: magnetic-TiO2-nanocomposites concentration, 0.4 g/L; initial R6G concentration, 10 mg/L.Figure S6. R6G declining curves of the synthesized magnetic-TiO2-nanocomposites without UV-irradiation. (A) pH=3.0, (B) pH=7.0, (C) pH=10.0.Figure S7. Impacts of irradiation wavelength on the R6G photocatalytic degradation of the synthesized magnetic-TiO2-nanocomposites. (A) 460 nm, (B) 540 nm.Figure S8. Percentage of R6G loss during the photocatalysis process. The number in x-axis (0.2, 0.4 and 0.8) refers to the concentration of the synthesized magnetic-TiO2-nanocomposites (mg/L).Figure S9. Effects of magnetic-TiO2-nanocomposite concentration on R6G photodegradation kinetics. (A) FexOy/TiO2-0.5, (B) FexOy/TiO2-0.35, (C) FexOy@TiO2-0.5 and (D) FexOy@TiO2-0.35.