研究目的
Investigating the synergistic adsorption and photo-Fenton degradation of methylene blue by ZnFe2O4/SiO2 magnetic double-mesoporous-shelled hollow spheres for wastewater treatment.
研究成果
The ZnFe2O4/SiO2 MDSHSs exhibit excellent adsorption and photo-Fenton catalytic performance for MB degradation in a wide pH range, with high stability and reusability, making them promising for wastewater treatment applications.
研究不足
The study focuses on the degradation of methylene blue, and the applicability to other pollutants needs further investigation. The stability and reusability under extreme conditions were not extensively explored.
1：Experimental Design and Method Selection:
A solvothermal method was used to synthesize ZnFe2O4/SiO2 magnetic double-mesoporous-shelled hollow spheres (MDSHSs).
2：Sample Selection and Data Sources:
Methylene blue (MB) was selected as the model pollutant.
3：List of Experimental Equipment and Materials:
Zn(NO3)2·6H2O, Fe(NO3)3·9H2O, urea, ethylene glycol, hollow silica spheres, H2O2, and a 250 W Xe lamp with a cutoff filter (λ > 420 nm).
4：Experimental Procedures and Operational Workflow:
The adsorption and photo-Fenton degradation experiments were conducted under various conditions to evaluate the performance of MDSHSs.
5：Data Analysis Methods:
UV-VIS spectrophotometry was used to measure MB concentration, and ICP-OES was used for metal ion concentration measurement.
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Scanning electron microscopy
Hitachi S-4800II
Hitachi
Used for SEM measurements to observe the morphology of materials.
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High-resolution transmission electron microscopy
JEOL-2010
JEOL
Used for HRTEM analysis to observe the lattice structure of materials.
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X-ray photoelectron spectroscopy
Thermo VG Thermo Scientific Escalab 250
Thermo Scientific
Used for XPS measurements to analyze the surface composition of materials.
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UV–VIS diffuse reflectance spectra
Shimadzu UV-3101PC
Shimadzu
Used for UV-VIS DRS measurements to analyze the optical properties of materials.
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UV/VIS absorption spectra
Shimadzu UV-2500
Shimadzu
Used for measuring the concentration of MB in solution.
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X-ray powder diffractometer
Bruker D8 Advance
Bruker
Used for XRD analysis to determine the crystal structure of materials.
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Inductively coupled plasma atomic emission spectroscopy
Optima 7300 DV
PerkinElmer
Used for measuring metal ion concentration.
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Transmission electron microscopy
Philips Tecnai-12
Philips
Used for TEM measurements to observe the microstructure of materials.
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Infrared spectrum
Nicolet Aexus 470
Nicolet
Used for FT-IR measurements to identify functional groups of the samples.
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