研究目的
To prepare a series of new composite photocatalysts to degrade phenol and norfloxacin under visible light irradiation and investigate their photocatalytic performance and cyclic stability.
研究成果
The Fe-complex/TiO2 composite photocatalysts exhibited excellent photocatalytic activity and stability under visible light for the degradation of phenol and norfloxacin. The conjugated structure of the Fe-complexes and the interfacial interaction with TiO2 were crucial for enhancing photocatalytic performance. The study provides insights into the design of efficient and stable photocatalysts for water treatment.
研究不足
The study focuses on the degradation of phenol and norfloxacin under visible light, and the findings may not be directly applicable to other pollutants or under different light conditions. The stability and recyclability of the photocatalysts were tested for three cycles, which may not fully represent long-term performance.
1：Experimental Design and Method Selection:
The study involved the preparation of Fe-complex/TiO2 composite photocatalysts via hydrothermal method and their characterization using XRD, UV-Vis absorption spectra, SEM, TEM, XPS, and electrochemical experiments.
2：Sample Selection and Data Sources:
Phenol and norfloxacin were selected as model pollutants. The photocatalytic degradation experiments were performed under visible light irradiation.
3：List of Experimental Equipment and Materials:
Equipment included a xenon lamp, UV-Vis spectrophotometer, HPLC, IC, and ESR spectrometer. Materials included TiO2 nanoparticles, Fe-complexes, and organic pollutants.
4：Experimental Procedures and Operational Workflow:
The photocatalytic degradation of phenol and norfloxacin was monitored under visible light, with samples taken at intervals for analysis.
5：Data Analysis Methods:
The degradation efficiency was analyzed using UV-Vis spectrophotometry, and the degradation products were identified using HPLC and IC.
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2,2′-bipyridine-4,4′-diphosphoric acid
H2dpbpy
Sigma Corporation
Used as a ligand in the synthesis of Fe-complexes.
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UV-Vis spectrophotometer
GENESYS 10S
Themo
Used to analyze the concentration of phenol and NOR in photocatalytic degradation experiments.
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Ion chromatography
ICS-2100
Themo USA
Used to analyze the degradation products of phenol.
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Ferrous sulfate heptahydrate
FeSO4·7H2O
Aladdin Reagent
Used as a precursor for the synthesis of Fe-complexes.
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1,10-phenanthroline
phen
Aladdin Reagent
Used as a ligand in the synthesis of Fe-complexes.
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2,2-bipyridyl
bpy
Aladdin Reagent
Used as a ligand in the synthesis of Fe-complexes.
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Norfloxacin
NOR
Aladdin Reagent
Used as a model pollutant in photocatalytic degradation experiments.
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P25
P25
Aladdin Reagent
Used as a reference photocatalyst in the study.
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Tert-butanol
tBuOH
Aladdin Reagent
Used as a hydroxyl radical scavenger in free radical capture experiments.
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Xenon lamp
300 W
Used as a light source for photocatalytic degradation experiments.
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High performance liquid chromatography
Agilent 1200
USA
Used to analyze the degradation products of phenol.
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Electron spin resonance spectrometer
JES-FA200
Used to determine the ESR signal of the radicals spin-trapped by DMPO.
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Total organic carbon analyzer
Shimadzu TOC-L CPH CN200
Used to determine the total organic carbon (TOC) during photocatalytic degradation.
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