研究目的
To explore a low-cost and high-efficiency water oxidation catalyst for the aim of commercialization and industrialization of photocatalytic water splitting.
研究成果
The CCO/BWO hybrid photocatalyst exhibits enhanced photocatalytic activity and photostability for water oxidation under visible-light irradiation, achieving an average O2 generation rate of 953 μmol h?1 g?1. The efficient separation of photogenerated electrons and holes in the CCO/BWO hybrid photocatalyst significantly reduces the probability of electron-hole recombination and increases the efficiency of carrier separation.
研究不足
The study focuses on the synthesis and photocatalytic performance of CCO/BWO nanocomposites under visible-light irradiation, but the scalability and long-term stability under industrial conditions are not addressed.
1：Experimental Design and Method Selection:
The study employed a facile hydrothermal method to synthesize a novel photocatalyst based on Co(CO3)
2：5(OH)·11H2O/Bi2WO6 nanocomposites. Sample Selection and Data Sources:
The samples were prepared using Co(NO3)2·6H2O, NH4F, urea, and different amounts of BWO nanosheets as starting materials.
3：List of Experimental Equipment and Materials:
The crystallinity and purity of the samples were characterized by powder X-ray diffraction (XRD) measurements, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and high-resolution TEM (HRTEM).
4：Experimental Procedures and Operational Workflow:
The photocatalytic O2 evolution reactions were carried out in a closed reactor under visible-light irradiation.
5：Data Analysis Methods:
The optical absorption properties were investigated by UV–vis diffuse reflectance spectroscopy (DRS), and the band structures were characterized with Mott-Schottky plots.
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Scanning electron micro-analyzer
Hitachi S-4800
Hitachi
Morphology characterization
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Transmission electron microscope
JEOL JEM-2100F
JEOL
Analysis of samples
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UV–vis spectrophotometer
Thermo Nicolet Evolution 500
Thermo Nicolet
Acquisition of UV–vis DRS spectra
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Electron spin resonance spectrometer
JEOL JES-FA200
JEOL
Measurement of ESR spectra
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Gas chromatograph
Agilent Technologies GC-7890B
Agilent Technologies
Online gas analysis
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X-ray diffractometer
Philips PW 3040/60
Philips
Characterization of crystallinity and purity of the samples
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Fluorescence spectrophotometer
FLS 920
Measurement of PL spectra
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Zennium E station
ZAHNER
Mott-Schottky measurements and EIS measurements
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Xe lamp
MicroSolar 300
Perfect Light
Irradiation source for photocatalytic O2 evolution reactions
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