研究目的
To design and synthesize a visible-light-response and robust catalyst for efficiently photocatalytic CO2 reduction.
研究成果
The study successfully demonstrates that single titanium-oxide species implanted in 2D g-C3N4 matrix can act as a highly efficient visible-light CO2 reduction photocatalyst, with a high CO generation rate and good stability. This opens new perspectives for the design of single atom catalysts for photocatalytic reactions.
研究不足
The study focuses on the photocatalytic reduction of CO2 to CO under visible light, and the stability and efficiency under different conditions or for other reduction products are not explored.
1：Experimental Design and Method Selection:
The study involves the synthesis of single titanium-oxide species implanted in two-dimensional graphitic carbon nitride (2D TiO-CN) for photocatalytic CO2 reduction.
2：Sample Selection and Data Sources:
The materials used include dicyandiamide, titanium tetrachloride, and other reagents for synthesizing 2D TiO-CN.
3：List of Experimental Equipment and Materials:
Equipment includes X-ray diffractometer, X-ray photoelectron spectrometer, transmission electron microscope, scanning electron microscope, and others.
4：Experimental Procedures and Operational Workflow:
The synthesis involves a dicyandiamide-blowing method, followed by characterization and photocatalytic CO2 reduction tests.
5：Data Analysis Methods:
The performance was evaluated by CO generation rate, and mechanisms were studied using time-resolved fluorescence and electron spin resonance spectroscopy.
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Inductively coupled plasma mass spectrometry
NEXION300
PerkinElmer
Quantification of titanium content
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UV–vis spectrophotometer
UV-3600
Shimadzu
Obtainment of ultraviolet–visible diffuse reflectance spectra
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Gas chromatography
GC-2014+ATF, 230C
Shimadzu
Detection of produced gases
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X-ray diffractometer
SmartLab 9 KW
Rigaku
Characterization of materials
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X-ray photoelectron spectrometer
ESCALAB 250 Xi spectrometer
Thermo Scientific
Characterization of materials
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Transmission Electron Microscope
Tecnai G2 Spirit TWIN
FEI
Acquisition of TEM images
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Environmental Scanning Electron Microscope
Quanta FEG 250
FEI
Acquisition of SEM images
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High-Resolution Transmission Electron Microscope
Talos F200X
FEI
Acquisition of EDS mapping images
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Fluorescence spectrophotomer
F-7000
Hitachi
Performance of photoluminescence spectra
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Fluorescence spectrophotomer
Horiba FL-3
HORIBA Scientific
Testing of time-resolved fluorescence results
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EPR spectrometer
EXMplus6-1
Bruker
Performance of electron spin resonance spectroscopy
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Ion chromatograph
DX-600
Dionex
Analysis of the liquid phase of the reaction system
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Electrochemical workstation
CHI760E
Performance of photocurrent measurements
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