研究目的
Investigating the change from a type I heterostructure to a Z-scheme system in black/red phosphorus quantum dots for photocatalytic water splitting without sacrificial agents.
研究成果
The Z-scheme system of BP/RP-QD enables photocatalytic water splitting without sacrificial agents, offering a pathway to efficient solar water splitting systems. Future work will focus on inhibiting photocorrosion for stable overall water splitting.
研究不足
The oxidative degradation of BP/RP-QD under photocatalytic conditions limits the stability of the system.
1：Experimental Design and Method Selection:
A wet-chemistry route was used to fabricate BP/RP-QD through a reflux reaction of red phosphorus in ethylenediamine solvent.
2：Sample Selection and Data Sources:
The samples were characterized using TEM, XPS, Raman spectroscopy, XRD, TGA, UV-vis spectroscopy, UPS, and TAS.
3：List of Experimental Equipment and Materials:
Transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, X-ray diffraction (XRD), thermogravimetric analysis (TGA), UV-vis spectroscopy, UV photoelectron spectroscopy (UPS), and time-resolved transient absorption spectroscopy (TAS).
4：Experimental Procedures and Operational Workflow:
The synthesis involved a reflux reaction, centrifugation, and characterization using various spectroscopic and microscopic techniques.
5：Data Analysis Methods:
The data were analyzed to determine the energy band structures, electron transfer pathways, and photocatalytic activity.
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Transmission electron microscopy
Characterization of the morphology and size of BP/RP-QD
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X-ray photoelectron spectroscopy
Analysis of the chemical valence state of BP/RP-QD
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Raman spectroscopy
Confirmation of the phase compositions of BP/RP-QD
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X-ray diffraction
Characterization of the crystallinity of BP/RP-QD
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Thermogravimetric analysis
Determination of the weight percentage of black phosphorus in BP/RP-QD
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UV-vis spectroscopy
Measurement of the absorption spectra of BP-QD, RP-QD, and BP/RP-QD
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UV photoelectron spectroscopy
Resolution of the energy band structures of BP-QD and RP-QD
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Time-resolved transient absorption spectroscopy
Determination of the pathway of electron transfer
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