研究目的
Investigating the enhancement of photocatalytic performance of hexagonal CdS single crystals through facet engineering for water splitting.
研究成果
The facet-junction engineered hexagonal CdS single crystals exhibit highly efficient photocatalytic H2 evolution and unprecedented photostability, attributed to the type-II band alignment between co-exposed {0001} and {10 0} facets and the presence of sulfur vacancies. This work presents a novel strategy for designing efficient and stable photocatalysts for water splitting.
研究不足
The study focuses on the photocatalytic performance under specific conditions and does not explore the scalability of the synthesis method or the economic feasibility of large-scale application.
1：Experimental Design and Method Selection:
Hydrothermal synthesis was used to prepare hexagonal CdS single crystals with different exposed facets by adjusting the molar ratio of S2-/Cd2+ precursors.
2：Sample Selection and Data Sources:
CdS samples were prepared with varying S/Cd molar ratios (1:1 to 1:7) and characterized for their photocatalytic performance.
3：List of Experimental Equipment and Materials:
Equipment included a hydrothermal reactor, SEM, TEM, XRD, XPS, UV-vis DRS, PL spectrometer, and photoelectrochemical measurement setup. Materials included Cd(NO3)2·4H2O and Na2S·9H2O.
4：2O. Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The synthesis involved hydrothermal reaction at 200°C for 20 h, followed by characterization and photocatalytic activity testing under visible light irradiation.
5：Data Analysis Methods:
Photocatalytic activity was evaluated by measuring H2 production rates, and material properties were analyzed using various spectroscopic and microscopic techniques.
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