研究目的
To develop stable and efficient hydrogen-evolving photocatalysts for solving the energy crisis and environment pollution through photocatalytic water splitting.
研究成果
The study successfully developed a novel nitrogen-doped carbon layers coated cobalt nanoparticles (Co@NC) as an efficient cocatalyst for photocatalytic water splitting. The Co@NC coupled with CdS exhibited excellent photocatalytic performance, with a hydrogen evolution activity of 21.8 mmol g-1 h-1 for CdS with 3 wt % loading amount of Co@NC, which is 29.8 times higher than that of CdS alone. The enhanced photocatalytic performance is attributed to the effective electron transfer between the CdS NRs and Co@NC, confirmed by electrochemical experiments and PL spectra. This work provides a new method to synthesize universal photocatalytic cocatalyst.
研究不足
The study focuses on the photocatalytic hydrogen evolution performance of CdS with Co@NC cocatalyst under specific conditions. The scalability and practical application of the synthesized photocatalyst in large-scale photolysis of water are not discussed.
1：Experimental Design and Method Selection:
The study involves the synthesis of Co@NC from carbon quantum dots (CQDs) and Co2+ as a cocatalyst loaded on CdS nanorods (NRs) for photocatalytic hydrogen production.
2：Sample Selection and Data Sources:
CdS NRs were prepared by dissolving cadmium nitrate and thiourea in ethylenediamine, followed by hydrothermal treatment.
3：List of Experimental Equipment and Materials:
Materials include glucose, dicyandiamide, Co(NO3)2·6H2O, cadmium nitrate, thiourea, ethylenediamine, and others. Equipment includes Teflon autoclave, XRD, SEM, TEM, UV–vis DRS, PL spectrometer, etc.
4：Experimental Procedures and Operational Workflow:
The process involves synthesis of CQDs, preparation of Co@NC, synthesis of CdS NRs, and preparation of CdS/Co@NC hybrid photocatalyst.
5：Data Analysis Methods:
The photocatalytic performance was evaluated by hydrogen evolution rate, AQE calculation, and TOF calculation. Electrochemical and photoelectrochemical measurements were performed to confirm the electron transfer between CdS NRs and Co@NC.
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