研究目的
To design and fabricate a high-performance photocatalyst for hydrogen evolution by coupling tiny NiCoP nanoparticles with g-C3N4 through an in-situ growth strategy to enhance charge separation and transfer.
研究成果
The NiCoP/g-C3N4 nanohybrids with uniformly distributed 5 nm NiCoP nanoparticles exhibit significantly enhanced photocatalytic hydrogen evolution activity compared to pristine g-C3N4 and other phosphide cocatalysts. The in-situ fabrication strategy effectively eliminates the light screening effect and improves charge transfer, demonstrating the potential of transition metal phosphides as noble-metal-free cocatalysts for hydrogen production.
研究不足
The study focuses on the photocatalytic hydrogen evolution under UV-Vis light, and the scalability of the synthesis method for industrial applications is not discussed. The long-term stability under continuous operation needs further investigation.
1：Experimental Design and Method Selection:
The study employed an in-situ growth strategy to fabricate NiCoP/g-C3N4 nanohybrids via a controllable alcohothermal process.
2：Sample Selection and Data Sources:
Bulk g-C3N4 was synthesized from urea precursor, and NiCoP nanoparticles were coupled with g-C3N4 through an alcohothermal method followed by thermal phosphidation.
3：List of Experimental Equipment and Materials:
Instruments included XRD, XPS, SEM, TEM, UV-Vis spectrophotometer, PL spectrometer, and TGA analyzer. Chemicals were purchased from Shanghai Aladdin Ltd.
4：Experimental Procedures and Operational Workflow:
Detailed steps included synthesis of g-C3N4, NiCo-OH/g-C3N4, and NiCoP/g-C3N4, followed by characterization and photocatalytic evaluation.
5：Data Analysis Methods:
Photocatalytic activities were assessed by hydrogen generation rates under UV-Vis light, and electrochemical properties were tested using a three-electrode cell.
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UV-Vis diffuse reflectance spectra
PerkinElmer Lambda 750
PerkinElmer
Optical property analysis
-
Photoluminescence spectrum
Hitachi F-4600
Hitachi
Charge carrier recombination analysis
-
X-ray diffraction
Rigaku SmartLab
Rigaku
Characterization of crystal structure
-
X-ray photoelectron spectra
Thermo Fisher Scientific ESCALAB 250Xi
Thermo Fisher Scientific
Surface chemical composition analysis
-
Scanning electron microscopy
FEI Verios 460L
FEI
Surface morphology imaging
-
Transmission electron microscopy
JEOL JEM-3010
JEOL
Nanostructure imaging and analysis
-
Thermogravimetric analysis
TA SDT Q600
TA Instruments
Thermal stability analysis
-
Gas chromatograph
Techcomp GC7900
Techcomp
Hydrogen evolution analysis
-
Electrochemical workstation
Chenhua CHI 760E
Chenhua
Electrochemical property analysis
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