研究目的
Investigating the enhancement of photocatalytic hydrogen evolution activity and stability of CdS nanorods by coating with boron nitride shells.
研究成果
The CdS@BN core-shell nanorods exhibited significantly enhanced photocatalytic hydrogen evolution activity and stability under visible-light irradiation, with the optimal performance achieved by CdS NRs coated with 5 wt% BN. The close interfacial contact between the CdS core and the BN shell facilitated the separation and transfer of photogenerated electron-hole pairs, leading to improved photocatalytic performance.
研究不足
The study focuses on the enhancement of photocatalytic hydrogen evolution activity and stability but does not explore the scalability of the synthesis method or the economic feasibility of the photocatalysts for large-scale applications.
1：Experimental Design and Method Selection:
Core-shell CdS@BN NRs were synthesized via a solvothermal and chemical adsorption self-assembly method.
2：Sample Selection and Data Sources:
CdS NRs were synthesized using a solvothermal method, and BN powder was used for coating.
3：List of Experimental Equipment and Materials:
Teflon-lined stainless-steel autoclave, XRD, TEM, UV-vis spectrophotometer, XPS, BET method, PL spectrofluorometer, CHI 660E electrochemical work station, sealed cylindrical quartz tank, 300 W Xe lamp.
4：Experimental Procedures and Operational Workflow:
CdS NRs were synthesized and then coated with BN via chemical adsorption. The photocatalytic hydrogen evolution reactions were conducted under visible-light irradiation.
5：Data Analysis Methods:
The amount of produced hydrogen was analyzed by an on-line GC, and the apparent quantum efficiency was determined with excitation at 420 nm.
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Transmission electron microscope (TEM)
JEM-2010
JEOL
Used to investigate the fine microstructures of bare CdS NRs and CBN5.
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UV-vis spectrophotometer
UV-2401
Shimadzu
Used to detect the absorbance of photocatalysts at wavelength of 200–800 nm.
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X-ray photoelectron spectroscope (XPS)
Escalab 250
ThermoFisher
Used to measure the chemical compositions of CBN5.
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Shimadzu RF-5301PC spectrofluorometer
RF-5301PC
Shimadzu
Used to record photoluminescence spectra (PL) of the photocatalysts.
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CHI 660E electrochemical work station
660E
CHI
Used to test the transient photocurrent responses (I-t curves) and electrochemical impedance spectroscopy (EIS).
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BN powder
Shanghai Titan Technology Co., Ltd
Used as a coating material for CdS NRs to form core-shell photocatalysts.
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Teflon-lined stainless-steel autoclave
Used for the solvothermal synthesis of CdS NRs.
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X-ray diffraction (XRD)
Used to determine the crystalline structures of the samples.
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Brunauer-Emmett-Teller (BET) method
ASAP 2010
Used to determine the surface areas and pore structures of bare CdS NRs and CBN5.
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Xe lamp
300 W
Bjnbet Company
Used as the visible light source for photocatalytic hydrogen evolution experiments.
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