研究目的
To investigate the photocatalytic activity of bimetallic PtNi/g-C3N4 nanotubes for hydrogen evolution under visible light irradiation and to explore the potential of bimetallic PtNi as a cocatalyst to replace Pt for better performance and lower cost.
研究成果
Bimetallic PtNi/g-C3N4 nanotubes exhibit enhanced photocatalytic activity for hydrogen evolution under visible light irradiation, with Pt1Ni1/g-C3N4 showing the highest performance. The study demonstrates the potential of bimetallic PtNi as a cost-effective alternative to Pt cocatalysts, with efficient charge separation and transfer mechanisms contributing to the improved photocatalytic performance.
研究不足
The study focuses on the photocatalytic activity under visible light irradiation and the use of TEOA as a sacrificial agent, which may not fully represent conditions for practical applications. The scalability and cost-effectiveness of the synthesis method for large-scale production were not addressed.
1：Experimental Design and Method Selection:
The study involved the synthesis of bimetallic PtNi/g-C3N4 nanotubes through calcination and chemical co-reduction, followed by characterization and photocatalytic activity evaluation.
2：Sample Selection and Data Sources:
Urea and thiourea were used as precursors for g-C3N4 nanotubes, with Pluronic F127 as a template. Bimetallic PtNi NPs were deposited via chemical reduction.
3：List of Experimental Equipment and Materials:
Equipment included a muffle furnace, XRD, SEM, TEM, XPS, UV-vis DRS, PL spectrometer, and a photocatalytic reaction system. Materials included urea, thiourea, Pluronic F127, H2PtCl6, NiCl2, and NaBH
4：Experimental Procedures and Operational Workflow:
The synthesis involved calcination of the precursor mixture, followed by deposition of PtNi NPs. Photocatalytic activity was evaluated under visible light irradiation using a TEOA aqueous solution.
5：Data Analysis Methods:
The photocatalytic performance was analyzed based on H2 generation rates, and the mechanism was investigated through photoelectrochemical and PL measurements.
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UV-vis diffuse reflectance spectra
UV-2450
SHIMADZU
Used to record DRS of the samples.
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Fourier transform infrared spectrometer
VERTEX 70
BRUKER
Used to record FT-IR spectra of the samples.
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Inductively coupled plasma-optical emission spectrometer
730
Agilent
Used to measure the contents of Pt and Ni in Pt1Ni1/g-C3N4 nanotubes.
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Transmission electron microscope
JEM-2100
JEOL
Used to take TEM images of the samples.
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X-ray photoelectron spectroscopy
AXIS Ultra DLD
Kratos
Used for XPS measurements to analyze the composition of the samples.
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X-ray diffractometer
DX-2700X
Dandong Fangyuan Instrument Co. Ltd.
Used for XRD measurements to analyze the crystal structure of the samples.
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Field emission scanning electron microscopy
GEMINI ULTRA 55
Used to capture SEM images of the samples.
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Nitrogen adsorption-desorption isotherms
ASAP 2020
Micromeritics
Used to obtain nitrogen adsorption-desorption isotherms of the samples.
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Fluorescence spectrometer
PE-LS45
Used to obtain PL spectra of the samples.
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Elemental analyzer
Vario MICRO CUBE
Used to analyze the content of S in g-C3N4 nanotubes.
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Water splitting system
Lab-solar-H2
Beijing Perfect Light Technology Co., Ltd.
Used to evaluate the photocatalytic activity of PtNi/g-C3N4 nanotubes for H2 production.
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Xenon lamp
PLS-SXE300
Used as a light source for photocatalytic experiments.
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Optical Power/Energy Meter
842-PE
Newport
Used to measure the light intensity.
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Gas chromatography
GC9800
Shanghai Kechuang Chromatography Instrument Co., Ltd.
Used to analyze the evolved H2.
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Electrochemical workstation
CHI660E
Used for photoelectrochemical measurements.
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