研究目的
Investigating the enhanced photocatalytic performance of carbon nanotubes-wrapped urchin-like Bi2S3 composites under visible light.
研究成果
The Bi2S3 urchin/CNTs composites show obviously superior photocatalytic activity for the photodegradation of MO under visible light. A hierarchically urchin-like morphology provides enough active sites and CNTs suppress recombination of the electrons–holes in the nanocomposites.
研究不足
The decrease in activity with higher CNTs amount in composite catalyst could be attributed to photon scattering caused by surplus carbon in the photoreaction system.
1：Experimental Design and Method Selection:
The synthesis of Bi2S3 urchin/CNTs was carried out using a microwave method.
2：Sample Selection and Data Sources:
Bismuth nitrate, polyethylene glycol 4000, acid-treated CNTs, and thiourea were used as precursors.
3：List of Experimental Equipment and Materials:
X-ray diffraction (XRD; D5000), Scanning electron microscopy (SEM; S4800), a transmission electron microscope (TEM, JSM-6700F), energy dispersive X-ray spectroscopy (EDS; JSM-6700F), Raman spectroscopy (J-Y, T6400), Fourier transform infrared spectra (TTIR, WQF-410), and UV-Vis diffused reflectance spectra (UV-2550).
4：0). Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The blended suspension was heated in the microwave, filtered, washed, and dried.
5：Data Analysis Methods:
The photocatalytic performance was studied by the degradation of methyl orange (MO) under visible light.
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X-ray diffraction
D5000
Characterization of the obtained photocatalysts
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Scanning electron microscopy
S4800
Morphology analysis of Bi2S3 urchin/CNTs composites
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Transmission electron microscope
JSM-6700F
Morphology analysis of Bi2S3 urchin/CNTs composites
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Energy dispersive X-ray spectroscopy
JSM-6700F
Compositional analysis of the samples
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Raman spectroscopy
J-Y, T6400
Quality study of the samples
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Fourier transform infrared spectra
WQF-410
Quality study of the samples
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UV-Vis diffused reflectance spectra
UV-2550
Quality study of the samples
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