研究目的
Investigating the alcohol-induced synthesis of photocatalytic TiO2 with controlled hierarchical structure for enhanced photocatalytic activity.
研究成果
Hierarchical TiO2 structures synthesized via a solvothermal method exhibit superior photocatalytic activity due to their unique structures and large light-harvesting efficiency. The optimized volume ratio of ethanol to glycerol is 20:15, demonstrating the potential for designing materials with high photocatalytic activity.
研究不足
The study focuses on the synthesis and photocatalytic activity of TiO2 under UV-light irradiation, with limited exploration of visible-light photocatalytic activity or the scalability of the synthesis method.
1：Experimental Design and Method Selection:
A solvothermal method was used to synthesize hierarchical TiO2 structures by adjusting the volume ratio of glycerol to ethanol.
2：Sample Selection and Data Sources:
Tetrabutyl titanate (TBT), absolute ethyl alcohol, and glycerol were used as starting materials.
3：List of Experimental Equipment and Materials:
A 50 mL Teflon pot, stainless steel autoclave, Muffle furnace, X-ray powder diffractometer (XD-3), field emission scanning electron microscope (Hitachi S-4800), transmission electron microscope (JEM-2100), Raman spectrometer (in Via-Reflex), Fourier transform infrared spectrometer (Nicolet IR-76 200), X-ray photoelectron spectroscopy (ESCALAB 250 US Thermo Electron Co.), UV–Vis spectrophotometer (U-4100), and fluorescence spectrophotometer (Hitachi F-4500).
4：0). Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The solvothermal reaction was conducted at 170°C for 24 h, followed by washing, drying, and calcination.
5：Data Analysis Methods:
XRD, SEM, TEM, HRTEM, Raman spectroscopy, FTIR, XPS, UV–Vis, and PL spectra were used for characterization.
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X-ray photoelectron spectroscopy
ESCALAB 250 US
Thermo Electron Co.
Elemental composition and valence states analysis
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Fluorescence spectrophotometer
Hitachi F-4500
Hitachi
Photoluminescence spectra measurement
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Field emission scanning electron microscope
Hitachi S-4800
Hitachi
Morphology characterization
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Transmission electron microscope
JEM-2100
JEOL
Detailed morphology and structure examination
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Tetrabutyl titanate
TBT
Starting material for the synthesis of TiO2
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Absolute ethyl alcohol
Solvent in the solvothermal process
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Glycerol
Solvent in the solvothermal process
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Teflon pot
50 mL
Container for the solvothermal reaction
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Stainless steel autoclave
Reactor for the solvothermal process
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Muffle furnace
Used for calcination of the samples
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X-ray powder diffractometer
XD-3
Characterization of crystal phase
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Raman spectrometer
in Via-Reflex
Characterization of crystalline structure
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Fourier transform infrared spectrometer
Nicolet IR-76 200
Nicolet
Analysis of functional groups
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UV–Vis spectrophotometer
U-4100
Light absorption property determination
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