研究目的
To enhance the absorption of TiO2 in the visible light region and improve its photocatalytic activity by preparing black TiO2 with a crystalline core–disordered shell structure using sol–gel method combined with Mg reduction.
研究成果
The black TiO2 samples with a crystalline core–disordered shell structure were successfully prepared, showing enhanced optical absorption properties in the visible light region and improved photocatalytic hydrogen production under the full solar wavelength range of light.
研究不足
The study focuses on the preparation and characterization of black TiO2, with limited discussion on the scalability of the synthesis method and the long-term stability of the photocatalytic activity.
1：Experimental Design and Method Selection:
The black TiO2 was prepared by sol–gel method combined with a two-step calcination process.
2：Sample Selection and Data Sources:
Butyl titanate was used as titanium source.
3：List of Experimental Equipment and Materials:
X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM), Raman spectra, photoluminescence emission spectra, N2 adsorption–desorption, and ultraviolet–visible spectroscopy were used for characterization.
4：Experimental Procedures and Operational Workflow:
The xerogel was first calcined under air atmosphere and then calcined under nitrogen with reductant Mg.
5：Data Analysis Methods:
The specific surface area was calculated by the Brunauer–Emmett–Teller method, and the crystallite sizes were estimated using the Scherrer formula.
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