研究目的
To investigate the effects of Pt-loading on the formation and photocatalytic activity of bismuth titanate under visible light irradiation, specifically focusing on the degradation of Methylene Blue (MB).
研究成果
The study demonstrated that Pt-loading enhances the photocatalytic activity of TiO2-Bi2O3 under visible light by restricting the recombination of photo-induced electron-hole pairs and promoting the crystallization of bismuth titanate. Optimal Pt and TiO2 contents were identified for maximum MB degradation efficiency.
研究不足
The study focused on specific ranges of Pt and TiO2 contents, and the photocatalytic activity was evaluated only under visible light irradiation for MB degradation. The effects of other variables or pollutants were not explored.
1：Experimental Design and Method Selection:
The study involved preparing Pt/TiO2-Bi2O3 catalysts by impregnating Pt on sol-gel derived TiO2-Bi2O3 to enhance photocatalytic activity under visible light.
2：Sample Selection and Data Sources:
TiO2-Bi2O3 samples were prepared with varying TiO2 and Pt contents.
3：List of Experimental Equipment and Materials:
Included bismuth (III) nitrate pentahydrate, titanium tetraisopropoxide, 2-methoxyethanol, 2-propanol, and hexachloroplatinic (IV) acid hexahydrate.
4：Experimental Procedures and Operational Workflow:
The sol-gel method was used for sample preparation, followed by drying and calcination. Pt was loaded via impregnation.
5：Data Analysis Methods:
Characterization involved N2 adsorption-desorption, XRD, UV-visible spectroscopy, and PL spectroscopy. Photocatalytic activity was assessed by MB degradation under visible light.
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