研究目的
To develop visible-light responsive photocatalysts by site-selective loading of bimetallic nanoparticles of Au and Ag on titanium(IV) oxide (TiO2) to enhance photocatalytic activity under visible-light irradiation.
研究成果
The study successfully developed visible-light responsive photocatalysts by site-selective loading of Au and Ag nanoparticles on TiO2. The AuAg-loaded TiO2 showed superior photocatalytic activity and stability under visible-light irradiation. The different electron transfer mechanisms between rutile and anatase TiO2 were elucidated, providing insights for designing efficient photocatalysts.
研究不足
The study focuses on the photocatalytic activity under visible light and the stability of the photocatalysts, but the practical application under varying environmental conditions and scalability of the synthesis method are not extensively discussed.
1：Experimental Design and Method Selection:
Hydrothermal method for preparing morphology-controlled rutile and anatase TiO2, followed by photo-deposition for loading Au, Ag, and AuAg nanoparticles.
2：Sample Selection and Data Sources:
Rutile and anatase TiO2 samples prepared and characterized by XRD, STEM, EDS mapping, UV-Vis diffuse reflectance spectra, and XPS.
3：List of Experimental Equipment and Materials:
Titanium(IV) chloride, titanium(IV) ethoxide, HAuCl4, AgNO3, methanol, nitrogen gas, mercury lamp, LED light sources, and various filters.
4：Experimental Procedures and Operational Workflow:
Synthesis of TiO2, loading of noble metals, characterization, photocatalytic activity tests, and stability assessments.
5：Data Analysis Methods:
XRD for crystalline structure, STEM and EDS for morphology and elemental mapping, UV-Vis for optical properties, XPS for oxidation states, and gas chromatography for photocatalytic activity.
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