研究目的
Investigating the enhancement of photocatalytic hydrogen generation performance through the decoration of urchin-like TiO2 structures with lanthanide-doped Bi2S3 quantum dots.
研究成果
The study concludes that decorating TiO2 with Yb-doped Bi2S3 QDs significantly enhances photocatalytic hydrogen generation, with the highest activity observed at 10 mol% Yb doping. The presence of Yb3+ ions in the Bi2S3 lattice reduces the bandgap and facilitates charge transport, improving photocatalytic efficiency.
研究不足
The study is limited by the potential instability of sulphides during photocatalytic reactions due to photocorrosion and the need for optimal sacrificial agents to inhibit this process.
1：Experimental Design and Method Selection:
The study involved the synthesis of urchin-like TiO2 structures decorated with pristine and Er- or Yb-doped Bi2S3 QDs. The methodology included solvothermal synthesis for TiO2 and Bi2S3 QDs, followed by physical adsorption for composite formation.
2：Sample Selection and Data Sources:
Samples were prepared with varying QD loadings (1–20 wt%) and doping degrees (1–15 mol%).
3：List of Experimental Equipment and Materials:
Instruments included FE-SEM, TEM, UV-vis spectrophotometer, pXRD, XPS, and PL spectrophotometer. Materials included Ti(IV) butoxide, Bi(NO3)3·5 H2O, Er(NO3)3·5 H2O, Yb(NO3)3·5 H2O, and Na2S2O3·5 H2O.
4：2O. Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The synthesis involved hydrothermal preparation of TiO2, solvothermal synthesis of Bi2S3 QDs, and their combination via physical adsorption. Photocatalytic activity was measured under UV-vis and visible-light irradiation.
5：Data Analysis Methods:
Data were analyzed using HighScore Plus for pXRD, and photocatalytic activity was assessed based on hydrogen evolution rates.
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