研究目的
Investigating the enhancement of upconversion luminescence in self-assembled BiOBr: Yb3+/Er3+ 3D hierarchical architectures and their application in NIR photocatalysis.
研究成果
The 3D flower-like BiOBr: Yb3+/Er3+ HAs synthesized via hydrothermal method showed significant enhancement in UC emission and photocatalytic activity under NIR light. The enhancement is attributed to improved internal electric field effects and efficient utilization of UC emissions. This work provides insights into the fabrication of efficient self-assembled 3D flower-like BiOBr: Yb3+/Er3+ HAs UC materials for NIR-activated photocatalysts.
研究不足
The study focuses on the effect of pH on the morphology and luminescence properties of BiOBr: Yb3+/Er3+ HAs. The exact growth mechanism and the potential for further optimization of photocatalytic activity under NIR light are areas for future research.
1：Experimental Design and Method Selection:
Hydrothermal method was used to synthesize self-assembled Yb3+/Er3+ co-doped BiOBr 3D flower-like hierarchical architectures (HAs). The pH values were adjusted to control the thickness and morphology of the samples.
2：Sample Selection and Data Sources:
Samples were synthesized with different pH values (2, 4, and 6) to study the effect of pH on morphology and luminescence properties.
3：List of Experimental Equipment and Materials:
XRD for phase identification, SEM and TEM for morphology characterization, UV-Vis absorption spectra for optical properties, and photoluminescence spectra for luminescence properties.
4：Experimental Procedures and Operational Workflow:
Samples were characterized for their structural, morphological, and optical properties. Photocatalytic activity was evaluated by monitoring the degradation of RhB under NIR and simulated solar light irradiation.
5：Data Analysis Methods:
The UC emission spectra were analyzed to understand the enhancement mechanisms. Photocatalytic degradation rates were calculated using pseudo-first-order kinetics.
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