研究目的
Investigation of the fabrication and optical characterization of PbWO4 nanocrystals from mechanical alloying process.
研究成果
Single-phase PbWO4 nanocrystals with a Scheelite structure were successfully fabricated. The nanocrystals exhibited a particle size range of 3–10 nm and a direct band gap of 3.82 eV, indicating potential applications in optoelectronic devices and radiation detectors.
研究不足
The study is limited to the synthesis and optical characterization of PbWO4 nanocrystals, with potential areas for optimization in the mechanical alloying process and further exploration of applications.
1：Experimental Design and Method Selection:
The study used mechanical alloying in atmospheric conditions with PbO and WO3 as starting materials.
2：Sample Selection and Data Sources:
Stoichiometric amounts of PbO and WO3 were used in a 1:1 molar ratio.
3：List of Experimental Equipment and Materials:
SPEX ball milling machine, stainless steel vial, steel balls, XRD (D8 BRUKER ADVANCE), HRTEM (JEOL 2100F), UV–Vis-NIR spectroscopy (Lambda 750).
4：0). Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: Powders were milled for 30 hours, phase evolution was detected by XRD, microstructure was analyzed by HRTEM, and optical properties were measured.
5：Data Analysis Methods:
Scherrer’s formula was used for crystallite size determination, and Tauc plot was used for band gap estimation.
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