研究目的
To investigate the effect of annealing temperature on the shape and optical properties of MgO/ZnO nanocomposites synthesized through a simple reflux method.
研究成果
The morphology of MgO/ZnO nanocomposites changes from rod-shaped at 400 °C to spherical at 600 °C. The band gap increases with annealing temperature. The study demonstrates the influence of annealing temperature on the optical and structural properties of MgO/ZnO nanocomposites.
研究不足
The study is limited to the effects of annealing temperature on the morphology and optical properties of MgO/ZnO nanocomposites. Other factors such as precursor concentration and solvent type were not varied.
1：Experimental Design and Method Selection
MgO/ZnO nanocomposites were synthesized by mixing magnesium acetate tetrahydrate and zinc acetate in equimolar ratio through a simple reflux method. The samples were annealed at three different temperatures (400, 500, and 600 °C).
2：Sample Selection and Data Sources
Analytical grade magnesium acetate tetrahydrate and zinc acetate were used as starting materials. Ethanol was used as a solvent, and acetic acid was used as a gelling agent.
3：List of Experimental Equipment and Materials
X-ray diffractometer (XRD) with CuKα radiation, FEI Quanta FEG 200 high resolution scanning electron microscope (HRSEM), TG/DTA, Varian Cary 5E spectrophotometer for UV-visible absorption spectra, Perkin-Elmer lambda 900 spectrophotometer for photoluminescence spectra.
4：Experimental Procedures and Operational Workflow
The solution was refluxed at 90 °C for 1 h, dried at 90 °C for 6 h, and annealed at 400, 500, and 600 °C for 2 h. The samples were characterized using XRD, HRSEM, TG/DTA, UV-visible, and photoluminescence spectra.
5：Data Analysis Methods
Williamson-Hall plot was used to study particle size and micro strain. Band gap was calculated using the Tauc relation from UV-visible absorption spectra.
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