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- W2022201905 abstract "La 2 CuO 4 crystallites were prepared via a sol-gel process using lanthanum nitrate and cupric nitrate as raw materials, distilled water as solvent, citric acid as complexing agent and ammonia to control the pH value. The as-prepared La 2 CuO 4 crystallites were characterized by XRD, FESEM, TEM and UV-Vis spectra. Results show that the crystallization property of La 2 CuO 4 crystallites increases firstly and then decreases with increasing of the solution pH value from 1.0 to 2.5, but all of the samples exhibit single sphere-like morphology. It is found that when the solution pH value is controlled at 2.0, the grains display uniform distribution and the size ranges from 100nm to120nm after sintering at 600°C for 2 hours. The optical band gap of the as-prepared La 2 CuO 4 crystallites is calculated to be 1.38eV." @default.
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- W2022201905 date "2012-06-01" @default.
- W2022201905 modified "2023-10-16" @default.
- W2022201905 title "Effect of pH Value on Preparation of La<sub>2</sub>CuO<sub>4</sub> Microcrystallites Synthesized by Sol-Gel Process" @default.
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- W2022201905 doi "https://doi.org/10.4028/www.scientific.net/kem.512-515.231" @default.
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