Mg/Al layered double hydroxide (LDH) was successfully synthesized at different pHs values. The Mg/AL LDH was well characterized by X-Ray diffraction and Fourier transform infrared analysis. The morphology of the LDH was observed using Scanning electron microscopy with energy dispersive X-ray spectroscopy. The influence of pH values on the morphology of the Mg/Al LDHs were studied. The result showed that the well-synthesized Mg/Al LDHs could be obtained when the pH value was about 10.0 at room temperature.
In the research, we show that suboxidic Ti7O13 and rutile TiO2 phases formed in addition to the general Ti3O5 phase when the sintering temperature was set at constant argon gas flow rate. Suboxidic Ti7O13 and rutile TiO2 phases were removed by tuning the flow rate of argon gas at constant sintering temperature. At the 1300°C temperature, the smallest Ti3O5 nanocrystals with a size of ~9 nm were produced. Flat shaped particles of Ti3O5 crystals were observed in SEM measurements.
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