Hydrothermal synthesis of Litchi‐like SrTiO3 with the help of ethylene glycol

Templated by TiO2 microspheres, litchi‐like SrTiO3 crystals with a narrow size distribution and monodispersity were synthesized through the combination of regulating the ethylene glycol concentration during the hydrothermal process and the post heat treatment. The results show that when the volume ratio of water and ethylene glycol reached 10:70, microsized SrCO3 was firstly formed under the hydrothermal process, and then the litchi‐like SrTiO3 powder was obtained after the postheat treatment at 700°C for 4 hours, which shows a large specific surface area of 37.41 m2/g. It is found that the concentration of ethylene glycol aqueous solution plays an important role on the morphology of the SrTiO3 crystals, and the slightly higher viscosity and proper amount of OH hydroxyl groups facilitate the formation of the micrometer spherical hierarchical surface. Litchi‐like SrTiO3 crystals transformed from TiO2 spherical template have been modulated effectly through regulating the concentration of ethylene glycol aqueous solution and heat treatment.