Low-temperature Synthesis of Highly Crystalline BaxSr1-xTiO3 Nanoparticles in Aqueous Medium

Bulletin of the Korean chemical society

Yong Joo Kim¹  Wan In Lee¹  Sher Bahadur Rawal¹  Sang Do Sung¹ 

关键词: Barium strontium titanate;    Nanoparticles;    Tetrametylammonium hydroxide;    Sol-gel;    Low-temperature synthesis;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

We report the synthesis of SrTiO3, BaTiO3 and BaxSr1-xTiO3 (BST) nanoparticles (NPs) in various compositions (x = 0.25, 0.5 and 0.75) by an inorganic sol-gel method under a basic condition. Highly crystalline nanoparticles were formed at the reaction temperature of 25 - 100 oC from a stabilized titanium alkoxide in tetramethylammonium hydroxide (TMAH) and barium or strontium acetate in aqueous solution. Morphology and particle structure of the synthesized BST NPs were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and transmission electron microscopy (TEM). The BST nanoparticles in various compositions were monodispersed without mutual aggregation, and their average sizes were in the range of 70 - 80 nm. Furthermore, they showed highly crystallized perovskite phase over the whole composition range from SrTiO3 to BaTiO3. We also proposed a mechanism for the low-temperature formation of BST NPs.

【 授权许可】

Unknown