title: Controllable synthesis and photoluminescence of single-crystalline BaHfO3 hollow micro- and nanospheres.
abstract: This paper presents a facile hydrothermal route to synthesize monodispersive and single-crystalline BaHfO(3) hollow micro- and nanospheres in a concentrated basic environment. The hollow spheres were size tunable from submicrometer to nanoscale by simply adjusting the base concentration at a suitable temperature. The base concentration played the key role on forming BaHfO(3) hollow spheres. Detailed investigations on base concentration, reaction temperature, and duration indicated that the formation of BaHfO(3) hollow spheres was driven by Ostwald ripening process. Because of the abundance of defects, the as-prepared BaHfO(3) hollow nanospheres exhibited a blue light emission under UV-light excitation at room temperature. Calcination led to the photoluminescence declination due to the decrease of defects.
authors.affiliation: Institute of Nanostructured Materials and Tianjin Key Laboratory of Fiber Modification and Functional Fiber, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin, China.
authors.forename: Tiannan
authors.initials: T
authors.lastname: Ye
authors.forename: Zhenghong
authors.initials: Z
authors.lastname: Dong
authors.forename: Yongnan
authors.initials: Y
authors.lastname: Zhao
authors.forename: Jianguo
authors.initials: J
authors.lastname: Yu
authors.forename: Fengqin
authors.initials: F
authors.lastname: Wang
authors.forename: Shukun
authors.initials: S
authors.lastname: Guo
authors.forename: Yongcun
authors.initials: Y
authors.lastname: Zou