Growth Mechanism,Modified Morphology and Optical Properties of Coral-like BaTiO3Architecture through CTAB Assisted Synthesis

• Published in: 材料科学技术学报：英文版 2015 (2), p.223-228
• Main Author: Pengjun Zhao Lei Wang Liang Bian Jinbao Xu Aimin Chang Xinqian Xiong Fanglong Xu Jiaqi Zhang
• Format: Article
• Language: English
• Subjects: BaTiO3; Halogen; doping; Hydrothermal; synthesis; Coral
• ISSN: 1005-0302; 1941-1162

Three-dimensional hierarchical structure coral-like BaTiO3 nanoparticles have been self-assembled by a facile one step hydrothermal method. Cetyltrimethyl ammonium bromide(CTAB),Ba(OH)2·8H2O and tetrabutyl titanate have been used as precursors. The prepared Ba TiO3 exhibits cubic perovskite phase at room temperature,and the coral-like architecture is a micro-nano hiberarchy consisted of dendrimer-like structure and trunk-like structure. By adjusting the hydrothermal duration and the precursor substances,a surfactant induced mechanism is proposed to understand the self-assembly process. UV-vis measurement demonstrates that the as-prepared Ba TiO3 nanoparticles exhibit dozens of times overwhelming absorptive character compared to the ordinary nanospheres at ultraviolet band,which is benefited from the coral-like porous framework. Moreover,halogen anions( F,Cl,Br,and I) have been chosen to adjust the coral-like Ba TiO3 physical properties. Results show the halogen doping produces distinct modulation effect on the grain size,UV-vis absorbance and photoluminescence properties of the materials. The coral-like BaTiO3 nanoparticle and its halogen modified ramifications offer significant opportunities to develop nano-laser devices,photon detectors,photocatalyst based on BaTiO3 perovskite materials.