Surfactant-free microwave-assisted hydrothermal synthesis of BaMoO4 hierarchical self-assemblies and

• 作 者: Yun-fei Liu Li-li Xia Yi-nong Lu Shen-hua Dai Masaki Takeguchi Hui-min Hong Pan Zhigang
• 机 构: College of Materials Science and Engineering,Nanjing University of Technology,Nanjing210009,China
• 出 处: 2012江苏新材料青年学术论坛
• 发表日期: 2012年9期
• 关键词: BaMoO4 Microwave-assisted hydrothermal Morphological evolution Self-assembly Sup

　　BaMoO4 with 3D hierarchical multilayer disc-like and nest-like architectures self-assembled from 2D nano-sheets were successfully synthesized via a microwave-assisted hydrothermal route without any surfactant.The as-prepared products were characterized by X-ray powder diffractometer (XRD),scanning electron microscope (SEM),field emission transmission electron microscope (FE-TEM) and photoluminescence (PL) spectrometer.The results show that the reaction parameters,including pH value,reactant concentration,and molar ratio of[Ba2+]/[MoO42-],played important roles on the morphologies of the final products.And the formation mechanism of 3D hierarchical architectures is a stepwise oriented aggregation-based self-assembly process.The superstructure characteristic of 3D nest-like BaMoO4 architecture was observed in HRTEM image and the corresponding Fast Fourier Transform (FFT) for the first time,and the superlattice reflections with non-integer indices occurred around the subcell reflections at±1/6(2a*+2c*).Room-temperature photoluminescence spectra of 3D BaMoO4 architectures reveal a strong and broad blue emission,and the 3D nest-like architectures own the enhanced intensity than multilayer discs.