Urchin-like m-LaVO4 and m-LaVO4/Ag microspheres: Synthesis and characterization

作者：Chen Limiao^*; Wu Min; Wang Dan; Zhou Le; Yu Na; Zhang Peisen; Huang Jianhan; Liu Xiaohe; Qiu Guanzhou

来源：Materials Characterization, 2014, 98: 162-167.

DOI：10.1016/j.matchar.2014.10.021

• LaVO4
• Hydrothermal synthesis
• Microsphere
• Photocatalytic activity
• Methyl orange

The semiconductor nanostructures decorated with noble metals have attracted increasing attention due to their interesting physical and chemical properties. In this work, urchin-like monoclinic (m-) LaVO(4)microspheres were prepared by a hydrothermal method and used as a template to fabricate Ag nanoparticle-decorated m-LaVO4 composites. The morphology and structure were characterized by transmission electron microscope, high-resolution transmission electron microscope, scanning electron microscope, and energy-dispersive X-ray. It was found that Ag nanoparticles with narrow size distribution were uniformly loaded on urchin-like m-LaVO4 microspheres, and the resulted composite microspheres showed distinct surface plasmon absorption band compared to pure m-LaVO4 microspheres. Photocatalytic activities of as-prepared samples were examined by studying the degradation of methyl orange solutions under visible-light irradiation (>400 nm). Results clearly showed that urchin-like m-LaVO4/Ag microspheres possess much higher photocatalytic activity than pure m-LaVO4 microspheres and P25.

• 出版日期2014-12
• 单位中南大学