Multifunctional Fe3O4@C@Ag hybrid nanoparticles: Aqueous solution preparation, characterization and photocatalytic activity

作者：Liang Hongxia; Niu Helin^*; Li Ping; Tao Zhiyin; Mao Changjie; Song Jiming; Zhang Shengyi

来源：Materials Research Bulletin, 2013, 48(7): 2415-2419.

DOI：10.1016/j.materresbull.2013.02.066

• Magnetic materials
• Chemical synthesis
• Electron microscopy
• Infrared spectroscopy
• Catalytic properties

The paper describes a kind of multifunctional Fe3O4@C@Ag hybrid nanoparticles, which can be successfully synthesized using a simple route based on directly adsorption and spontaneous reduction of silver ions onto the surface shell of carbon-coated magnetic nanoparticles. The as-prepared samples have been characterized by transmission electron microscopy (TEM), X-ray powder diffraction (XRD), Fourier transform infrared (FF-IR) spectrum, vibrating sample magnetometer (VSM) and UV-vis spectrum (UV-vis). The Ag nanocrystals loaded on the surface shell of carbon-coated magnetic nanoparticles are nearly spherical with an average diameter of 10 nm. And the carbonaceous polysaccharides shell obtained using an glucose hydrothermal reaction act as a role of a bridge between magnetic Fe3O4 core and noble metallic Ag nanocrystals. The as-prepared samples can be used as an effective catalyst for the photodegradation of organic dyes (neutral red) under the exposure of visible light. Results show that the as-prepared samples have a degradation rate of 93.7% for dyes within 30 min, which indicates their high-efficiency and rapid photocatalytic activity.

• 出版日期2013-7
• 单位安徽大学