Effect of solution pH value changes on fluorescence intensity of magnetic-luminescent Fe3O4@Gd2O3：Eu3＋ nanoparticles

• Published in: Journal of rare earths Vol. 34; no. 1; pp. 71 - 76
• Main Author: 吴拓 潘桦滟 陈如标 罗东 张宏 沈晔 李旸晖 王乐
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 2016
• Subjects: luminescence properties; magnetic properties; nanocomposites; pH value; rare earths; 光致发光; 溶液pH值; 磁性; 纳米复合材料; 纳米颗粒; 荧光强度; 铁氧化; 饱和磁化强度; pH value; magnetic properties; nanocomposites; luminescence properties; rare earths
• ISSN: 1002-0721; 2509-4963
• DOI: 10.1016/S1002-0721(14)60581-0

In this paper, bifunctional Fe3O4@Gd203：Eu3＋ core-shell nanoparticles with both magnetic and fluorescent properties were synthesized through a urea homogeneous precipitation （UHP） method. Particular emphasis was placed on investigating the influence of the solution pH value on the photoluminescence of the core-shell nanocomposites. It showed that the samples treated at the solution of pH=3.0 had the highest luminescence due to the enhanced crystallinity and size tmiformity of nanoparticles. The Fe3O4@Gd2O3：Eu3＋ nanocomposites exhibited an almost spherical shape with a mean diameter of 60 nm, and had strong red emissions of Eu3＋ at 612 nm as well as good magnetization with the saturation magnetization of 1.29 emu/g. It thus indicated that the core-shell nanocomposites investigated has great potential in biomedical applications.