Mineralization and optical properties of Eu3+-doped tricalcium silicate soaked in dilute K2HPO4 aqueous solution

作者：Dai, Ruiqi; Tong, Chao; Zhu, Yangguang; Xu, Chuanyan; Yang, Lei; Li, Yadong^*

来源：Optical Materials, 2018, 85: 32-40.

DOI：10.1016/j.optmat.2018.08.013

• Tricalcium silicate
• Eu doping
• Mineralization
• Optical properties

Eu3+-doped tricalcium silicate (Ca3SiO5) was synthesized by two-step precipitation and combinated calcination method. The samples were investigated before and after soaking in dilute K2HPO4 aqueous solution for different times using X-ray diffraction method (XRD), scanning electron microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR) and X-ray energy-dispersive spectra (EDS). The optical properties of as-prepared and mineralized samples were evaluated using luminescence spectroscopy respectively. The results showed that, with prolonged soaking time, Eu3+-doped tricalcium silicate gradually transformed into hydroxyapatite and showed good bioactivity. Meanwhile, the luminescence intensity of Eu3+ ion gradually decreased; the intensity ratio between electric dipole transition (D-5(0)-> F-7(2)) and magnetic dipole transition (D-5(0)-> F-7(1)) increased; the emitting color of mineralized samples under UV-lamp and its CIE coordinates changed from orange-red to deep-violet. These phenomena revealed that the mineralization of Eu3+-doped Ca3SiO5 can be monitored through the evolution of optical properties with prolonged soaking time.

• 出版日期2018-11
• 单位苏州大学