Article Title

Hollow spherical rare-earth-doped yttrium oxysulfate: A novel structure for upconversion

Authors

Gen Chen, Department of Inorganic Materials, School of Resources Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China Department of Chemical Engineering, New Mexico State University, Las Cruces, New Mexico 88003, USA
Fashen Chen, Department of Inorganic Materials, School of Resources Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China
Xiaohe Liu, Department of Inorganic Materials, School of Resources Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China
Wei Ma, Department of Inorganic Materials, School of Resources Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China
Hongmei Luo, Department of Chemical Engineering, New Mexico State University, Las Cruces, New Mexico 88003, USA
Junhui Li, State Key Laboratory of High Performance Complex Manufacturing, School of Mechanical and Electronical Engineering, Central South University, Changsha, Hunan 410083, China
Renzhi Ma, International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan
Guanzhou Qiu, Department of Inorganic Materials, School of Resources Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China

Keywords

Y2O2SO4, Hollow sphere, Hydrothermal, Ostwald ripening, Upconversion

Abstract

A facile biomolecule-assisted hydrothermal route followed by calcination has been employed for the preparation of monoclinic yttrium oxysulfate hollow spheres doped with other rare-earth ions (Yb3+ and Eu3+ or Er3+). The formation of hollow spheres may involve Ostwald ripening. The resulting hybrid materials were used for upconversion applications. The host crystal structure allows the easy co-doping of two different rare-earth metal ions without significantly changing the host lattice. The luminescent properties were affected by the ratio and concentration of dopant rare-earth metal ions due to energy transfer and the symmetry of the crystal field. The type of luminescent center and the crystallinity of samples were also shown to have a significant influence on the optical properties of the as-prepared products.

Graphical Abstract

DOI

https://doi.org/10.1007/s12274-014-0472-5

Publisher

Tsinghua University Press

Recommended Citation

Gen Chen,Fashen Chen,Xiaohe Liu,Wei Ma,Hongmei Luo,Junhui Li,Renzhi Ma,Guanzhou Qiu, Hollow spherical rare-earth-doped yttrium oxysulfate: A novel structure for upconversion. NanoRes.2014, 7(8): 1093–1102