Preparation and characterization of sol-gel derived Er-Yb codoped SiO<sub>2</sub>/TiO<sub>2</sub> core-shell nanoparticles期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Preparation and characterization of sol-gel derived Er-Yb codoped SiO₂/TiO₂ core-shell nanoparticles

Authors:	Shujie Pang Zuosen Shi Zhanchen Cui

Affiliation:	^a Key Lab of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, People's Republic of China ^b Chemistry and Chemical Engineer Department, DaQing Normal University, Central Street, Ranghulu District, Daqing 163712, People's Republic of China

Abstract:	The Er³⁺-Yb³⁺ codoped silica/titania core-shell nanoparticles were prepared by hydrolysis of titanium alkoxide precursors in the presence of lanthanide ions via sol-gel method. The structure of the particles was characterized by field emission scanning electron microscopy and transmission electron microscopy. The diameter of the silica core is about 50 nm. The thickness of the titania shell is about 4 nm. A typical doping density of Er³⁺ in the titania shell is 4.51 at.%, and the one of Yb³⁺ is 12.20 at.%. The UV-vis-NIR absorption spectra and the photoluminescence spectra were also investigated.

Keywords:	Nanomaterials Luminescence Sol-gel preparation Optical materials and properties
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