Microwave Hydrothermal Synthesis of Hexagonal NaYF4 and Yb3+,Er3+-doped NaYF4 Microtubes

doi:10.3724/sp.j.1077.2009.00553

Abstract

Abstract: NaYF₄and ^Yb3+,Er³⁺doped NaYF₄ (NaYF₄∶Yb³⁺,Er³⁺) microtubes with a hexagonal structure were prepared by a simple microwave hydrothermal method at a relatively low temperature in a short period of time without using toxic trifluoroacetic acid. The starting reagents used in the preparation are Y(NO₃)₃ (also using Yb(NO₃)₃ and Er(NO₃)₃ in the case of doping), NaF, citric acid, NaOH and ethyl acetate, and deionized water is used as the solvent. The asprepared samples were characterized by X-ray powder diffraction (XRD) and scanning electron microscope (SEM). The effects of experimental parameters on the morphology and the crystal phase of the product were investigated. And the upconversion photoluminescence properties of the NaYF₄∶Yb³⁺,Er³⁺ microtubes were investigated. NaYF4 microtubes with single hexagonal phase are obtained by microwave heating method at a lower temperature in a short period. The formation mechanism of NaYF₄∶Yb³⁺,Er³⁺ microtubes is proposed. The prepared NaYF₄∶Yb³⁺,Er³⁺ microtubes have high luminescence intensity.

Key words: microwave, microtube, NaYF₄, up-conversion photoluminescence

CLC Number:

O648

ZHANG Ling,ZHU Ying-Jie. Microwave Hydrothermal Synthesis of Hexagonal NaYF₄ and Yb³⁺,Er³⁺-doped NaYF₄ Microtubes[J]. Journal of Inorganic Materials, DOI: 10.3724/sp.j.1077.2009.00553.

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Microwave Hydrothermal Synthesis of Hexagonal NaYF₄ and Yb³⁺,Er³⁺-doped NaYF₄ Microtubes

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