水杨酸盐敏化BaF2∶Tb3+纳米粒子中的Tb3+离子发光

doi:10.11944/j.issn.1000-0518.2018.07.170295

摘要/Abstract

摘要：

采用水热法制备了均匀、单分散的BaF₂∶Tb³⁺纳米粒子,并采用离子交换法制备了水杨酸钠敏化的BaF₂∶Tb³⁺纳米粒子(SS-BaF₂∶Tb³⁺)。系统地研究了样品的结构、形貌和光致发光性质。结果表明,监测Tb³⁺离子在547 nm的⁵D₄→⁷F₅跃迁,SS-BaF₂∶Tb³⁺纳米粒子获得了从200 nm到385 nm波长范围宽的激发带;激发SS的π-π^*电子跃迁吸收,由于SS到Tb³⁺的能量传递(“天线效应”),SS-BaF₂∶Tb³⁺纳米粒子产生了增强的Tb³⁺离子绿光发射;敏化纳米粒子中Tb³⁺离子光致发光寿命比未敏化纳米粒子中Tb³⁺离子寿命长。

关键词: 敏化, 纳米粒子, 能量传递, 光致发光性质

Abstract:

Uniform BaF₂∶Tb³⁺ nanoparticles have been prepared by hydrothermal synthesis, and sodium salicylate(SS) sensitized BaF₂∶Tb³⁺(SS-BaF₂∶Tb³⁺) nanoparticles have been prepared by the ion exchange technique. Their structures, morphologies and photoluminescence properties were studied. A broad excitation band from 200 to 385 nm by monitoring ⁵D₄→⁷F₅ transition of Tb³⁺ at 547 nm in SS-BaF₂∶Tb³⁺ nanoparticles was detected. Under excitation of the π-π^* electron transition absorption of salicylate, enhanced green emission of Tb³⁺ ions in SS-BaF₂∶Tb³⁺ nanoparticles was observed due to the energy transfer from SS to Tb³⁺ ions by “antenna effect”. The photoluminescence lifetimes of Tb³⁺ ions in SS sensitized nanoparticles were found to be longer than those in un-sensitized nanoparticles.

Key words: sensitization, energy transfer, nanoparticles, photoluminescence properties

李素文, 张学伟, 姜义, 岳巾英, 贯丛. 水杨酸盐敏化BaF₂∶Tb³⁺纳米粒子中的Tb³⁺离子发光[J]. 应用化学, 2018, 35(7): 812-817.

Suwen LI, Xuewei ZHANG, Yi JIANG, Jinying YUE, Cong GUAN. Sensitized Luminescence of Terbium(Ⅲ) in BaF₂∶Tb³⁺Nanoparticles by Salicylate[J]. Chinese Journal of Applied Chemistry, 2018, 35(7): 812-817.

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水杨酸盐敏化BaF₂∶Tb³⁺纳米粒子中的Tb³⁺离子发光

Sensitized Luminescence of Terbium(Ⅲ) in BaF₂∶Tb³⁺Nanoparticles by Salicylate

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