(1. 湖南大學(xué) 化學(xué)化工學(xué)院，長(zhǎng)沙 410082；
2. 湖南有色冶金勞動(dòng)保護(hù)研究院，長(zhǎng)沙 410014)
摘 要: 采用水熱法合成多種形貌和尺寸的NaYF4 :Yb3+,Er3+上轉(zhuǎn)換發(fā)光材料，探討螯合劑、敏化劑、激活劑、氟化銨用量及水熱時(shí)間對(duì)目標(biāo)產(chǎn)物發(fā)光性能的影響規(guī)律，并通過(guò)正交實(shí)驗(yàn)優(yōu)化Yb3+、Er3+共摻雜NaYF4 上轉(zhuǎn)換發(fā)光納米材料的合成條件。采用XRD、SEM和熒光光譜對(duì)目標(biāo)產(chǎn)物進(jìn)行對(duì)比分析。結(jié)果表明：目標(biāo)產(chǎn)物為β-NaYF4，在980 nm紅外光的激發(fā)下，發(fā)出明亮的綠光，最強(qiáng)發(fā)射峰在542 nm。可通過(guò)改變螯合劑的種類來(lái)控制生成不同尺寸(納米級(jí)或微米級(jí))和形貌(管狀、球形或六棱柱形)的目標(biāo)產(chǎn)物。所制備的NaYF4:Yb3+/Er3+上轉(zhuǎn)換發(fā)光材料分散性好、熒光強(qiáng)度高，在生物探針及生物成像等領(lǐng)域具有潛在的應(yīng)用價(jià)值。
關(guān)鍵字: 水熱法；上轉(zhuǎn)換；NaYF4:Yb3+, Er3+；發(fā)光性能；正交實(shí)驗(yàn)
（1. Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China;
2. Institute of Nonferrous Metallurgy Labor Protection, Hunan, Changsha 410014, China）
Abstract:NaYF4: Yb3+, Er3+ up-conversion (UC) luminescence materials with different shapes and sizes were obtained by a facile hydrothermal method. The effects of chelating agent, sensitizer concentration, activator concentration, NH4F concentration and the hydrothermal time on the luminescence properties of the products were investigated. And the synthetic conditions were optimized by orthogonal experiments. Then, the products were characterized by XRD and SEM. The results show that the minimum particle size of the sample is about 100 nm. The fluorescence spectra is also demonstrated, the results show that the products emit green fluorescence at 542 nm when they are excited by a 980 nm laser source. β-NaYF4 with different shapes (tubular, nanospheres, hexagonal prisms) and sizes(from nano-scale to micro-scale) can be selectively synthesized in different chelating agents. β-NaYF4: Yb3+, Er3+ have the potential application in biological labeling and imaging for its strong UC emission intensity and better dispersion.
Key words: hydrothermal method; up-conversion; NaYF4: Yb3+, Er3+; luminescence; orthogonal experiment
