One-step synthesis of hollow PEI-NaBiF4:Yb3+/Er3+ upconversion nanoparticles for water-responsive luminescent probe
来源期刊：Journal of Rare Earths2020年第4期
论文作者：Zaifa Pan Yingting Wen Tao Wang Kai Wang Yuanjie Teng Kang Shao
文章页码：362 - 368
摘 要：Novel PEI-modified NaBiF4:Yb3+/Er3+upconversion nanoparticles（UCNPs） with hollow structure were prepared by a surface modification free one-step solvothermal method and applied as a luminescent probe to determinate water content in organic solvents.XRD,SEM and HRTEM results demonstrate that the obtained PEI-NaBiF4:Yb3+/Er3+ UCNPs are pure hexagonal phase with uniform size.The successful modification of PEI on the UCNPs surface was evidenced by ζ-potential test,XPS and TG analysis.These synthesized UCNPs are disintegrated into smaller nanoparticles in the presence of water and thus result in a surface quenching effect,which show the features of 0-100% wide range water response in various organic solvents.The sensing performance towards real samples was validated by the water content determination in beer,rum and white spirit.Furthermore,the luminescence intensity variation of the PEI-modified NaBiF4:Yb3+/Er3+ enable the test visualization and ease of portability.
Zaifa Pan，Yingting Wen，Tao Wang，Kai Wang，Yuanjie Teng，Kang Shao
College of Chemical Engineering,Zhejiang University of Technology
摘 要：Novel PEI-modified NaBiF4:Yb3+/Er3+upconversion nanoparticles（UCNPs） with hollow structure were prepared by a surface modification free one-step solvothermal method and applied as a luminescent probe to determinate water content in organic solvents.XRD,SEM and HRTEM results demonstrate that the obtained PEI-NaBiF4:Yb3+/Er3+ UCNPs are pure hexagonal phase with uniform size.The successful modification of PEI on the UCNPs surface was evidenced by ζ-potential test,XPS and TG analysis.These synthesized UCNPs are disintegrated into smaller nanoparticles in the presence of water and thus result in a surface quenching effect,which show the features of 0-100% wide range water response in various organic solvents.The sensing performance towards real samples was validated by the water content determination in beer,rum and white spirit.Furthermore,the luminescence intensity variation of the PEI-modified NaBiF4:Yb3+/Er3+ enable the test visualization and ease of portability.
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