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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Blue-emitting yttria-stabilized tetragonal zirconia nanoparticles capped by PVA
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Blue-emitting yttria-stabilized tetragonal zirconia nanoparticles capped by PVA

机译：PVA包覆的蓝稳定氧化钇稳定的四方氧化锆纳米粒子

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摘要

Polycrystalline yttria-stabilized tetragonal zirconia nanoparticles having a grain size around 50-80 nm were fabricated in aqueous poly (vinyl alcohol) (PVA) solution by mechanical attrition in a planetary mill, with the PVA used as a capping agent. The surface-modified nanoparticles displayed a significant near-band-edge photoluminescence with emission band centered at 428 nm due to the good surface passivation of the nanoparticles by the PVA molecules. An enhancement of the blue emission was observed when the nanoparticles were embedded in solid PVA matrix. Elevating the temperature of the zirconia nanoparticle solution from 337.5 to 357.5 K lead to temperature quenching of the luminescence due to the decrease of emissive centers caused by desorption of PVA from the nanoparticle surface.
机译：通过在行星式碾磨机中通过机械研磨在聚乙烯醇（PVA）水溶液中制备粒度约为50-80 nm的多晶氧化钇稳定的四方氧化锆纳米粒子，并将其用作封端剂。由于PVA分子对纳米粒子具有良好的表面钝化作用，因此表面改性的纳米粒子显示出明显的近带边缘光致发光，且发射带集中在428 nm处。当将纳米颗粒嵌入固体PVA基质中时，观察到蓝色发射的增强。氧化锆纳米颗粒溶液的温度从337.5 K升高到357.5 K，由于PVA从纳米颗粒表面解吸引起的发射中心的减少，导致了发光的温度猝灭。

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