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首页> 外文期刊>Bulletin of the Chemical Society of Japan >Photoluminescence of Eu3+ and Tb3+ Ions Adsorbed on Oxide Nanosheets
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Photoluminescence of Eu3+ and Tb3+ Ions Adsorbed on Oxide Nanosheets

机译：Eu3 +和Tb3 +离子的光致发光吸附在氧化物纳米片上

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摘要

Photoluminescence properties of TiO (TiL825O4) and NbO (Nb6O17) nanosheets adsorbed with Ln(3+) ions were studied comparing with those of photoluminescent Gd-Eu-Ti-O and La-Tb-Ta-O perovskite nanosheets. Intense emissions of Ln(3+) (Eu3+ and Tb3+) ions adsorbed on TiO and NbO (Ln(3+)/MO) nanosheets were observed during UV light illumination. The photoluminescence results from the energy transfer from the band gap excitation of the nanosheets to the adsorbed Ln(3+). Coadsorbed H2O increased the emission intensities of the adsorbed Ln(3+) for the Ln(3+)/MO samples. On the other hand, no effect of adsorbed H2O on the emission intensities of the photoluminescent perovskite nanosheets was observed because of the presence of Ln(3+) on the inside of the nanosheets. Hydrogen-bonding networks between O2- ions of the nanosheet surface and the adsorbed H2O surrounding Ln(3+) will promote the energy transfer for the Ln(3+)/MO samples. Recombination and photoreaction of the produced electron and hole of the nanosheet, and a phonon due to the adsorbed H2O suppress the emission, according to the analyses of effects of pH, adsorbed ions and D2O on the emission.
机译：研究了吸附于LN（3+）离子的TiO（TIL825O4）和NBO（NB6O17）纳米片的光致发光性质与光致发光Gd-Eu-Ti-O和La-TB-Ta-O钙钛烯片相比进行了比较。在UV光照射期间观察到吸附在TiO和NBO和NBO和NBO（LN（3 +）/ MO）纳米胸部的LN（3+）（EU3 +和TB3 +）离子的强烈排放。光致发光从纳米片的带隙激发到吸附的LN（3+）的能量转移产生。辅作H2O增加了LN（3 +）/ MO样品的吸附LN（3+）的发射强度。另一方面，由于纳米片内的内部存在LN（3+），因此观察到吸附H2O对光致发光钙钛矿纳米片的发光强度的影响。纳米片表面的O 2之间的氢键网络和周围的LN（3+）的吸附H2O将促进LN（3 +）/ Mo样品的能量转移。根据吸附的H 2 O引起的纳米片的产生电子和孔的重组和光反应，并根据吸附的H 2 O，根据pH，吸附离子和D2O对发射的影响分析，抑制了发射。

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