Uniformly microsized luminescent materials obtained through a solid state reaction of WO3 with Ln3+-exchanged zeolite L at 700 °C

In this work, we report the uniformly microsized luminescent materials prepared by a solid state reaction of WO3 and Ln3+-exchanged zeolite L at 700 °C. The obtained materials were investigated by SEM, XRD and photoluminescence spectroscopy. The influence of tungstate-oxygen species on the morphology and luminescence of the materials were discussed in detail. Energy transfer from the tungstate-oxygen species to Eu3+ and Tb3+ ions have been demonstrated by the photoluminescence spectra, implying the loading of tungstate-oxygen species into the nanochannels of the crystals and the close proximity of which to Eu3+ ions.