关键字：High resolution transmission electron microscopy;Crystals - Electron diffraction - Electrons - Emission spectroscopy - Luminescence - Morphology - Nanorods - Photoluminescence spectroscopy - Scanning electron microscopy - Transmission electron microscopy - X ray diffraction - X ray photoelectron spectroscopy;Emission intensity - Emission spectrums - HNO3 - Hydrothermally - Luminescence properties - Monoclinic phase - Selected area electron diffraction - TEM micrographs

摘要：LaPO<inf>4</inf>:Eu³⁺powders with different morphologies were hydrothermally constructed by adjusting the amount of HNO<inf>3</inf>without using a catalyst, surfactant, or template. The as-prepared products were characterized by photoluminescence spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), high resolution-transmission electron microscopy (HR-TEM), selected area electron diffraction (SAED), X-ray diffraction (XRD), infrared (IR) spectra, and X-ray photoelectron spectroscopy. The SEM study revealed that the amount of HNO<inf>3</inf>played a crucial role in the morphology of the final products. The XRD results indicated that the as-prepared samples were in the monoclinic phase when 3 mL of HNO<inf>3</inf>was used. The HR-TEM micrographs and SAED results demonstrated that the prepared nanorods were single and crystalline in nature with HNO<inf>3</inf>, and that they grew preferentially along the [0 1 2] direction. The emission spectra showed that the LaPO<inf>4</inf>:Eu³⁺samples had the strongest emission intensity when prepared with HNO<inf>3</inf>.<br/> © 2015 Elsevier B.V. All rights reserved.

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