The effects of different pH values on LaVO 4:Eu3+nano-powders prepared by hydrothermal method
LV Hong-yan
LIU Lian-li
WANG Li-li
CUI Yan
SUN Zhi-jia
YUAN De-cheng
Abstract：In this paper, LaVO4:Eu3+nano-powders are successfully obtained by hydrothermal method as the raw materials of LaCl 3 · nH2 O and NH4 VO3 , etc.The as-obtained products are characterized by X -ray powder diffraction ( XRD) , scanning electron microscopy ( SEM) and fluorescence spectrometer ( PL) .We have studied the effects of different pH values of hydrothermal system on the phase , morphology and fluorescence properties of the product .The growth mechanism of LaVO 4 nanocrystals are discussed .The results show that:The micrography of the prepared LaVO 4 are nano-particles and nanorods .When the pH values of hydrothermal system are below 10 , the phase of the product is m -LaVO4 nanocrystals and the fluorescence properties of the product have lower intensity .On the contratry, when the pH values of hydrothermal system is between 11 to 13, the phase of the product is the mixture of m -LaVO4 and t-LaVO4 nanocrystals which have inhibited hihger flu-orescence properties .
Keywords：lanthanum vanadatehydrothermalfluorescencepH values
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 71-76 )