Preparation and Luminescence Property of Eu 3+ Doped Porous Lanthanum Zirconate Powder

doi:10.15541/jim20180437

Abstract

Abstract:

Pyrochlore type of lanthanum zirconate powder was prepared by Sol-Gel method using LaCl₃ and ZrClO₂·8H₂O as raw materials, ethanol and deionized water as solvents, and the template P123 was introduced to control the pore structure in the powder. XRD, SEM and BET were used to determine the powder structure and morphology, and the luminescence property of Eu ³⁺ doped lanthanum zirconium samples were measured by fluorescence spectra. The results show that the introduction of template P123 is helpful to increase the number of large pores. When 6.56 g·mL ^-1 of P123 was used in the solution, there are lots of pores in the lanthanum zirconate particles, which have an average size of 43 nm and average capacity of 0.15 cm ³·g ^-1. The luminescence property of Eu ³⁺ doped lanthanum zirconium samples were significantly enhanced, and the quenching concentration increased from 9mol% to 11mol%.

Key words: lanthanum zirconate, porous material, doping, luminescence property

CLC Number:

TQ175

YANG Jin-Ping, JI Wen-Ling, ZHANG Hao, LIU Pan, CUI Yi, WEI Heng-Yong. Preparation and Luminescence Property of Eu ³⁺ Doped Porous Lanthanum Zirconate Powder[J]. Journal of Inorganic Materials, 2019, 34(7): 727-733.

Figures/Tables 8

Fig. 1 XRD patterns of lanthanum zirconate powders with different dosage of P123

Fig. 2 SEM images of lanthanum zirconate powders with different dosage of P123

Fig. 3 N2 adsorption/desorption and pore size distribution curves of the samples with different P123

Fig. 4 Emission spectra of La2Zr2O7 powders doped with different concentration of Eu3+ (λex=240 nm)

Fig. 5 Emission spectra of porous La2Zr2O7: xmol% Eu3+ powders synthesized with different dosage of P123 (x=5mol%, 7mol%, 9mol%, 11mol%, 13mol%)

Fig. 6 XRD patterns of La2Zr2O7: xmol% Eu3+ powders synthesized by adding P123 (x=0, 9)

Fig. 7 XPS spectra of Zr3d, La3d, O1s, and Eu3d peaks from La2Zr2O7: 9mol%Eu3+ NPs powders

Fig. 8 XPS spectra of Zr3d, La3d, O1s and Eu3d peaks from La2Zr2O7: 9mol% Eu3+ NPs powders with 6.56 g·mL-1 of P123

References 18

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Preparation and Luminescence Property of Eu ³⁺ Doped Porous Lanthanum Zirconate Powder

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