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Preparation, characterization and luminescence properties of perovskite La2Ti2O7:Eu3+ nanobelts by electrospinning



  1. Laboratory of Building Energy-Saving Technology Engineering, College of Material Science and Engineering, Jilin Jianzhu University, Changchun 130118, China
  2. Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, China


Quasi-one-dimensional [La(NO3)3+Eu(NO3)3+Ti(SO4)2]/PVP composite nanobelts were fabricated via electrospinning, and La2Ti2O7:Eu3+ nanobelts have been obtained after the relevant composite nanobelts were calcined at 800 ºC in air for 8h. The structural properties were characterized by x-ray diffraction(XRD), field emission scanning electron microscope(FESEM), and transmission electron microscope(TEM). XRD analysis indicates that La2Ti2O7:Eu3+ nanobelts are monoclinic in structure with space group P21. FESEM and TEM analysis indicate the surface of [La(NO3)3+Eu(NO3)3+Ti(SO4)2]/PVP composite nanobelts is smooth, the width is ca. 3-4 μm, and the thickness is ca. 160 nm. La2Ti2O7:Eu3+ nanobelts are composed of nanorods with the length ranging from 270 to 660 nm. The width of La2Ti2O7:Eu3+ nanobelts is ca. 3 μm, and the thickness is ca. 140 nm. The photoluminescent(PL) properties of the La2Ti2O7:Eu3+ nanobelts were also studied. It is observed that the charge-transfer excitation bands of Eu3+ in the nanobelts are red-shifted with the increase of doping Eu3+ ion concentration. Under ultraviolet excitation of 274 nm, the La2Ti2O7:Eu3+ nanobelts emit the main emission peak at 615 nm, corresponding to 5D0→7F2 transition of Eu3+. The PL emission intensity of Eu3+ increases with its doping concentration from 1 mol% to 9 mol% without concentration quenching effect. Possible formation mechanism of La2Ti2O7:Eu3+ nanobelts was proposed..


Electrospinning, La2Ti2O7, Nanobelt, Luminescence properties.

Submitted at: Oct. 25, 2022
Accepted at: April 5, 2023


FEI BI, RENYUAN LIU, GUANGQING GAI, XIANGTING DONG, Preparation, characterization and luminescence properties of perovskite La2Ti2O7:Eu3+ nanobelts by electrospinning, Journal of Optoelectronics and Advanced Materials Vol. 25, Iss. 3-4, pp. 150-157 (2023)