Effect of annealing temperature and doping concentrations on structure and optical properties of Eu3+-doped TiO2 nanomaterials

Authors

  • Nguyen Tri Tuan*
  • Tong Thi Hao Tam
  • Nguyen Tu
  • Do Quang Trung
  • Nguyen Van Du
  • Tran Minh Tien
  • Vu Thi Hang
  • Nguyen Trong Tuan
  • Nguyen Van Quang
  • Manh Trung Tran

Abstract

In this study, we successfully synthesized europium-doped TiO2(TiO2:Eu3+) nanomaterials (NMs) with crystalline sizes ranging from 6.5 to 71.7 nm through a sol-gel method. Analysis of X-ray diffraction (XRD) patterns and ultraviolet-visible (UV-Vis) spectra indicates that the substitution of smaller-sized Ti4+ ions (0.745 Å) by largersized Eu3+ ions (0.947 Å) was more efficient at higher doping concentrations and annealing temperatures. Photoluminescence (PL) and photoluminescence excitation (PLE) spectra of the synthesized TiO2:7%Eu3+ NMs exhibit a strong red emission band peaking at 613 nm and remarkable absorption in the blue light region centered at 463 nm, making them suitable for use in white light-emitting diode (WLED) applications. Our findings reveal that both annealing temperature and doping concentration significantly influence the structure and properties of these materials. Besides, the research team has seen, under the experimental conditions, the TiO2:7%Eu3+ sample annealed at 800°C exhibits the highest PL intensity. These results underscore the potential of the synthesized TiO2:Eu3+ NMs as red-emitting materials for WLED applications.

Keywords:

Eu3 doped TiO2, nanomaterials (NMs), photoluminescence, sol-gel method, TiO2

DOI:

https://doi.org/10.31276/VJSTE.66(1).10-15

Classification number

2.1, 2.3

Author Biographies

Nguyen Tri Tuan

College of Natural Sciences, Can Tho University, Campus II, 3/2 Street, Xuan Khanh Ward, Ninh Kieu District, Can Tho City, Vietnam

Tong Thi Hao Tam

School of Information Technology and Digital Economics, National Economics University, 207 Giai Phong Street, Dong Tam Ward, Hai Ba Trung District, Hanoi, Vietnam

Nguyen Tu

Faculty of Fundamental Sciences, Phenikaa University, Yen Nghia Ward, Ha Dong District, Hanoi, Vietnam

Do Quang Trung

Faculty of Fundamental Sciences, Phenikaa University, Yen Nghia Ward, Ha Dong District, Hanoi, Vietnam

Nguyen Van Du

Faculty of Fundamental Sciences, Phenikaa University, Yen Nghia Ward, Ha Dong District, Hanoi, Vietnam

Tran Minh Tien

Faculty of Fundamental Sciences, Phenikaa University, Yen Nghia Ward, Ha Dong District, Hanoi, Vietnam

Vu Thi Hang

College of Natural Sciences, Can Tho University, Campus II, 3/2 Street, Xuan Khanh Ward, Ninh Kieu District, Can Tho City, Vietnam

Nguyen Trong Tuan

College of Natural Sciences, Can Tho University, Campus II, 3/2 Street, Xuan Khanh Ward, Ninh Kieu District, Can Tho City, Vietnam

Nguyen Van Quang

Department of Chemistry, Hanoi Pedagogical University 2, Nguyen Van Linh Street, Xuan Hoa Ward, Phuc Yen City, Vinh Phuc Province, Vietnam

Manh Trung Tran

Faculty of Materials Science and Engineering, Phenikaa University, Yen Nghia Ward, Ha Dong District, Hanoi, Vietnam

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Published

2024-03-15

Received 9 March 2023; revised 13 April 2023; accepted 1 August 2023

How to Cite

Nguyen Tri Tuan, Tong Thi Hao Tam, Nguyen Tu, Do Quang Trung, Nguyen Van Du, Tran Minh Tien, Vu Thi Hang, Nguyen Trong Tuan, Nguyen Van Quang, & Manh Trung Tran. (2024). Effect of annealing temperature and doping concentrations on structure and optical properties of Eu3+-doped TiO2 nanomaterials. Vietnam Journal of Science, Technology and Engineering, 66(1), 10-15. https://doi.org/10.31276/VJSTE.66(1).10-15

Issue

Section

Physical Sciences