| Enhanced photocatalytic performance for TiO2/g-C3N4 catalysts by coupling with Gd-doped CaAl2O4:Eu2+, Nd3+ phosphor |
Hyun-Sung Kang, Qiushi Xu, Jung-Sik Kim
|
| Department of Materials Science and Engineering, University of Seoul, Seoul, 02504, Republic of Korea |
|
|
|
Received: August 19, 2024; Revised: November 1, 2024 Accepted: January 19, 2025. Published online: February 4, 2025. |
|
|
|
| ABSTRACT |
|
Triply doped CaAl2O4:Eu2+, Nd3+, and Gd3+ phosphors were synthesized using a solid-state method at 1300 °C and coupled with TiO2/g-C3N4. The effects of the Gd3+ concentration as a codopant on the emission intensity and afterglow performance of the phosphors were investigated. The characterization of CaAl2O4:Eu2+, Nd3+, and Gd3+ was performed via X-ray diffraction, scanning electron microscopy, UV–Vis absorption spectroscopy, and energy-dispersive spectroscopy. Fluorescence spectroscopy was performed to evaluate the excitation, emission, and afterglow-decay properties of the synthesized phosphor. The Gd3+-co-doped CaAl2O4:Eu2+, Nd3+ phosphor exhibited enhanced luminescence properties in relation to a commercial CaAl2O4:Eu2+, Nd3+ phosphor. In addition, outstanding photocatalytic efficiencies were observed for the Gd3+-co-doped CaAl2O4:Eu2+, Nd3+ phosphor/TiO2/g-C3N4 composite in relation to those for the non-Gd3+ samples under UV-light illumination. Alternatively, Gd3+-doped and undoped CaAl2O4:Eu2+, Nd3+/TiO2/g-C3N4 exhibited similar photocatalytic efficiencies 1 Department of Materials Science and Engineering, under visible-light illumination. |
| Key words:
CaAl2O4:(Eu, Nd) · Long lasting phosphor · TiO2/g-C3N4 · Photocatalyst · Heterojunction |
|
PDF Links 
Full text via DOI
Download Citation 
