TY - JOUR
T1 - Enhanced photocatalytic performance for TiO2/g-C3N4 catalysts by coupling with Gd-doped CaAl2O4:Eu2+, Nd3+ phosphor
AU - Kang, Hyun Sung
AU - Xu, Qiushi
AU - Kim, Jung Sik
N1 - Publisher Copyright:
© The Korean Ceramic Society 2025.
PY - 2025/3
Y1 - 2025/3
N2 - 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 under visible-light illumination.
AB - 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 under visible-light illumination.
KW - CaAlO:(Eu, Nd)
KW - Heterojunction
KW - Long lasting phosphor
KW - Photocatalyst
KW - TiO/g-CN
UR - https://www.scopus.com/pages/publications/85217719008
U2 - 10.1007/s43207-025-00478-1
DO - 10.1007/s43207-025-00478-1
M3 - Article
AN - SCOPUS:85217719008
SN - 1229-7801
VL - 62
SP - 370
EP - 377
JO - Journal of the Korean Ceramic Society
JF - Journal of the Korean Ceramic Society
IS - 2
M1 - 164159
ER -