• • SrAl2O4:Eu2+,Dy3+ exhibits green afterglow at 520 nm lasting up to 30 hours, enabling prolonged catalytic activity after light cessation, which is critical for round-the-clock environmental remediation.
• • Composite g-C3N4@Au@SrAl2O4:Eu2+,Dy3+ achieves efficient plasmonic photocatalytic degradation and hydrogen evolution, with performance sustained in darkness, addressing the intermittency of solar irradiation.
• • Z-scheme Cu|CuO/SrAl2O4:Eu2+,Dy3+ composite film enables simultaneous degradation and hydrogen evolution, with reported efficiencies suitable for practical wastewater treatment and clean fuel generation.
• • Sr2MgSi2O7:Eu2+,Dy3+/Ag3PO4 Z-scheme photocatalyst demonstrates high activity for organic pollutant degradation and hydrogen production, with performance metrics indicating potential for scale-up in industrial photoreactors.