Visible-light-active S-scheme heterojunctions based on porous ZnO nanosheets functionalized with porphyrins and metalloporphyrin [5- (4′-carboxyphenyl)-10,15,20-triphenylporphyrin (H2TPP) and its copper(II) complex (CuTPP), respectively] were developed for efficient Rhodamine B degradation. Porous ZnO, synthesized via hydrothermal-calcination, offered high surface area, mesoporosity, and oxygen vacancies for stable porphyrin immobilization. Functionalization allowed visible absorption and suppressed photoluminescence, indicating improved charge separation. CuTPP/ZnO achieved 95.82% RhB removal within 120 min under simulated sunlight with excellent recyclability. Radical trapping confirmed•OH and O2•- as the primary reactive species. This work demonstrates that combining porosity control, oxygen vacancy modulation, and metalloporphyrin sensitization enables the development of robust photocatalysts for environmental remediation and solar-driven water treatment.
La, D.d., Tonezzer, M., Magna, G., Paolesse, R., Di Natale, C., Lai, V.d., et al. (2026). Metalloporphyrin-functionalized porous ZnO S-scheme heterojunctions with oxygen vacancies for enhanced photocatalysis under simulated sunlight. SURFACES AND INTERFACES, 97 [10.1016/j.surfin.2026.110183].
Metalloporphyrin-functionalized porous ZnO S-scheme heterojunctions with oxygen vacancies for enhanced photocatalysis under simulated sunlight
Gabriele Magna;Roberto Paolesse;Corrado Di Natale;Duy Van Lai;
2026-01-01
Abstract
Visible-light-active S-scheme heterojunctions based on porous ZnO nanosheets functionalized with porphyrins and metalloporphyrin [5- (4′-carboxyphenyl)-10,15,20-triphenylporphyrin (H2TPP) and its copper(II) complex (CuTPP), respectively] were developed for efficient Rhodamine B degradation. Porous ZnO, synthesized via hydrothermal-calcination, offered high surface area, mesoporosity, and oxygen vacancies for stable porphyrin immobilization. Functionalization allowed visible absorption and suppressed photoluminescence, indicating improved charge separation. CuTPP/ZnO achieved 95.82% RhB removal within 120 min under simulated sunlight with excellent recyclability. Radical trapping confirmed•OH and O2•- as the primary reactive species. This work demonstrates that combining porosity control, oxygen vacancy modulation, and metalloporphyrin sensitization enables the development of robust photocatalysts for environmental remediation and solar-driven water treatment.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
