Amino-functionalized NH₂-MIL-125(Ti)-decorated hierarchical flowerlike Znln₂S₄ for boosted visible-light photocatalytic degradation

Abstract

Developing novel heterojunction photocatalysts with visible-light response and remarkable photocatalytic activity have been verified to applying for the photodegradation of antibiotics in water environment. Herein, NH₂- MIL-125(Ti) was integrated with flowerlike Znln₂S₄ to construct NH₂-MIL-125(Ti)@Znln₂S₄ heterostructure using a one-pot solvothermal method. The photocatalytic performance was evaluated by the degradation of tetracycline (TC) under visible light illumination. The optimized NM(2%)@ZIS possesses a photodegradation rate (92.8%) and TOC removal efficiency (58.5%) superior to pristine components, which can be principally attributed to the positive cooperative effects of well-matched energy level positions, strong visible-lightharvesting capacity, and abundant coupling interfaces between the two. Moreover, the probable TC degradation mechanism was also clarified using the active species trapping experiments. This study inspires further design and construction of NH₂-MIL-125(Ti) and Znln₂S₄ based photocatalysts for effective removal of antibiotics in water environment.