| Abstrakt: |
MIL-125-(Ti) is an attractive material in photocatalysis due to its notable characteristics, including its expansive specific surface area, porous structure, high thermal stability, and chemical resistance. Unfortunately, the high electron-hole recombination rate and weak utilization of visible light restrict its practical application. Here, a CuS nanoparticle/MIL-125-(Ti) heterojunction with a compact interface contact was prepared by a facile hydrothermal method for photocatalytic tetracycline degradation. The aligned internal electric field and interface structure of the CuS nanoparticles/MIL-125-(Ti) heterojunction show promise in effectively addressing the aforementioned challenges. Detailed characterization showed that CuS nanoparticles/MIL-125-(Ti) generated a redshift in light absorption, and the photogenerated electron-hole recombination rate was reduced by about 67.5% compared with MIL-125-(Ti), greatly improving the photocatalytic performance. Photogenerated electrons between the conductive band of CuS nanoparticles and MIL-125-(Ti) with Ti4+ to Ti3+ reduction contributed to the enhanced photocatalytic performance, and the generated active species (h+, ·OH, ·O2-) degraded tetracycline rapidly. The kinetic parameters of tetracycline degradation by the CuS/MIL-125-(Ti) composite with an optimal doping amount are 12.7 and 7.9 times higher than those of a single component. [ABSTRACT FROM AUTHOR] |
