Department of Materials Science and Engineering, Michigan Technological University, Houghton, MI, 49931, United States.
Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI, 48109, United States.
Chemosphere. 2022 Dec;309(Pt 1):136691. doi: 10.1016/j.chemosphere.2022.136691. Epub 2022 Oct 6.
Zinc oxide (ZnO), which is widely applied for ultraviolet-light driven photocatalysis, has no activity in visible-light photocatalytic process due to its large band gap of ∼3.2 eV. Herein, however, we demonstrated the multiple self-promotion effects of tetracycline as band adjuster, photo-sensitizer, and charge transfer promoter for ZnO nanorods, realizing its visible-light photocatalytic degradation with an excellent removal efficiency up to 91.1% within only 2 h. Besides, the influence of complex realistic factors on this unique process was evaluated together with tests with realistic water matrices. Furthermore, the active species and degradation products were identified. Both acute and developmental toxicities were found to be reduced as the degradation proceeds. These results pave the path for the brand-new self-driven visible-light photocatalysis.
氧化锌（ZnO）由于其约 3.2eV 的大带隙，在可见光光催化过程中没有活性，但广泛应用于紫外光驱动的光催化。然而，本文证明了四环素作为带调节剂、光敏剂和电荷转移促进剂对 ZnO 纳米棒的多种自促进效应，在仅 2 小时内实现了其可见光光催化降解，去除效率高达 91.1%。此外，还评估了复杂实际因素对这一独特过程的影响，并进行了实际水基质的测试。此外，还确定了活性物质和降解产物。随着降解的进行，发现急性毒性和发育毒性都降低了。这些结果为全新的自驱动可见光光催化铺平了道路。
