Developing a novel core-multishelled metal oxide hollow tube with rich oxygen vacancy is highly attractive in photocatalytic degradation of antibiotic pollutant. Herein, ZnO@In₂O₃ core-shell hollow microtubes were synthesized via one-step calcination of ZIF-8@MIL-68(In) formed by an in-situ self-assembly. TEM images demonstrate that 0D ZnO quantum dots (QDs) shell with 0.2 µm were well coated on the surface of 1D In₂O₃ hollow tube as the core with 1.2 µm. The synthesized heterostructure indicates the enhanced photocatalytic performance in tetracycline (TC) degradation compared with single ZIF-derived ZnO and MIL-68(In)-derived In₂O₃ under simulated solar irradiation. Besides, organic pollutants including malachite green (MG), methylene blue (MB) and rhodamine B (RhB) are further used to evaluate the photocatalytic activity of ZnO@In₂O₃, and the effect of weight ratios between ZnO and In₂O₃ on degradation efficiency is also studies. The ZnO@In₂O₃ heterojunction can provide higher specific surface area, expose more active sites, possess appropriate number of oxygen vacancies, enhance light absorption and further effectively boost the transfer and separation of photoinduced charge carriers. In addition, the proposed photocatalytic mechanism and degradation pathway are discussed in detail based on active species trapping test, electron spin resonance (ESR) and LCMS.

开发一种具有丰富氧空位的新型核-多壳金属氧化物中空管在光催化降解抗生素污染物方面极具吸引力。在此，ZnO@In ₂ O _{3核-壳中空微管是}通过一步煅烧原位自组装形成的ZIF-8@MIL-68(In)合成的。TEM图像表明，0D ZnO量子点(QDs)壳层以0.2 µm的厚度很好地包覆在以1.2 µm的1D In ₂ O ₃中空管为核的表面。合成的异质结构表明与单一 ZIF 衍生的 ZnO 和 MIL-68(In) 衍生的 In ₂ O _{3相比，四环素 (TC) 降解的光催化性能增强}在模拟太阳照射下。此外，进一步使用孔雀石绿（MG）、亚甲蓝（MB）和罗丹明B（RhB）等有机污染物来评估ZnO@In 2 O 3 的光催化活性，以及​​ZnO和In 2 O_之间的_重量比的影响₃关于降解效率也在研究中。ZnO@In ₂ O ₃异质结可以提供更高的比表面积，暴露更多的活性位点，拥有适当数量的氧空位，增强光吸收，进一步有效促进光生载流子的转移和分离。此外，基于活性物质捕获测试、电子自旋共振 (ESR) 和 LCMS 详细讨论了所提出的光催化机制和降解途径。