A simple and environment-friendly approach to prepare zinc oxide nanoaggregates was achieved by employing ethylene glycol–H₂O as the reaction medium. The composition and structure of the as-fabricated ZnO products were confirmed using X-ray diffraction, scanning and transmission electron microscopy, X-ray photoelectron spectroscopy, and nitrogen adsorption measurements. By tailoring the volume ratio of ethylene glycol to water, coral-like, flower-like, and nanoparticulate ZnO nanoaggregates were successfully synthesized. The impact of the structure of the as-obtained ZnO nanoaggregates on the photocatalytic degradation of ciprofloxacin was further studied. Under simulated solar light irradiation, the photocatalytic removal rate of coral-like, flower-like, and nanoparticulate ZnO nanoaggregates for ciprofloxacin was 45%, 80%, and 90%, respectively. The reactive species trapping experiment result indicated that the generated holes, OH⁻, and ·O₂⁻ active species mainly contributed to the degradation of ciprofloxacin. On the basis of photoluminescence spectra and photo/electrochemical measurement results, the prevention of electron-hole recombination and the rapid charge transfer upon the ZnO nanoparticle aggregates resulted in their efficient photocatalytic activity.

Engineered zinc oxide nanoaggregates for photocatalytic removal of ciprofloxacin with structure dependence

通过使用乙二醇-H ₂实现了一种简单且环保的制备氧化锌纳米聚集体的方法以O为反应介质。使用X射线衍射，扫描和透射电子显微镜，X射线光电子能谱和氮吸附测量来确定所制造的ZnO产品的组成和结构。通过调整乙二醇与水的体积比，成功合成了珊瑚状，花状和纳米颗粒状的ZnO纳米聚集体。进一步研究了所获得的ZnO纳米聚集体的结构对环丙沙星光催化降解的影响。在模拟太阳光照射下，环丙沙星的珊瑚状，花状和纳米颗粒ZnO纳米聚集体的光催化去除率分别为45％，80％和90％。捕集实验结果的反应性物质表明，生成的空穴，OH ^-，和·O2 ₂ ^-活性种主要促成环丙沙星的降解。根据光致发光光谱和光/电化学测量结果，防止电子-空穴复合以及对ZnO纳米颗粒聚集体的快速电荷转移导致了其有效的光催化活性。

工程氧化锌纳米聚集体用于光催化去除环丙沙星的结构依赖性