A novel Z-scheme AgI/BiOBr hybrid photocatalyst was successfully synthesized by a solvothermal-precipitation method, and its photocatalytic activity was evaluated by the degradation of ciprofloxacin (CIP, a typical antibiotic). The crystallization, morphology, photo-response, surface structure and electrochemical properties of the as-obtained photocatalyst were characterized by XRD, XPS, SEM, TEM, BET, UV–Vis absorption spectroscopy and photoluminescence spectra (PL) measurements, respectively. The optimized AgI(20 wt%)/BiOBr composite exhibited a remarkable photocatalytic activity and a rapid degradation ability for CIP with a removal efficiency of 90.9% in 1 h, which was considerably better than those of pure BiOBr (58.6%) and pure AgI (4.6%) alone as well as their simple mixtures (31.4%) under the same conditions, suggesting an synergistic effect in the hybrid materials. Meanwhile, CIP was efficiently mineralized, as revealed by a total organic carbon (TOC) removal efficiency of ca. 90% within 2 h, which was further confirmed by the 3D EEMs measurement. The reactive species trapping and electron spin resonance (ESR) experiments demonstrated that O₂⁻, h⁺ and OH all participated in the CIP photodegradation process. The photocatalytic mechanism of AgI/BiOBr composites could be rationally explained by considering the Z-scheme structure, resulting in the higher redox potential and more efficient separation of charge carriers. Moreover, the wider photo-response range induced by the photosensitization of AgI also contributed to the superior photocatalytic activity of the hybrid materials. This work reports a novel method for the facile preparation of Z-scheme AgI/BiOBr hybrid photocatalyst and provides an effective methodology for the mineralization of CIP.

通过溶剂热沉淀法成功合成了一种新型的Z型AgI / BiOBr杂化光催化剂，并通过环丙沙星（一种典型的抗生素）的降解评估了其光催化活性。分别通过XRD，XPS，SEM，TEM，BET，UV-Vis吸收光谱和光致发光光谱（PL）测量来表征所获得的光催化剂的结晶，形态，光响应，表面结构和电化学性能。优化的AgI（20 wt％）/ BiOBr复合材料表现出显着的光催化活性和对CIP的快速降解能力，在1小时内的去除效率为90.9％，这明显优于纯BiOBr（58.6％）和纯AgI （4.6％）以及它们在相同条件下的简单混合物（31.4％），提示在杂化材料中有协同作用。同时，CIP被有效地矿化了，从总有机碳（TOC）去除率大约为200可以看出。2小时内达到90％，这已通过3D EEMs测量进一步证实。反应性物种捕获和电子自旋共振（ESR）实验表明，Ø ₂ ^-，H ⁺和OH全部参加CIP光降解过程。AgI / BiOBr复合材料的光催化机理可以通过考虑Z方案结构来合理解释，从而导致更高的氧化还原电势和更有效的载流子分离。而且，由AgI的光敏作用引起的更宽的光响应范围也有助于杂化材料的优异光催化活性。这项工作报告了一种简便的制备Z型AgI / BiOBr杂化光催化剂的新方法，并为CIP的矿化提供了一种有效的方法。