Abstract Novel excellent antibacterial agent and efficient photocatalyst direct dual Z-scheme ZnO–CeO2-Yb2O3 heterostructured nanocomposite and pristine ZnO, CeO2, and Yb2O3 were prepared via a simple co-precipitation technique. The X-ray diffraction spectra confirmed the formation of pristine ZnO, CeO2, and Yb2O3, and the existence of their peaks ZnO (hexagonal), CeO2 (cubic), and Yb2O3 (cubic) in the nanocomposite. The Scherrer, Williamson-Hall, and Size-Strain plot models were used to measure the microstructural parameters. The UV–vis spectroscopy revealed the energy bandgap 3.0 eV, evident that the grown nanocomposite is a good photocatalyst under sunlight. The formation of the ZnO–CeO2-Yb2O3 nanocomposite is further confirmed by Raman and Fourier transform infrared spectroscopy (FTIR). Current-Voltage (IV) measurements shown the ohmic nature of nanocomposite with high electrical behavior. Scanning electron microscopy (SEM) images revealed a cluster type morphology. The antibacterial activity was carried out for Escherichia coli and Staphylococcus aureus bacteria. The zone of inhibition (ZOI) showed higher antibacterial activity for E. coli bacteria. The nanocomposite showed the highest photocatalytic degradation efficiency against methylene blue as compared to rhodamine-B, methyl orange, cresol red, and safranin-O dyes under 40 min of sunlight illumination. The impact of various parameters on the photocatalytic activity of nanocomposite, including catalyst amount, dye concentration, and solution pH, was also investigated. The scavenger's experiments were performed to ascertain the reactive species and confirmed the mechanism based on Z-scheme. The recyclability test exhibits that the as-obtained nanocomposite has high stability and can be reusable for the 6th cycles.

中文翻译：

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新型光触媒和抗菌剂；直接双 Z 型 ZnO-CeO2-Yb2O3 异质结构纳米复合材料

摘要 通过简单的共沉淀技术制备了新型优异的抗菌剂和高效的光催化剂直接双 Z 型 ZnO-CeO2-Yb2O3 异质结构纳米复合材料和原始的 ZnO、CeO2 和 Yb2O3。X 射线衍射光谱证实了纳米复合材料中原始 ZnO、CeO2 和 Yb2O3 的形成，以及它们的峰 ZnO（六边形）、CeO2（立方）和 Yb2O3（立方）的存在。Scherrer、Williamson-Hall 和 Size-Strain 图模型用于测量微观结构参数。紫外可见光谱显示能带隙为 3.0 eV，这表明生长的纳米复合材料在阳光下是一种很好的光催化剂。拉曼和傅里叶变换红外光谱 (FTIR) 进一步证实了 ZnO-CeO2-Yb2O3 纳米复合材料的形成。电流-电压 (IV) 测量显示具有高电学行为的纳米复合材料的欧姆性质。扫描电子显微镜 (SEM) 图像显示出簇状形态。对大肠杆菌和金黄色葡萄球菌进行了抗菌活性。抑菌圈 (ZOI) 对大肠杆菌表现出更高的抗菌活性。与罗丹明-B、甲基橙、甲酚红和番红-O 染料相比，在 40 分钟的阳光照射下，纳米复合材料对亚甲蓝的光催化降解效率最高。还研究了各种参数对纳米复合材料光催化活性的影响，包括催化剂用量、染料浓度和溶液 pH 值。清道夫' 进行了s实验以确定反应性物种并确认基于Z-scheme的机制。可回收性测试表明，所获得的纳米复合材料具有较高的稳定性，可重复使用第 6 次。