Green Technology Group, Environmental Sciences Department, Faculty of Science, Alexandria University, Alexandria, 21511, Egypt.
National Egyptian Biotechnology Experts Network, National Egyptian Academy for Scientific Research and Technology, Cairo, Egypt.
Sci Rep. 2022 May 5;12(1):7316. doi: 10.1038/s41598-022-11014-0.
In this work, a simple and green synthesis procedure for phytofabrication Zinc oxide-silver supported biochar nanocomposite (Ag/ZnO@BC) via Persicaria salicifolia biomass is investigated for the first time to uphold numerous green chemistry such as less hazardous chemical syntheses. XRD technique showed the crystal structure of the phytosynthesized Ag/ZnO@BC, whereas UV-visible spectroscopy, FT-IR, SEM, EDX, TEM, and XPS analyses indicated the successful biosynthesis of the nanocomposite. Testing the photocatalytic potential of this novel nanocomposite in the removal of TC under different conditions unraveled its powerful photodegradation efficiency that reached 70.3% under the optimum reaction conditions: TC concentration; 50 ppm, pH; 6, a dose of Ag/ZnO@BC; 0.01 g, temperature; 25 °C, and HO concentration; 100 mM. The reusability of Ag/ZnO@BC was evident as it reached 53% after six cycles of regeneration. Ag/ZnO@BC was also shown to be a potent antimicrobial agent against Klebsiella pneumonia as well as a promising antioxidant material. Therefore, the current work presented a novel nanocomposite that could be efficiently employed in various environmental and medical applications.
在这项工作中，首次通过贯叶连翘生物质研究了一种简单且环保的植物合成氧化锌-银负载生物炭纳米复合材料（Ag/ZnO@BC）的方法，以维持众多绿色化学原则，如减少危险化学品的合成。XRD 技术显示了植物合成的 Ag/ZnO@BC 的晶体结构，而紫外-可见光谱、FT-IR、SEM、EDX、TEM 和 XPS 分析表明成功合成了纳米复合材料。在不同条件下测试这种新型纳米复合材料在去除 TC 方面的光催化潜力，揭示了其强大的光降解效率，在最佳反应条件下达到 70.3%：TC 浓度为 50ppm，pH 值为 6，Ag/ZnO@BC 的剂量为 0.01g，温度为 25°C，HO 浓度为 100mM。Ag/ZnO@BC 的重复使用性能明显，经过六次再生循环后达到 53%。Ag/ZnO@BC 还表现出对肺炎克雷伯氏菌的有效抗菌活性以及作为有前途的抗氧化材料。因此，目前的工作提出了一种新型的纳米复合材料，可有效地应用于各种环境和医疗应用。
