Unique and infrequent strategy to greenly synthesize silver imprinted zinc oxide nanoparticles (AgZnO NPs) is presented. A facile and low cost phytosynthetic route using guava leaves aqueous extract succeeded in decorating commercial ZnO with Ag nanoparticles without needing environmentally undesirable chemical reagents. The AgZnO NPs were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR), ultraviolet/visible (UV/Vis) spectrophotometry/spectrofluorimetry, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Band gap calculations of Ag(2.5mol%)/ZnO give estimate of (3.03 eV) compared to 3.25 eV for ZnO. indicating good capacity of visible light absorption. This improves the solar energy harvesting characteristics of the phyto-developed AgZnO NPs. Moreover, the photocatalytic efficacy of AgZnO NPs is tested in detoxification of methylene blue (MB) enriched aqueous solutions. Parameters affecting the photodegradation rate like catalyst dosage, amount of Ag loading and pH were investigated and optimized. Under ≈18 min of sunlight-irradiation (800 W/m²), over 22 mg/L of alkaline solution of MB can be efficiently photomineralized using 0.4 g of Ag(2.5%)/ZnO NPs. Under the optimized conditions, the developed photocatalysts show a great stability after 6 folds of photocatalytic cycles reflecting their efficient photocatalytic performance in the long run.

介绍了绿色合成银印的氧化锌纳米颗粒（AgZnO NPs）的独特且不常见的策略。使用番石榴叶水提物的一种简便且低成本的植物合成路线成功地用Ag纳米粒子修饰了商业ZnO，而无需使用对环境不利的化学试剂。AgZnO NPs的特征在于X射线衍射（XRD），傅立叶变换红外（FTIR），紫外/可见（UV / Vis）分光光度法/荧光光谱法，扫描电子显微镜（SEM）和透射电子显微镜（TEM）。Ag（2.5mol％）/ ZnO的带隙计算得出的估计值为（3.03 eV），而ZnO为3.25 eV。表明可见光吸收能力良好。这改善了植物开发的AgZnO NP的太阳能收集特性。而且，在富集亚甲基蓝（MB）的水溶液中进行解毒测试了AgZnO NPs的光催化功效。研究和优化了影响光降解速率的参数，如催化剂用量，银负载量和pH。在≈18分钟的日光照射下（800 W / m²），使用0.4 g的Ag（2.5％）/ ZnO NP可以有效地光解超过22 mg / L的MB碱性溶液。在优化的条件下，经过6倍的光催化循环后，开发的光催化剂显示出很高的稳定性，反映了其长期有效的光催化性能。