In this review, we examine ‘greener’ routes to nanoparticles of iron oxides, in the recent years; nanotechnology has emerged as a state-of-the-art and cutting edge technology with multifarious applications in a wide array of fields. Natural products or extracted from natural products, such as different plant extracts, have been used as reductants and as capping agents during synthesis. A very easy, efficient, and environment-friendly protocol was developed to synthesize green nanoparticles (NPs) with an aqueous extract of various plant, phenolic compounds extracted from plants play a major role as non-toxic reducing and capping agents for nanoparticles. Nanoparticles and their compounds are known to exert a strong inhibitory and microbial activity on bacteria, viruses, and fungi. In today's world, because of the epidemic of infectious diseases caused by different pathogenic bacteria and the development of antibiotic resistance, green synthesis, characterization, and application of nanoparticles (NPs) are becoming an important challenge in nanotechnology. Green synthesis of nanoparticles is made in large quantities worldwide for a wide range of applications. This technique is very safe and environmentally friendly.

在这篇综述中，我们研究了近年来获得氧化铁纳米颗粒的“更绿色”途径；纳米技术已成为最先进的尖端技术，在广泛的领域具有多种应用。天然产物或从天然产物中提取的产物，例如不同的植物提取物，已在合成过程中用作还原剂和封端剂。开发了一种非常简单、高效且环境友好的方案，用各种植物的水提取物合成绿色纳米颗粒 (NPs)，从植物中提取的酚类化合物作为纳米颗粒的无毒还原剂和封端剂发挥着重要作用。已知纳米颗粒及其化合物对细菌、病毒和真菌具有很强的抑制和微生物活性。在现今世界里，由于不同病原菌引起的传染病的流行和抗生素耐药性的发展，纳米颗粒（NPs）的绿色合成、表征和应用正成为纳米技术的重要挑战。纳米粒子的绿色合成在世界范围内大量进行，用于广泛的应用。这种技术非常安全和环保。