In this paper we report controlled synthesis of sub 10 nm silver nanoparticles at 30 g/day at room temperature condition using a green protocol using a free impinging jet reactor. The focus is on impingement of low velocity liquid jets to ensure process completion in the film. Identical liquid jets of 400-micron diameter with low Weber number (We = 10–40) were impinged at different approach angles (90°–150°) to explore mixing characteristics using iodide-iodate reaction system. The regime showed monotonic improvement in silver nanoparticle mean size and polydispersity with increase in We. The smallest and most uniform (5.2 ± 0.9 nm) particles could be synthesized at We = 40. The study also establishes the horizontal component of jet velocity as a parameter to control mixing and particle size. Under identical reaction condition a free impinging jet reactor outperformed two other continuous reactors viz. a spinning disc reactor and a spinning disc spinning bowl reactor in terms of mean particle size.

在本文中，我们报告了在室温条件下使用绿色方案，使用自由撞击射流反应器以30 g /天的受控合成低于10 nm的银纳米粒子的过程。重点是对低速液体射流的冲击，以确保薄膜中的工艺完成。相同的直径为400微米，低Weber数（We  = 10–40）的液体射流以不同的进入角（90°–150°）撞击，以探索使用碘化物-碘酸盐反应系统的混合特性。该方案显示随着We的增大，银纳米粒子的平均尺寸和多分散性单调改善。最小和最均匀（5.2±0.9 nm）的颗粒可以在We处合成 =40。研究还确定了射流速度的水平分量作为控制混合和粒径的参数。在相同的反应条件下，自由撞击射流反应器的性能优于其他两个连续反应器。就平均粒度而言，该转盘式反应器和转盘式转鼓式反应器。