MicroJet Reactor Technology: An Automated, Continuous Approach for Nanoparticle Syntheses

Abstract

A new design of a confined impinging jet microreactor has been applied for continuous‐flow syntheses of metal chalcogenide nanomaterials. The microjet reactor is an automated, flexible, scalable, and thus industrially viable technology allowing a strict control over process parameters for the design of materials with tunable properties. Due to the short mixing times in the µs to ms range, crystallite nucleation and crystal growth are well separated and enable concentration‐limited particle growth and thus nanoparticle synthesis. The first approaches on the microjet reactor setup presented here were focused on the synthesis of nanocrystalline Ta‐doped tin dioxides and cadmium sulfide nanoparticles. The nanomaterials were characterized by a number of methods like powder X‐ray diffraction and conductivity measurements.

Continuous Flow Synthesis of Cd1‐xZnxS and CdS/ZnS Core/Shell Semiconductor Nanoparticles by MicroJet Reactor Technology

“…A detailed description of the MJR synthesis testing unit was provided by Hiemer et al. [17] Figure 14 shows the simplified setup. Briefly, two High Performance Liquid Chromatography (HPLC) pumps transport the precursor solutions, typically aqueous solutions of metal salt(s) including stabilizer (P1) and sulfur source (P2), downstream from their reservoirs.…”

Revisiting aromatic diazotization and aryl diazonium salts in continuous flow: highlighted research during 2001–2021

“…It is worth mentioning that there are many confined jet reactors used to prepare nanoparticles, which is a good reference for reactions involving aryl diazonium salts prepared in situ . 112–114…”

“…It is worth mentioning that there are many confined jet reactors used to prepare nanoparticles, which is a good reference for reactions involving aryl diazonium salts prepared in situ. [112][113][114] In addition, with the advantages of more precise control of the light radiation time and uniform light in a continuous flow, the application of photocatalytic aryl radical generation in flow has gradually attracted interest. In 2017, Basso et al proposed using [Ru(bpy 3 )]Cl 2 as a photocatalyst in a continuous flow system to prepare isochromanones (25) from aryl diazonium tetrafluoroborates via the Meerwein reaction.…”

Mixing Performance in a Distributed-Feed Plate-Type Reactor with Multinozzle Injection for Fine Chemical Production Scale

“…The microjets can be used to generate a cocurrent, counter-current, or even 180° colliding flow arrangements to induce a mixing process. Impinging or colliding jets have been among other authors investigated by Johnson and Prud’homme and most recently by Hiemer et al Lim et al . employed a coaxial microjet mixer for the synthesis of nanoparticles.…”