Video: Vortex fluidic device drives dye degradationS. Himmelstein | November 07, 2022
A vortex fluidic device (VFD) engineered at Australia’s Flinders University offers an efficient means of coating materials and components to improve wastewater treatment processes. The VFD has been demonstrated to synthesize esters, amides, ureas, imines, alpha-amino phosphates, beta-Keto esters and other chemicals for various applications and was recently demonstrated to prepare composite materials and coat them for dye degradation during wastewater treatment.
The technology provides a fast and sustainable way to use three different VFD applications for material fabrication, reactor coating and material banding. The materials were magnetically held against the surface of the VFD’s rapidly rotating tube, enhancing catalytic activity in degrading four different organic dyes under real-time monitoring, with at least a fivefold increase in the degradation efficiency compared to batch processing.
To enhance the platform performance, the VFD tube reactor was chemically modified, incorporating a thin layer of silica-activated carbon xerogel coating, which behaves synergistically with the composite nanoflowers. This coated tube is highly stable and reusable, and dramatically increases degradation efficiency by about 30-fold compared to using batch processing.
“The VFD enables coating the material as one layer but also as segregated bands for multi-step reactions,” explained the researchers. “This set-up applies to multiple synthetic dyes and we saw dramatic increase in degradation efficiency while using the VFD.”
The device described in ACS Applied Nano Materials can also find application in medical and pharmaceutical research, food processing, materials processing and more.