Ultrafast flash Joule heating significantly reduces MXene manufacturing time
MXenes are two-dimensional materials made of very thin layers of metals, measured on the atomic scale. They conduct electricity well and have surfaces that can easily interact with other materials, making them excellent candidates for advanced electronic devices, computers and aerospace coatings. The only problem is that, until a recent innovation by James Tour's lab at Rice University, building…
Flash Joule heating, a recent innovation by researchers at Rice University, has significantly reduced the manufacturing time of MXenes, a class of two-dimensional materials. Traditionally, MXenes were synthesized through a lengthy process called liquid-phase chemical etching, which involved using hydrofluoric acid over extended periods, resulting in high costs and toxic waste.
The new method, however, employs gas-phase etching, which utilizes flash Joule heating to rapidly heat a MAX phase material and selectively remove the aluminum layers using a combination of chlorine gas and tetrafluoromethane gas. This approach has cut the synthesis time down to less than 30 seconds, making the process much faster and more controllable.
The gas-phase etching method also offers greater control over the etching process, as the gas composition and exposure time can be adjusted to regulate the extent of etching. With this ultrafast flash Joule heating method, MXenes can now be manufactured more quickly, controllably, and with reduced toxic waste, opening up new possibilities for their application in areas such as catalysis, electronic devices, and aerospace coatings.
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