Nanodiamonds from coal under ambient conditions

Nanoscale
J XiaoG W Yang

Abstract

Coal is the most abundant energy resource, but it is only useful for producing energy via combustion due to its structural characteristics. However, coal is also inexpensive and is the most plentiful and readily available carbon source material for the production of nanodiamonds compared with the most widely used solid carbon source, high-purity graphite, and the high-purity hydrocarbon gas precursor, methane. Here, we report a simple and green top-down strategy for synthesizing nanodiamonds with a cubic phase and a mean size of 3 nm from various types of coal at atmospheric pressure and room temperature using a novel process involving laser ablation in liquid. Furthermore, we have systematically studied the process of phase transformation from coal to nanodiamonds using nucleation thermodynamics, growth kinetics and structural stability. The synthesized nanodiamonds have turned out to be soluble monodisperse colloids that exhibit strong and stable fluorescence both in alcohol and in water. These results provide a route for producing nanodiamonds from inexpensive and abundant coal.

References

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Dec 20, 2011·Nature Nanotechnology·Vadym N MochalinYury Gogotsi

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Citations

Aug 31, 2016·Journal of Colloid and Interface Science·David AmansChristophe Dujardin
Dec 23, 2017·Scientific Reports·Manoj BGeorge Thomas Chirayil
Nov 26, 2015·Science Advances·Bitao PanGuowei Yang
Sep 19, 2020·International Journal of Nanomedicine·Xiumei TianFukang Xie

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