The Kuzbass Basin coals as a raw material for the preparation of carbon quantum dots

Abstract

The article discusses a promising method for producing carbon quantum dots (C-dots) from coal. Coal grades A (anthracite), K (coking), OS (lean-sintered) were used as raw materials. The separated particles were investigated by X-ray diffraction and optical methods of analysis. The interplanar distances in C-dots and the phase ratio in the samples are determined. The intrinsic absorption region was determined from the optical spectra and the band gap of the obtained C-dots was estimated. Lines of photoluminescence were found in the UV and visible ranges.

Controlled formation of ball-milled carbon quantum dots via optimized graphite structures by numerical simulation

“…More importantly, our results are also consistent with other related experimental studies on CQD formations, i.e., the intrinsic properties of coal could significantly affect the formed CQD performance. 9,10,14,18,30…”

“…, the intrinsic properties of coal could significantly affect the formed CQD performance. 9,10,14,18,30…”

“…As a result, many researchers applied chemical reagents to exfoliate the graphite structure. 13,17,18 Nevertheless, the commonly employed chemical reagents include strong oxidants and acids, which may lead to the generation of toxic gases and pollution. 19 In addition, such a method might also generate CQDs with inhomogeneous size distributions.…”