Russian Journal of General Chemistry. Vol. 92, No. 10, Pages 2042-2046, 2022

E. A. Karpushkin^a^,*, E. A. Mesnyankina^a, M. R. Tagirova^a, O. V. Zaborova^a, and V. G. Sergeyev^a

^aDepartment of Chemistry, Lomonosov Moscow State University, Moscow, 119234 Russia

Abstract— Carbonaceous nanoparticles prepared via solvothermal treatment of citric acid with urea or thiourea have revealed selective response to mercury(II) ions enabling their quantitative determination by means of fluorescence spectroscopy. Dialysis of carbonaceous particles has improved their sensing capacity (reducing the detection limit and extending the detection range). Size distribution of the carbonaceous particles has been directly measured by means of nanoparticles tracking analysis for the first time.

Keywords: carbon nanodots, carbon particles, hydrothermal synthesis, dialysis, urea, thiourea, citric acid, fluorescence, sensing

How to Enhance Sensitivity of Carbonaceous Ultrafine Particles to Metal Ions