Simple one-step synthesis of water-soluble fluorescent carbon dots derived from paper ash

Anomalous fluorescence of the spherical carbon nitride nanostructures

“…Highly photoluminescent carbon dots with a QY of 9.3% were prepared via a simple one-step synthesis route using waste paper [24]. Fluorescent carbon nanoparticles (CNPs) 2-6 nm in size with a quantum yield of about similar to 3% were synthesized via nitric acid oxidation of carbon soot.…”

Biomolecule-derived quantum dots for sustainable optoelectronics

“…Realizing the need for cheap, renewable, abundant and ecofriendly carbon sources for the synthesis of biomoleculederived QDs (including C-QDs and G-QDs), biomass and their wastes have recently received great attention, and thus far served well to full the requirements for their synthesis. In this regard, various biomass and their wastes, for example, (i) agricultural products, [100][101][102][103][104][105][106][107] (ii) animals and their derivatives, [108][109][110][111][112] (iii) foods (including bakery products and beverages), [113][114][115][116][117][118][119] and (iv) industrial products, 120,121 have been demonstrated to be applicable for the scalable, low-cost synthesis of carbon-based QDs, with superior optical features and applications mostly in biological and sensing purposes. Agricultural products and their wastes, such as rice husk, sugar cane molasses and bagasse, chia seeds, coffee grounds, grass, dead neem leaves, and wood charcoal, have been used as carbon precursors for the fabrication of application-specic C-QDs and G-QDs.…”

Electrochemical study on the intercalation properties of hydroxyl anion for the reversible conversion of graphene quantum dots into carbon dots

“…Detail of these characterization has been reported in detail in our previous study [52] Briefly specific and high resolution scan of C 1s (Fig. 15.A) showed several peaks at ~290 eV, respectively, which corresponded to C-C, C-O, C=O, and COOH, respectively [59]. Moreover, the O 1s spectrum showed two peaks at ~530 eV, which were attributed to C-O and C=O, respectively [60,61].…”