Lignin derived multicolor carbon dots for visual detection of formaldehyde

Improving the revenue of lignin conversion into carbon dots by prior amino modification

“…[2][3][4] The production of carbon dots (CDs) represents one of the most promising recent approaches to extracting high value from lignin, because of the excellent performance of CDs and their capacity to make use of various industrial lignins. [5][6][7] A number of CDs have been reported from lignin that find application in various fields, such as bioimaging, 8 fluorometric detection, 9,10 catalyst support, 11 drug carriers, 12 photo-thermal thermogenesis, 13 and electrodes. 14 In addition, various approaches have been developed to synthesize CDs from lignin, [15][16][17] whereas the hydrothermal method is believed to be the most promising approach, because it is feasible to set up, environmentally friendly (with water as the only solvent), and biocompatible (without the use of hazardous chemicals).…”

Unlocking the graphitization potential of lignin: insights into its transformation through hot pressing and carbonization

“…Being the most abundant renewable polymer in nature with high aromaticity, lignin offers great potential for conversion into value-added carbon-based materials, thereby achieving lignin valorization. 1 Numerous studies have explored various routes for producing lignin-based carbon materials, including activated carbon, 2 carbon fibers, 3 carbon nanofibers, 4 carbon dots, 5 and carbon foams. 6 These materials demonstrate promising prospects of lignin as a precursor for carbon materials.…”

High sensitive assay of formaldehyde using resonance light scattering technique based on carbon dots aggregation

“…Various methods of determining FA in gas samples have been reported, including spectrophotometry (Gorrotxategi-Carbajo et al, 2013), electrochemistry (Zhang et al, 2020a(Zhang et al, , 2020b, chemiluminescence (Song et al, 2009), fluorescence (Liu et al, 2019;Wang et al, 2021), and imaging (Liu et al, 2019) techniques. Various materials have been employed for FA detection, such as ZIF-90-LW (Wen et al, 2020), naphthalimide (Bi et al, 2018), CuO/Cu/TiO 2 nanotubes (Zhang et al, 2020a(Zhang et al, , 2020b, egg white/ZnO (Padmalaya et al, 2022), carbon dots (CDs) (Qu et al, 2020;Lin et al, 2022;Kim et al, 2021;Liu et al, 2021;Li et al, 2023;Zhao et al, 2022;Hu and Gao, 2020), SnSO 4 /ZnO (Chang et al, 2018), C 60 -encapsulated TiO 2 (Gakhar and Hazra, 2021), ZnSnO 3 porous nanostructures (Du et al, 2021), and RGO/HA-HCl (Zhou et al, 2020). However, there are still some limits for these methods such as high cost, high toxic reagent use, as well as the only use in aqueous media or vapor.…”