Facile synthesized carbon dots for simple and selective detection of cobalt ions in aqueous media

Carbon Dots: Synthesis, Characterizations, and Recent Advancements in Biomedical, Optoelectronics, Sensing, and Catalysis Applications

“…Overall, their results point to the effect of functional groups on CNDs’ quantum yield and detection limit, which will be helpful in the continued development of CNDs for sensing applications. Figure B shows a synthesis schematic of CNDs and cobalt ion detection . Chiayee Salih Ajay et al used mulberry juice as the carbon source in a hydrothermal process to create carbon quantum dots (CQDs) with green photoluminescence.…”

“…Copyright 2023 MDPI AG (Multidisciplinary Digital Publishing Institute). Reproduced with permission from ref . Copyright 2022 Taylor and Francis.…”

“…Figure 24B shows a synthesis schematic of CNDs and cobalt ion detection. 210 Chiayee Salih Ajay et al used mulberry juice as the carbon source in a hydrothermal process to create carbon quantum dots (CQDs) with green photoluminescence. It has been investigated how the maturity of fruit affects its chemical and physical characteristics, particularly its fluorescence spectrum.…”

A portable fiber optic sensor for the luminescent sensing of cobalt ions using carbon dots

“…18 Although reports of luminescent sensors for cobalt are relatively limited, several different material classes have been evaluated for cobalt detection, including metal-organic frameworks, 19–22 metal nanoparticles, 23–27 quantum dots, 28–30 organic molecules, 31–37 silicon nanomaterials, 38 polymers, 39 metal complexes, 40 and graphene/carbon quantum dots. 41–53 However, many of the sensors are not suitable for deployment in low pH environments 19,26,36,40,44,49,54–57 or aqueous systems, 22,32,40 suffer from cross-sensitivity in the sensing response when other metal ions are present, 28,39,41,43,53 and/or require a long or tedious synthetic approach. 21,35,37 Moreover, these luminescent sensors for cobalt have not been evaluated on low-cost, portable platforms that would be required for real-time process monitoring or cobalt prospecting, and often aren’t tested in conditions relevant for coal utilizaiton byproduct streams ( e.g.…”

“…18 Although reports of luminescent sensors for cobalt are relatively limited, several different material classes have been evaluated for cobalt detection, including metal-organic frameworks, [19][20][21][22] metal nanoparticles, [23][24][25][26][27] quantum dots, [28][29][30] organic molecules, [31][32][33][34][35][36][37] silicon nanomaterials, 38 polymers, 39 metal complexes, 40 and graphene/ carbon quantum dots. [41][42][43][44][45][46][47][48][49][50][51][52][53] However, many of the sensors are not suitable for deployment in low pH environments 19,26,36,40,44,49,[54][55][56][57] or aqueous systems, 22,32,…”