Green synthesized carbon quantum dots from maple tree leaves for biosensing of Cesium and electrocatalytic oxidation of glycerol

Research progress in the synthesis and biological application of quantum dots

“…In this study, they were able to detect Cs + over a wide range (100 nM to 100 μM) with a LOD of 24 nM. 192 Even for the detection of the same substance, there are many choices of precursor sources and preparation methods for CQDs. Table 2 shows the biosensor CQDs prepared using different preparation methods and precursor systems.…”

“…There are many options for synthesizing CQDs, in which a variety of precursors are used as the carbon source. Various raw materials from biomass have been reported in the literature, which include Tinospora cordifolia leaves, 180 oil palm biomass, 181 areca leaves, 182 corn straw shells, 183 shrimp shells, 184 lemon juice, 185 bread, 186 carrots, 187 gourds, 188 banana peel, 189 starch, 190 Mexican mint leaves, 191 maple leaves, 192 etc. However, the low quantum yield of carbon quantum dots limits their application in many fields, and some studies have been devoted to overcoming this limitation and improving the function of CQDs.…”

Direct and Sensitive Detection of Dopamine Using Carbon Quantum Dots Based Refractive Index Surface Plasmon Resonance Sensor

“…Figure 2 depicts the FTIR spectrum of CQD thin film (black spectrum), which was consistent with previous works and contained a variety of functional groups. The existence of abundant hydroxyl groups at the CQD surface was verified by the presence of the characteristic bands of O–H at the 3929, 3780, 3678, 3530 and 3175 cm −1 peaks [ 52 , 53 , 54 , 55 , 56 ]. The peaks appearing at 3031 and 2882 cm −1 were attributed to C–H stretching vibration [ 52 , 55 , 56 , 57 , 58 , 59 , 60 ].…”

Progress on the luminescence mechanism and application of carbon quantum dots based on biomass synthesis

“…Wang 101 et al used durian fruit pulp as the raw material, mixed it with water and put it into an high pressure reactor with a platinum sheet at the bottom and hydrothermally treated at 150 °C for 12 h. Finally, ultra-high quantum yield (QY = 79%), sulphur-doped graphene quantum dots (S-GQDs) were successfully obtained. Chellasamy 102 et al used maple leaves as the initial carbon source, mixed with water and stirred, then placed in an autoclave for hydrothermal treatment at 190 °C for 8 h. After completion of the reaction, CQDs with blue fluorescence were successfully produced through a series of operations such as filtration, centrifugation and filtration.…”