Controllable functionalization of carbon dots as fluorescent sensors for independent Cr(Ⅵ), Fe(Ⅲ) and Cu(Ⅱ) ions detection

Preparation of Ganoderma Lucidum Bran-Based Biological Activated Carbon for Dual-Functional Adsorption and Detection of Copper Ions

“…Tan et al [ 38 ] selected pyrolyzed sago waste to generate CDs as potential probes for metal ion sensing, with an LOD of 7.80 μmol L −1 in the concentration range of 0–48 μmol L −1 . Zheng et al [ 39 ] functionalized CDs and achieved an LOD of 5.00 μmol L −1 in the range of 0.5 to 10 μmol L −1 . Hydrophobic CDs were also synthesized by the one-pot method, with an LOD of 0.2 μmol L −1 [ 40 ].…”

Applications of Carbon Dots for the Photocatalytic and Electrocatalytic Reduction of CO2

“…It consists in applying a static potential between two electrodes acting as the carbon sources, including CNTs [ 48 ], graphite rods [ 49 , 50 , 51 , 52 ], and reduced graphene oxide films [ 53 ]. Furthermore, GQDs have been produced via electrochemical exfoliation in large scale by applying a constant voltage of 15 V between a pre-baked carbon anode and stainless steel (cathode) [ 54 ], or from two clean carbon rods placed in parallel in deionised water, with static potential of 15–60 V [ 55 ]. Finally, other top–down techniques following physical routes can be found in the literature, such as microwave (MW) irradiation [ 56 ] and ultrasounds [ 57 , 58 ], but they are less common.…”

“…Moreover, GQDs usually require heteroatom doping, mostly with nitrogen, to enhance their photoluminescent or catalytic properties. Top–down synthesized GQDs have been N-doped by thermal treatment with ammonia solution [ 52 , 55 ] or in situ with solvents, such as dimethylformamide (DMF) [ 17 , 59 ], which decompose at high temperatures forming ammonia and other compounds.…”

An ESIPT-based fluorescent probe for the detection of multiple analytes and a facile approach to discriminate between arsenate and pyrophosphate in water

“…Thus, the selective and sensitive detection of Cr 3+ ions in environmental and biological samples is required [18,19]. Although many chemical sensors for Cr 3+ have been designed, most of them are unsuccessful in detecting Cr 3+ ions in an aqueous medium, making them unsuitable for practical application [20][21][22][23][24][25][26][27][28][29].…”

“…18,19 Although many chemical sensors for Cr 3+ have been designed, most of them are unsuccessful in detecting Cr 3+ ions in an aqueous medium, making them unsuitable for practical applications. [20][21][22][23][24][25][26][27][28][29] Therefore, it is essential to design new water-friendly chemical sensors for the sensitive detection of Cr 3+ .…”