Modification of Carbon Dots for Metal‐Ions Detection

Abstract

It is very appealing to develop cheap, highly sensitive and efficient metal ion fluorescence sensors as traditional instrument methods are inherently costly and time‐consuming. Carbon dots (CDs) are widely used for sensing metal ions, attributing to their merits of good biocompatibility, low toxicity, easy surface modification and excellent photostability. This article reviewed the research progress of CDs as metal ion sensors in recent years, and studied their modification methods and detection performances. Finally, the challenges and opportunities of CDs as metal ion sensors were also analyzed. This article is expected to provide inspiration and help for researchers focusing on CDs as metal ion sensors.

An overview on animal/human biomass-derived carbon dots for optical sensing and bioimaging applications

“…The modication of CDs is vital for the improvement of physiochemical features, particularly their optical properties. Recently, Fan et al 98 reviewed the metal ion sensing application of modied CDs. The inherent modications in CDs can be achieved either by heteroatom doping or surface functionalization.…”

“…3,42 Consequently, doped CDs show better possibility for diverse applications due to the improvement in their optical characteristics and QY. 3,42,98 N is one of the most common doping elements (atomic radius of C/ N: 0.0914/0.092 nm), which is incorporated in CDs to improve their uorescence properties. 99 A green precursor (glucose) was HT treated in the presence of NH 3 to produce N-CDs.…”

Preparation of Microcrystalline Cellulose-Derived Carbon Dots as a Sensor for Fe3+ Detection

“…As a new type of carbon nanomaterial, carbon dots (CDs) can be applied in fields as diverse as metal ion detection, light-emitting diodes, biological imaging, drug carriers, fluorescent inks, and photocatalysis, due to their stable optical properties, excellent water solubility, outstanding biocompatibility, and low toxicity [9]. The preparation methods of CDs include hydrothermal or solvothermal methods, chemical ablation, microwave irradiation, ultrasonic treatment, laser ablation, and electrochemical carbonization [10]. A variety of precursor materials are currently available as carbon sources, such as molecular precursors (e.g., citric acids and sugars), biomass precursors (e.g., watermelon peel and milk), and waste precursors (e.g., carbon paper and soot) [11].…”