Green Carbon Quantum Dots for Efficient Sensing of Heavy Metal Ions

Abstract

Owing to their unique fluorescence properties, carbon quantum dots (CQDs), the new zero-dimensional carbon nanomaterials have intrigued many research interests. CQDs have attracted massive attention worldwide because of their stunning properties like high solubility, high fluorescence intensity, biocompatibility, low toxicity, and easy surface functionalization. As a result, CQDs can cover various possible applications in many fields including catalysis, medical, light-emitting diodes, energy-related fields, and sensing. The selective and sensitive detection of heavy metal ions using CQDs involves exploiting the unique properties of these nanomaterials, particularly their fluorescence behavior. The use of green carbon quantum dots (CQDs) for detecting heavy metal ions is an area of growing interest due to the eco-friendly nature of the synthesis process and the unique properties of CQDs. Green synthesis typically involves using natural extracts, such as plant extracts or waste materials to produce CQDs. In this chapter, we will summarize and discuss the synthesis methods, surface passivation and functionalization, stability, mechanism of fluorescence sensing, and applications of CQDs for selective and sensitive detection of heavy metal ions. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.