Microwave-assisted synthesis of carbon nanodots through an eggshell membrane and their fluorescent application

Abstract

Carbon nanodots (C-Dots) as a new form of carbonaceous nanomaterials have aroused much interest and intensive research due to their inspiring properties. Compared to traditional semiconductor quantum dots, these newly emergent nanodots possess a number of advantageous characteristics, among which low-toxicity is particularly fascinating. More and more research into C-Dots have focused on synthesis methods and biology-related applications. Microwave-assisted approaches have attracted attention because microwave treatment can provide intensive and efficient energy, and as a consequence shorten the reaction time. In this article, we designed a "green", rapid, eco-friendly and waste-reused approach to synthesize fluorescent and water-soluble C-Dots from eggshell membrane (ESM) ashes according to a microwave-assisted process. ESM selected as the carbon source was a common protein-rich waste in daily life and can be obtained easily and cheaply. The C-Dots from our method showed the maximal fluorescence emission peak at 450 nm and the fluorescence quantum yield was about 14%. We further designed a sensitive probe for glutathione based on the fluorescence turn off and on of the C-Dots-Cu(2+) system, which showed a linear range of 0.5-80 μmol L(-1) and detection limit of 0.48 μmol L(-1). In general, the C-Dots prepared briefly and inexpensively from ESM revealed excellent fluorescent property with promising potential for applications such as sample detection and biotechnology.

One-Step Microwave-Assisted Green Synthesis of Luminescent N-Doped Carbon Dots from Sesame Seeds for Selective Sensing of Fe(III)

“…These were then kept for microwave treatment for about 10-15 min. The microwave irradiation results in efficient and uniform heating thereby higher temperature is easily obtained to initiate the synthesis 23 . This results in carbonization of sesame seeds ( Figure 1).…”

Carbon Nanodots: Synthesis, Characterization, and Bioanalytical Applications

“…It is noteworthy that passivation of CDs is not Scheme 1 Bottom-up preparation of CDs by dehydration of carbohydrates strictly required as pyrolysis of only one precursor, sometimes acid or base catalyzed, has also been performed. Examples for such a synthetic route are microwave heating of glycerol [36], dextrin [46], polymers [47], citric acid [48,49], amino acids [50], or even complex material such as egg shell membrane [51], respectively. Microwave-assisted pyrolysis is one of the most popular preparation techniques of CDs due to its high reproducibility and simplicity only outperformed with respect to the number of publications by hydrothermal synthesis.…”

Chemiluminescence of carbon dots induced by diperiodato-nicklate (IV) in alkaline solution and its application to a quenchometric flow-injection assays of paracetamol, L-cysteine and glutathione

“…However, these processes involve complex and extreme synthesis conditions. A rapid, simple and one step microwave mediated method for synthesizing Cdots from organic materials as carbon source was widely used [7][8][9]. Luminescent properties of carbon dots are usually investigated by photoluminescence (PL) produced using photoexcitation [10][11][12], and electrochemiluminescence (ECL) generated by electron injection [13][14][15].…”