Characterization of food waste-driven carbon dot focusing on chemical structural, electron relaxation behavior and Fe3+ selective sensing

Abstract

In the study, carbon dot (CD) with high fluorescence properties was obtained via one-step hydrothermal carbonization of food model and sandwich leftover, respectively. The data in the article represent the change of the chemical structure and PL properties of the food waste-driven carbon dot (FWCDs). In higher carbonization temperature, pyridinic N and graphitic N were increased while amino N and pyrrolic N was decreased. The lifetime was increased with the increase of temperature. The CD prepared from sandwich leftover showed the dependency of the emission on the exciting wavelength and excellent Fe 3+ sensitivity without significant change of lifetime. It also had a pH-sensitive fluorescence feature and good stability in NaCl solutions. For more insight, please see Food waste-driven N-doped carbon dots: Applications for Fe 3+ sensing and cell imaging Ahn et al., 2019.

Cranberry Beans Derived Carbon Dots as a Potential Fluorescence Sensor for Selective Detection of Fe3+ Ions in Aqueous Solution

“…The Fe 3+ ion sensing properties of the other CDs as the FL sensors are summarized in Table . The results denote that the developed method exhibits good selective and sensitive detection of Fe 3+ ions compared with the other reported methods. ,− The developed method had benefits in terms of a low detection limit and broad linear range.…”

The Food–Materials Nexus: Next Generation Bioplastics and Advanced Materials from Agri‐Food Residues

“…Hence, fast‐food and mixed waste from restaurants (which contain complex mixtures of protein, carbohydrates, lipids etc. ), [ 274–276 ] soft drinks, [ 277 ] chewing gums, [ 278 ] animal cartilage [ 279 ] and skins, [ 273 ] fruit bagasse and peels, [ 280 ] among others, have been used to produce CQD. [ 280 ] Production yields, if put in perspective with other food‐sourced biocolloids, are relatively low (≈0.2 wt% from the initial wet FLW); [ 275 ] however, the possibility to use basically any FLW, under given conditions, align with the high value of CQD applications and pushes forward efforts to up‐scale and implement CQD platforms.…”

“…For instance, due to their strong photoluminescence, carbon dots (CDs) (quasi‐spherical carbon nanoparticles with diameters less than 10 nm) and graphene quantum dots (GQDs) (small fragments of graphene with lateral dimensions smaller than 100 nm in a single or a few layers) have shown a great potential for fabricating biopolymer‐based devices and chemical sensors, and both (CDs and GQD) can be obtained from various waste, including FLW. [ 556–559 ] In this direction, the synthesis of CDs (Section 3.1.3) using leftovers from cat feedstock and the sandwich was reported [ 274,276 ] in which the N‐doped core and multifunctional groups on the surface of the CDs resulted in strong fluorescence and high quantum yield, 28% ( Figure 12 1 a). Moreover, Fe 3+ could quench the fluorescence of FLW‐driven CDs selectively, with no interference of other metal ions, indicating that FLW can indeed be a source of high‐value bioproducts to be used in optochemical sensors (Figure 12a) as well as in cell imaging (Figure 12b).…”

A Review on the Hydrothermal Treatment of Food Waste: Processing and Applications

“…Food waste hydrochar is used as other value-added products [15]. For example, food waste could be prepared by hydrothermal carbonization to prepare N-doped carbon dots, which had high selectivity to Fe 3+ fluorescent probes and could be used as bioimaging materials [16].…”