Carbon dots derived from natural sources and their biological and environmental impacts

Abstract

Carbon dots (CDs) have successfully stood out among numerous materials, attributed to their superior characteristics, including ultra-small size, good photostability, excellent biocompatibility, and tunable fluorescent property. Accompanied with their remarkable...

An insight into the role of carbon dots in the agriculture system: a review

“…This method offers a self-passivated one-step synthesis process, easy heteroatom doping, cost-efficiency, non-toxicity, and highly efficient synthesis. 67,78,79 However, in some cases, time-consuming reactions and low quantum yield (QY) are the main concerns of this method. In the pyrolysis method, the CDs are synthesized by carbonization or pyrolysis of carbon sources at a higher temperature.…”

“…Additionally, the adjustment of synthesis conditions such as the heating rate, reaction temperature, and duration benefits the synthesis of desired CDs. 67,77,78,[80][81][82] In Table S1, † the CDs are synthesized via a bottom-up approach using carbon precursors such as plant extract, fruit pulp, peel, and agricultural waste are listed. We also compared the advantages and disadvantages of this approach to top-down and on this basis, we elucidate the advantages of green CDs over other methods and carbon sources (Table S2 †).…”

Fluorescent Silk Obtained by Feeding Silkworms with Fluorescent Materials†

“…On one hand, carbon sources for the synthesis of carbon dots are very rich, ranging from organic molecules to flowers, trees, fruits, vegetables, grains, animal hair, eggs, milk, and so on. [ 77,79‐82 ] These raw materials for the synthesis of CDs with high fluorescence quantum yield are cheap and nontoxic, which benefit the large‐scale preparation for feeding silkworms. [ 83‐86 ] On the other hand, the properties of CDs are easily adjustable.…”

Biosynthesis of the Narrowband Deep-Red Emissive Carbon Nanodots from Eggshells

“…However, the pollution and waste also reside in the reported chemical routes to synthesize the highly efficient deep-red/NIR emissive CNDs. Recently, several researchers reported that the biomass can be utilized as the recyclable raw precursor to prepare CNDs via carbonization or direct extraction, enabling further applications as the bright deep-red emissive phosphor or bioimaging agents. ,− These biomass-derived CNDs or composites harbor the potential biological applications of versatile CND-based nanomaterials. Hence, it is significant to develop a new safe and pollution-free approach to recycling CNDs from widespread biomass.…”