Novel Reducibility-Tunable Carbon Dots for Efficient Radicals Scavenging and Material-Controlled Synthesis

Area of Science:

• Materials Science
• Food Science
• Nanotechnology

Background:

• Developing efficient, non-toxic, and low-cost nano-antioxidants for food preservation is challenging.
• Existing methods require complex material design and mechanism exploration.

Purpose of the Study:

• To synthesize novel reductive carbon dots (r-CDs) using a simple method.
• To evaluate the antioxidant and food preservation capabilities of r-CDs.
• To explore the tunability of r-CDs for material synthesis.

Main Methods:

• Sucrose pyrolysis to synthesize reductive carbon dots (r-CDs).
• Assessing r-CDs' ability to scavenge reactive oxygen and nitrogen species (RONS).
• Evaluating the shelf-life extension of apples and strawberries treated with r-CDs.
• Investigating the effect of nitrogen doping on r-CDs' reducibility and application in gold nanomaterial synthesis.

Main Results:

• Successfully synthesized r-CDs with excellent reducibility and RONS scavenging ability.
• Demonstrated significant preservation effects on apples and strawberries, extending shelf-life.
• Identified hydroxyl groups and carbon core as key contributors to antioxidant properties.
• Showcased tunable reducibility of r-CDs via nitrogen doping for controlled synthesis of gold nanomaterials.

Conclusions:

• r-CDs offer a promising non-toxic, efficient nano-antioxidant solution for food preservation.
• Tunable reducibility of r-CDs opens applications in controlled material synthesis.
• The study provides a new strategy for developing functional carbon nanomaterials.