A Review on Carbon Dots: Synthesis, Characterization and Its Application in Optical Sensor for Environmental...

Area of Science:

• Materials Science
• Nanotechnology
• Environmental Science

Background:

• Carbon dots (CDs) are versatile nanomaterials with applications spanning bioimaging to optoelectronics.
• Their synthesis involves diverse precursors, broadly categorized as green or chemical.
• Recent advancements have focused on optimizing CD properties for specific applications.

Purpose of the Study:

• To review the synthesis of carbon dots (CDs) over the past decade.
• To explore the classification of green and chemical precursors for CD synthesis.
• To highlight the application of CDs in optical sensing for environmental monitoring.

Main Methods:

• Literature review of carbon dot synthesis and applications.
• Classification of green precursors (fruits, vegetables, flowers, etc.) and chemical precursors (acidic, non-acidic).
• Analysis of CD applications in optical sensing for detecting pollutants.

Main Results:

• Carbon dot synthesis has evolved significantly over ten years.
• Diverse green and chemical precursors yield CDs with tunable properties.
• CDs are effective sensing materials for heavy metals, pesticides, and explosives.

Conclusions:

• Continued research into high-quality carbon dot synthesis is crucial.
• Carbon dots offer promising solutions for environmental monitoring and advanced devices.
• This review provides a foundation for future researchers in carbon dot development.