Synthesis and characterization of carbon quantum dots by electrochemical method using ethanolamine and ethanol

Publish Year: 1397
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:

NICEC16_660

تاریخ نمایه سازی: 7 خرداد 1398

Abstract:

Carbon Quantum Dots (CQDs) are a new class of carbon-based nanomaterials that have attracted researcher’s attention because of their photovotaic properties In this work, CQDs were synthesized by the electrochemical method under DC voltage of 60 V, during 8 h using ethanol or ethanolamine as the electrolyte material and the effect of temperature was studied in the range of 25 to 120°C. Synthesized CQDs were characterized by using TEM and FTIR analysis, and, optical properties were investigated by UV-Visible Spectroscopy. The results revealed the absorption edge of synthesized CQDs had red-shifted absorption from 348 to 389 nm using ethanol and ethanolamine respectively, at 70°C synthesis temperature. Application of ethanolamine could produce CQDs doped with nitrogen and the TEM analysis results showed that particles were formed with two different sizes distribution around 5-10 and 20-25 nm. Increasing temperature caused a higher rate of formation and resulted in more absorption edge red-shift of the formed CQDs.

Authors

Ghazaleh Mirakhori

School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran

Shohreh Fatemi

School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran

Afsaneh Mozdbar

Fouman Faculty of Engineering, College of Engineering, University of Tehran, Iran

Fatemeh Sadat Talatori

School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran