TY - JOUR
TI - Advanced synthesis of carbon dots novel insights into temperature effect on fluorescent performance
AU - Shen Shen
AU - Fu Jia-Jia
AU - Wang Hong-Bo
AU - Gao Wei-Dong
JN - Thermal Science
PY - 2019
VL - 23
IS - 4
SP - 2453
EP - 2459
PT - Article
AB - As a new generation of semiconductor reinforcements, fluorescent carbon dots  have unpredictable and potential applications in bioimaging, photocatalysis,  and optoelectronic devices. This work shows an environmentally friendly  process for carbon dots preparation using citric acid monohydrate and urea.  The influence of different parameters on luminous property was carefully  studied based on the photoluminescence intensity measurement, including  synthesis temperature, time and the concentration of carbon sources and  deactivator. Then the synthesized products were further characterized by  TEM, FT-IR, XPS, UV-vis, and XRD. Highest fluorescence intensity could be  achieved under the carbon sources and deactivator concentration of 0.3 mol/L  and 1 mol/L, respectively, in a total reaction system of 40 ml at 190°C  for 18 hours. The screening analysis revealed that synthesis temperature has  a strong correlation with the photoluminescence intensity. This study  provides further insights into designing high fluorescent performance for  carbon dots preparation.