• N Jeevitha
• Senthil V
• Suresh P
• Kavitha J
• Chelladurai C

A simple and low cost synthetic stratergy is used to prepare Nitrogen-doped Graphene Quantum Dots (N-GQDs) through the hydrothermal treatment. The peak shift and formation of new peaks at 26.17° and 43.77° confirmed the doping of nitrogen (N) into GQDs by XRD spectrum. The Raman spectrum identifies the decrement in ID/IG value could indicate the removal of hydroxyl and epoxy groups by the hydrothermal treatment. TEM image reveals that the highly crystalline nature and SAED pattern yields the ring shaped pattern.The line profile analyses of the diffraction fringes shows good agreement with the SAED pattern. The UV-vis absorption peak at λ = 235 nm corresponds to the π → π* transition of the aromatic C-C bonds and the peak at 297 nm is attributed to n → π* transition of C=O bonds. PL emission shows the strong electron affinity of N atoms doped in the graphene oxide by blue shift of peak maximum. The presence of N atoms in GQDs induces the separation of electron-hole pair under UV light and completes the degradation of dye in 110 mins. It suggests that such material exhibit good photocatalytic activity towards the redgradation of Rhodamine B.

Keywords: Graphene oxide; hydrothermal synthesis; photocatalysis; UV-vis absorption

"Facile synthesis of highly efficient Nitrogen-doped Graphene Quantum Dots for Photocatalytic degradation of Organic pollutants", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.645-654, June 2019, Available :http://www.jetir.org/papers/JETIR1906Z88.pdf

"Facile synthesis of highly efficient Nitrogen-doped Graphene Quantum Dots for Photocatalytic degradation of Organic pollutants", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp645-654, June 2019, Available at : http://www.jetir.org/papers/JETIR1906Z88.pdf