pH Effect on the Size of Graphene Quantum dot Synthesized by Using Pulse Laser Irradiation

In this study graphene oxide (GO) was synthesized by using Hummer’s method. Low dimension graphene quantum dot nanoparticles (GQDs) were synthesized using pulse laser irradiation. Fourier Transform-Infrared Spectroscopy (FTIR), Ultraviolet-Visible (UV-Vis) spectroscopy and photoluminescence (PL) analysis were applied to study the GQDs characteristic. Scanning electron microscopy illustrated the morphology of GQDs and RGQDs. The results showed that the solution’s pH has an effect on the size and bandgap of GQD. We have shown a suitable method to construct GQDs with great bandgap control, which shows a bright horizon for investigating graphene’s potential applications in transparent electronics, transistors, sensors, energy harvesters. The successful attainment was size control by changing pH of solution and low coast synthesis process. The successful achievement was size control by changing pH of solution and low coast synthesis process.