Improvement of Photo-Catalytic Properties of Graphene by N-Doping

Abstract

Graphene is a two-dimensional, honeycomb-structured material consisting of a uniform monolayerof carbon atoms. Most scientists believe that graphene has revolutionary properties and research on graphene isincreasing exponentially. It is considered as an alternative material that can replace silicon according to itsproperties, and graphene is called the supermaterial of the next century. On the other hand, some applications ofgraphene require the rearrangement of electronic properties. The chemical doping method is one of the mostfrequently used methods for this arrangement. In this study, nitrogen-doped graphene was synthesized bychemical vapor deposition (CVD) method. Urea was used as a nitrogen-doping source. Different amounts ofurea were used to optimize the chemical nitrogen doping process. Raman spectroscopy was used for thecharacterization of the synthesized nitrogen-doped graphene. During the experiments, light (400-700 nmwavelength) was sent to the nitrogen-doped graphene surface with a solar simulator (A-type 150W, 1-3 SUN,Xenon lamp, 1.5 AM Filter). The photo-catalytic properties of the samples were measured by the potentiostatictechnique.