Reduction of graphene oxide by 100 MeV Au ion irradiation and its application as H2O2sensor

Graphene oxide (GO) synthesized from a modified Hummer’s method was reduced (referred, rGO) by using 100 MeV Au ion species and its response to the sense H 2 O 2 was investigated. The changes in the atomic composition and structural properties of rGO after irradiation were studied using x-ray diffraction, Fourier transform infrared spectroscopy and x-ray photo-electron spectroscopy. These results suggested that the removal of the oxygen-containing functional groups and the improvement of the electrochemical performance of reduced graphene oxide (rGO) after ion irradiation. Raman spectroscopic results revealed the increase in the disorder parameter ( I D / I G ) after Au ion irradiation and also the formation of a large number of small sp 2 domains due to the electronic energy loss of ion beam. The resultant rGO was investigated for H 2 O 2 sensing using electrochemical techniques and it showed a good response.