Amarnath, Chellachamy Anbalagan Hong, Chang Eui Kim, Nam Hoon Ku, Bon-Cheol Kuila, Tapas Lee, Joong Hee 2024-01-20T16:31:06Z 2024-01-20T16:31:06Z 2021-09-05 2011-09 0008-6223 https://pubs.kist.re.kr/handle/201004/130022 The efficient synthesis of graphene sheets using pyrrole as a reducing agent was explored. The obtained graphene sheets were dispersible in organic solvents such as ethanol, isopropanol, N,N-dimethylformamide, N-methylpyrrolidone, dimethylsulfoxide, tetrahydrofuran, and acetone. During this reduction reaction, pyrrole was oxidized, forming oxidation product of pyrrole and adsorbed on the graphene sheets surface by pi-pi interaction. The oxidation product of pyrrole acted as a capping agent for graphene sheets by preventing re-stacking and formed organically dispersible graphene. The formation of graphene and its crystalline nature was indicated by the transmission electron microscopy and the atomic force microscopy analysis. Raman, X-ray photoelectron spectroscopy and X-ray diffraction provided the evidence for graphene formation from graphene oxide precursor. Furthermore, the reduced oxygen content and N 1s peak observed by the X-ray photoelectron spectroscopy analysis of graphene sheets confirmed the reduction reaction and presence of adsorbed oxidation product on the surface of graphene sheets. The resulting graphene sheets were readily dispersible in solvents and easily to process. (C) 2011 Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD FACILE SYNTHESIS GRAPHITE OXIDE REDUCTION OXIDATION ROUTE Efficient synthesis of graphene sheets using pyrrole as a reducing agent Article 10.1016/j.carbon.2011.04.048 1 CARBON, v.49, no.11, pp.3497 - 3502 CARBON 49 11 3497 3502 scie scopus 000292663400011 2-s2.0-79958296882 Chemistry, Physical Materials Science, Multidisciplinary Chemistry Materials Science Article FACILE SYNTHESIS GRAPHITE OXIDE REDUCTION OXIDATION ROUTE graphene pyrrole chemical reduction graphene oxide