1 23 Arabian Journal for Science and Engineering ISSN 2193-567X Arab J Sci Eng DOI 10.1007/s13369-018-3648-6 Fast and Fully Scalable Synthesis of Graphene Oxide from Cellulose by Catalytic Acid Spray Method (CAS) Mahmoud Fathy, Th. Abdel Moghny & Mahmoud Ahmed Mousa