While significant progress has been made on developing an electrochemical route to GO, existing methods have key limitations regarding their cost and scalability. To overcome these challenges, we employ a combination of highly robust boron-doped diamond (BDD) with a wide electrochemical potential window and commercially available fused deposition modelling (FDM) 3D printing to fabricate a scalable packed-bed electrochemical reactor (PBER) for GO production. The simplicity, cost-effectiveness and unique EGO properties make our current method a viable contender for large-scale synthesis of graphene oxide. Subsequently, we have demonstrated a new efficient technique for 3D printing of conductive PDMS/graphene ink by using an emulsion method to form a uniform dispersion of PDMS nanobeads, EGO and PDMS precursor binder. The formulated nanocomposite ink exhibits high storage moduli and yield stress that can be employed for Direct Ink Writing (DIW) 3D printing.