Print Email Facebook Twitter Fabrication and characterization of graphene-based carbon hollow spheres for encapsulation of organic corrosion inhibitors Title Fabrication and characterization of graphene-based carbon hollow spheres for encapsulation of organic corrosion inhibitors Author Haddadi, S. (Sharif University of Technology) Ramazani, S. A.A. (Sharif University of Technology) Mahdavian, M. (Institute for Color Science and Technology) Taheri, P. (TU Delft (OLD) MSE-6) Mol, J.M.C. (TU Delft (OLD) MSE-6) Date 2018 Abstract In this work, we synthesized carbon hollow spheres (CHSs) using the silica templating method, encapsulated 2-mercaptobenzimidazole (MBI) inhibitor in the CHSs and evaluated their corrosion inhibition performance upon exposure of mild steel to a saline solution containing the released inhibitor. The effects of silica template surface modification on the CHS structure was evaluated, while the structure and morphology of the synthesized CHS was analyzed using field emission scanning electron microscope (FE-SEM), transmission electron microscope (TEM), Raman spectroscopy and X-ray diffraction (XRD) spectroscopy. Furthermore, thermogravimetric analysis (TGA), energy-dispersive X-ray spectroscopy mapping (EDS-mapping) and UV–vis were employed to evaluate the MBI release from carbon capsules at different pH values. Corrosion protection performance of the doped CHS was evaluated using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The results showed tunability of the shell structure between an amorphous carbon and graphene structure using surface modification of the silica templates. Moreover, the MBI release from the CHSs showed to be pH-dependent allowing smart protection of mild steel when exposed to corrosive conditions. Subject Carbon hollow sphereCorrosion inhibitorGraphene-structureHard template To reference this document use: http://resolver.tudelft.nl/uuid:56ae22f0-0b4a-4909-87cb-bb8af6d6d08d DOI https://doi.org/10.1016/j.cej.2018.06.063 Embargo date 2018-12-15 ISSN 1385-8947 Source Chemical Engineering Journal, 352, 909-922 Bibliographical note Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2018 S. Haddadi, S. A.A. Ramazani, M. Mahdavian, P. Taheri, J.M.C. Mol Files PDF 1_s2.0_S138589471831101X_main.pdf 5.32 MB Close viewer /islandora/object/uuid:56ae22f0-0b4a-4909-87cb-bb8af6d6d08d/datastream/OBJ/view