A Strategic Synthesis of Orange Waste-Derived Porous Carbon via a Freeze-Drying Method: Morphological Characterization and Cytocompatibility Evaluation
2024
Angela S. Kaloudi | Panagiota Zygouri | Konstantinos Spyrou | Antrea-Maria Athinodorou | Eirini Papanikolaou | Mohammed Subrati | Dimitrios Moschovas | K. K. R. Datta | Zili Sideratou | Apostolos Avgeropoulos | Yannis V. Simos | Konstantinos I. Tsamis | Dimitrios Peschos | Ioannis V. Yentekakis | Dimitrios P. Gournis
Porous carbon materials from food waste have gained growing interest worldwide for multiple applications due to their natural abundance and the sustainability of the raw materials and the cost-effective synthetic processing. Herein, orange waste-derived porous carbon (OWPC) was developed through a freeze-drying method to prevent the demolition of the original biomass structure and then was pyrolyzed to create a large number of micro, meso and macro pores. The novelty of this work lies in the fact of using the macro-channels of the orange waste in order to create a macroporous network via the freeze-drying method which remains after the pyrolysis steps and creates space for the development of different types of porous in the micro and meso scale in a controlled way. The results showed the successful preparation of a porous carbon material with a high specific surface area of 644 m2 g&minus:1 without any physical or chemical activation. The material&rsquo:s cytocompatibility was also investigated against a fibroblast cell line (NIH/3T3 cells). OWPC triggered a mild intracellular reactive oxygen species production without initiating apoptosis or severely affecting cell proliferation and survival. The combination of their physicochemical characteristics and high cytocompatibility renders them promising materials for further use in biomedical and pharmaceutical applications.
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