Ethylene removal by adsorption and photocatalytic oxidation using biocarbon –TiO2 nanocomposites Regadera-Macías, Ana M. Morales Torres, Sergio Pastrana Martínez, Luisa María Maldonado Hodar, Francisco José Adsorption Heterogeneous photocatalysis TiO2 Nanorods Activated carbon Ethylene This work was financially supported by the projects: ref. PCI2020-112045 from MCIN/AEI/10.13039/501100011033 and European Union Next Generation EU/PRTR, as part of the PRIMA Programme (Nano4Fresh project). A.M.R.-M. acknowledges the National Youth Guarantee System (nº 8165) and European Social Fund (FSE) for the training contract. S.M.-T. (RYC-2019-026634-I) and L.M.P.-M. (RYC-2016-19347) are grateful to MICIN/AEI/10.13039 /501100011033 and FSE “El FSE invierte en tu futuro” for their Ramon y Cajal research contracts. “Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente” of the University of Granada (UEQ-UGR) is gratefully acknowledged for the technical assistance. A series of adsorbents and photocatalysts were developed using agricultural residues (olive stones) as raw materials. Activated carbons (ACs) were synthesized by physical activation and posteriorly, impregnated with TiO2 by a hydrothermal method. Both adsorbents (ACs) and composites (carbon-TiO2) were texturally, morphologically and chemically characterized by using complementary techniques (i.e., SEM, gas adsorption, TG, XRD, pHPZC, and so on) and then, the affinity of these samples for the ethylene molecules was tested in columns under dynamic conditions. The corresponding breakthrough curves were determined obtaining the amounts adsorbed at the breakthrough and saturation points. Finally, the photooxidation of ethylene to CO2 using carbon-TiO2 composites was analysed under UV-Vis and near UV-Vis irradiations. The physicochemical characteristics of supports and composites were correlated with their ability to remove ethylene, looking to identify the parameters allowing to improve the performance of the samples. 2025-12-29T20:01:49Z 2025-12-29T20:01:49Z 2023 preprint Published version: Regadera-Macías, A. M.; Morales Torres, S.; Pastrana Martínez, L. M. y Maldonado Hodar, F. J. Ethylene removal by adsorption and photocatalytic oxidation using biocarbon –TiO2 nanocomposites. Catalysis Today Volumes 413-415 (2023) 113932. https://doi.org/10.1016/j.cattod.2022.10.014 0920-5861 1873-4308 https://hdl.handle.net/10481/109130 10.1016/j.cattod.2022.10.014 eng http://creativecommons.org/licenses/by-nd/4.0/ open access Attribution-NoDerivatives 4.0 Internacional Elsevier