Affiliation:
1. Biorefinery Laboratory, Latvian State Institute of Wood Chemistry, Dzerbenes Street 27, LV-1006 Riga, Latvia
Abstract
In order to explore the possibilities of increasing the hydrophilicity of carbon-based adsorbents, catalysts, or electrode materials in aqueous solutions, the oxidation of wood-based activated biochar using H2O2 was investigated. The properties of oxidized activated biochar obtained at different activation temperatures (600, 700, and 800 °C) and H2O2 oxidized for 15–180 min were investigated using the characteristics of surface functionality, elemental composition, porous structure, contact angle measurements, FTIR spectroscopy, and immersion calorimetry. It was observed that the optimal oxidation time was different for each sample depending on activation temperature, and the degree of oxidation can be tailored by changing the oxidation time. The course of oxidation depends on the degree of graphitization and functionalization, determined by the activation temperature. It was established that the highest degree of oxidation and increase in wettability is observed for samples with the lowest degree of activation obtained at a temperature of 600 °C.
Reference28 articles.
1. Duta, L., Popescu, A.C., Zgura, I., and Mihailescu, I.N. (2015). Wettability of Nanostructured Surfaces. Wetting Wettability, Intechopen.
2. Wettability of graphene: From influencing factors and reversible conversions to potential applications;Feng;Nanoscale Horiz,2019
3. Ferrero, F., Periolatto, M., Ferrero, F., and Periolatto, M. (2015). Modification of Surface Energy and Wetting of Textile Fibers. Wetting Wettability, Intechopen.
4. Contact angle and wetting properties;Yuan;Springer Ser. Surf. Sci.,2013
5. Probing surface wetting across multiple force, length and time scales;Daniel;Commun. Phys.,2023