Influence of Potassium-Based Activation on Adsorptive Properties of Carbon Spheres Modified with Iron(III) Citrate

• Published in: Materials Vol. 16; no. 15; p. 5227
• Main Authors: Pełech, Iwona, Sibera, Daniel, Staciwa, Piotr, Sobczuk, Konrad S, Narkiewicz, Urszula
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 25.07.2023; MDPI
• Subjects: Activated carbon; Adsorption; Adsorptivity; Analysis; Carbon; Carbon dioxide; carbon spheres; Composite materials; Iron; iron modification; Low temperature; Microporosity; Potash; Potassium; potassium activation; Potassium compounds; Spheres; Synergistic effect; Poland; United Kingdom > UK; carbon dioxide; adsorption; potassium activation; iron modification; carbon spheres
• ISSN: 1996-1944; 1996-1944
• DOI: 10.3390/ma16155227

Composites synthesized from iron(III) citrate and carbon spheres, and activated with potassium compounds were prepared and then characterized using XRD, SEM, and low-temperature nitrogen adsorption methods. The adsorption properties of the composites toward carbon dioxide were assessed using CO uptake measurement, as well as by measuring their selectivity toward carbon dioxide, given their further application as photocatalysts for the reduction of this gas. The effect of changing preparation conditions on the structural and adsorption properties of the material was assessed. The potential strength of such material is a synergistic effect between the high adsorption capacity related to the microporosity of carbon spheres combined with the catalytic properties of iron particles.