Dresden 2026 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 65: Solid-liquid interfaces: Reactions and electrochemistry II
O 65.2: Vortrag
Mittwoch, 11. März 2026, 15:15–15:30, TRE/PHYS
Laser-treated activated carbon derived from date stone for energy storage and environmental remediation applications — •Ahmad Jabr1, Iyad Sadeddin1, Amer El Hamouz1, Hyun Jungb2, and JeongWon Parkb2 — 1An-Najah National university, Nablus, Palestine — 2Dongguk University, Seoul-Campus, Korea
In this study, Activated Carbon (AC) was synthesized via traditional ZnCl* and KOH routes followed by surface modification process using pulsed Nd:YAG laser (1064 nm) under aqueous conditions to produce laser-modified activated carbon (LAC).
Structural and surface analyses revealed that laser introduced new surface functionalities, increased surface roughness, promoted additional micropores and mesopores formation, resulting in 17% enhancement in SSA. Nitrogen adsorption isotherms indicated higher monolayer adsorption and more developed pore volume distribution in LAC compared with AC. Also, LAC exhibited improved surface chemistry with newly developed OCFGs, attributed to laser bombardment effects.
Electrochemical characterizations showed that AC and LAC exhibit typical EDLC behavior, with LAC achieving 70% higher specific capacitance, enhanced energy and power densities, reduced ESR, and better stability after 10000 cycles compared to AC. Furthermore, adsorption studies showed that LAC overcame AC with 400% enhancement in maximum adsorption capacity and initial rate adsorption, signifying improved surface heterogeneity and multilayer adsorption features.
Keywords: Laser-modified activated carbon; Porosity; Supercapacitor; Surface functionalization; Biowaste valorization