A comprehensive analysis of Sargassum natans-derived inorganic carbon composite for electrochemical charge storage

Kar, Tathagata; González-Escobar, Cecilia; Ramos-Hernández, José Juan; Casales-Díaz, Maura; Flores-Rodríguez, María Fernanda; Pérez, Ramiro; Kesarla, Mohan Kumar

doi:10.1016/j.est.2024.110600

Cited by 1 publication

(1 citation statement)

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“…The composition of Sargassum mainly consists of polysaccharides such as lignin, cellulose, hemicellulose, and alginate. In recent years, the use of its biological properties to prepare various biomass-based materials has been reported, with applications in various fields such as medicine [ 14 ], energy storage [ 15 ], and adsorption [ 16 , 17 ]. Especially in the field of adsorption, Sargassum has been favored by scholars for its complex cell wall structure, abundant phycobiliprotein, fucoidan, sulphated seaweed polysaccharides and high concentration of carboxyl groups, and other biological properties that are conducive to rapid adsorption [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

Turn Waste Golden Tide into Treasure: Bio-Adsorbent Synthesis for CO2 Capture with K2FeO4 as Catalytic Oxidative Activator

Ying,

Jia,

Zeng

et al. 2024

Molecules

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Converting Sargassum horneri (SH)—a harmful marine stranding that can cause golden tide—to highly porous bio-adsorbent material (via one-step catalytic oxidative pyrolysis with K2FeO4) can be a strategically useful method for obtaining low-cost materials suitable for CO2 capture. In this manuscript, the behavior of different mass ratios of K2FeO4/SH precursor acting on the surface physicochemical properties of carbon materials are reported. The results suggest that specific surface area and total pore volume first increased to the mass ratio of K2FeO4/carbon precursor, then decreased. Among the samples prepared, the highest specific surface area was obtained with a K2FeO4/SH precursor ratio of 1:4 (25%-ASHC), and the CO2 adsorption performance was significantly increased and faster compared with the original biochar. The fitted values of the three kinetic models showed that the double exponential model provided the best description of carbon adsorption, indicating both physical and chemical adsorption; 25%-ASHC also exhibited excellent cyclic stability. The improved CO2 adsorption performance observed after K2FeO4 activation is mainly due to the increase in material porosity, specific surface area, and the enrichment of nitrogen and oxygen functional groups.

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