Chutipaijit, Sutee

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Preferred name
Chutipaijit, Sutee
Alternative Name
Chutipaijit, S.
Main Affiliation
Email
sutee.ch@kmitl.ac.th

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    Item type:Publication,
    Nanoporous Carbon from Water Hyacinth via Hydrothermal Carbonization assisted Chemical Activation for Dye adsorption
    (2022-07-01)
    Sukulbrahman, Manu
    ;
    Siraorarnroj, Siwat
    ;
    Suksai, Nattaya
    ;
    Kaewtrakulchai, Napat
    ;
    Chutipaijit, Sutee
    Nanoporous carbon was successfully prepared by hydrothermal carbonization with chemical activation using water hyacinth as a raw material. The porous carbon was produced for the adsorption of methylene blue (MB), which is an organic pollutant in wastewater from several industries. The effect of various parameters such as pH, dye concentration and adsorption period time on dye removal were studied. The highest removal efficiency of MB obtained using WH nanoporous carbon was approximately 96.8-99.9% within an adsorption time between 10 and 30 min. The dye removal capacity increased with increasing of period time during the adsorption test. Moreover, the adsorption kinetics of MB during adsorption process was explained by the Langmuir and Freundlich adsorption isotherms.
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    Item type:Publication,
    Coconut Residue-Derived Nanoporous Carbon via Hydrothermal Carbonization for Nanoporous Carbon-Based Supercapacitor Electrodes
    (2025-07-01)
    Ruenroengrit, Kemchat
    ;
    Kunyuan, Jumpon
    ;
    Ruttanadech, Nuttapong
    ;
    Kaewtrakulchai, Napat
    ;
    Puengjinda, Pramote
    The increasing demand for sustainable and cost-effective energy storage solutions has driven interest in biomass-derived carbon materials for supercapacitor electrodes. This study explores the valorization of coconut residue (CR), an abundant agricultural waste, as a carbon precursor for nanoporous carbon (NPC) production. NPC was synthesized via hydrothermal carbonization (HTC) of CR, followed by chemical activation using potassium hydroxide (KOH) at varying temperatures (700, 800, and 900 °C). The effects of activation temperature on the structure and electrochemical performance of the NPC were systematically investigated. The activated materials exhibited amorphous, highly porous structures, with surface areas increasing alongside activation temperature—reaching a maximum of 1969 m<sup>2</sup> g<sup>−1</sup> at 900 °C. Electrochemical characterization was conducted using a three-electrode setup through cyclic voltammetry (CV) and galvanostatic charge–discharge (GCD) in a 1 M Na<inf>2</inf>SO<inf>4</inf> electrolyte. The sample activated at 900 °C with a CR:KOH weight ratio of 1:2.5 achieved the highest specific capacitance of 52 F g<sup>−1</sup> at a specific current of 1 A g<sup>−1</sup>. These findings underscore the potential of CR as a low-cost and sustainable raw material for fabricating efficient electrode materials in energy storage applications.