Eiad-Ua, Apiluck

Preferred name

Eiad-Ua, Apiluck

Alternative Name

Eiad-ua, Apiluck

Eiad-Ua, A.

Eiadua, A.

Main Affiliation

Integrated Innovative Technology

apiluck.ei@kmitl.ac.th

Now showing 1 - 10 of 14

Some of the metrics are blocked by your
consent settings
N-doped Porous Carbon from Palm Male Flower via Hydrothermal Carbonization
(2020-07-30)
Verasarut, Panupong
;
Liamprawat, Tanatorn
;
Kaewtrakulchai, Napat
;
Chutipaijit, Sutee
;
Panomsuwan, Gasidit
N-doped porous carbon materials were produced from palm male flower using hydrothermal carbonization processes at 200 C for 24 h followed by N-Doping and carbonization at 700C for 2 h. N-doping was carried out by impregnation using NH4OH at 0.5, 1.0, 1.5 M and 2 M. Products were characterized by means of chemical composition and morphology using SEM, XPS, and XRD to characterize specific properties such as physical morpholog, porosity, elemental composition on surface and crystalline structure of PMF. After applying hydrothermal carbonization processes, the results showed substantially increased porosity and surface area with suitable microstructure for N-doped electrodes applications. The highest porosity was obtained at NPC-1.5 M.
Some of the metrics are blocked by your
consent settings
Valorization of horse manure conversion to magnetic carbon nanofiber for dye adsorption by hydrothermal treatment coupled with carbonization
(2024-06-01)
Kaewtrakulchai, Napat
;
Chanpee, Sirayu
;
Pasee, Warit
;
Putta, Ampol
;
Chutipaijit, Sutee
Pollution of water resources has recently increased as a result of expanded industrial activity. Recycling waste biomass into bio-adsorbent material offers a cheap, easy, and eco-friendly solution. In this study, magnetic carbon nanofibers (MCNF) with a highly porous structure were developed from magnetite-preloaded horse manure by hydrothermal treatment followed by carbonization using different ratios of iron (III) nitrate and iron oxide as magnetic precursors. The produced MCNF had a very porous structure with specific surface area of 435.31 m2/g and high carbon content. The magnetic characteristics of MCNF promoted by the presence of iron oxide species. The saturated magnetization of MCNF obtained from a 5:5 ratio of the magnetic precursors (iron (III) nitrate: iron oxide) was 2.48 emu/g. Synthesized MCNF was applied as a bio-adsorbent for methylene blue (MB) removal from aqueous solution, with results showing excellent dye adsorption of 92–99 %. MB adsorption was facilitated by pore filling, electrostatic contact, hydrogen bonding, and ion complexation. Experimental results indicated that the Freundlich isotherm and pseudo-second-order kinetic models concurred with the observed MB adsorption data, suggesting that the adsorption mechanism involved multilayered micropore interactions between magnetite and MB chemisorption. The resulting magnetic adsorbent was successfully removed from the aqueous solution by physical separation. Findings indicated that horse manure-derived MCNF could be used as an efficient bio-adsorbent to remove organic contaminants in wastewater.
Some of the metrics are blocked by your
consent settings
Cattail leaf-derived nitrogen-doped carbons via hydrothermal ammonia treatment for electrocatalytic oxygen reduction in an alkaline electrolyte
(2022-07-12)
Panomsuwan, Gasidit
;
Eiad-ua, Apiluck
;
Kaewtrakulchai, Napat
;
Seizawa, Ai
;
Ishizaki, Takahiro
Cattail leaf-derived nitrogen-doped carbons (CL-NCs) were prepared by hydrothermal treatment in ammonia solution and subsequent pyrolysis for application as catalysts for the oxygen reduction reaction (ORR). The ammonia concentration was varied at 1.0, 1.5, and 2.0 M to alter the nitrogen doping content. The characterization results revealed that CL-NCs exhibited an amorphous structure, while the density of structural defects increased as the ammonia concentration increased. The CL-NC prepared without hydrothermal ammonia treatment had a nonporous structure with a low specific surface area (5 m2 g−1). With hydrothermal ammonia treatment, CL-NCs exhibited a micro–mesoporous structure with a higher surface area (113–496 m2 g−1); however, the surface area was significantly diminished at higher ammonia concentrations due to the deterioration of the pore structure. The nitrogen-doping content in CL-NCs varied from 0.65 to 1.55 atom% with the predominant ratios of pyridinic-N and graphitic-N. For electrochemical evaluation in an alkaline electrolyte (0.1 M KOH), CL-NC prepared at an ammonia concentration of 1.0 M showed the highest ORR activity among all samples, as indicated by the most positive onset potential (−0.05 V vs. Ag/AgCl) and half-wave potential (−0.22 V vs. Ag/AgCl) as well as the highest diffusion-limiting current density with a more favorable reduction via a direct four-electron pathway (n = 3.23–3.52). The ORR activity of CL-NCs had a similar trend to their specific surface area rather than nitrogen doping content, indicating the important role of surface area and porosity in enhancing the ORR activity. Moreover, it possessed excellent stability under long-term operation and exposure to methanol. The results obtained in this work could be helpful information for the further development and utilization of biomass-derived NCs for ORR catalysts.
Some of the metrics are blocked by your
consent settings
Synthesis of porous carbon materials from water hyacinth via hydrothermal carbonization assisted chemical activation for carbon-based electrode applications
(2020-10-26)
Liamprawat, Tanatorn
;
Verasarut, Panupong
;
Kaewtrakulchai, Napat
;
Panomsuwan, Gasidit
;
Chutipaijit, Sutee
Recently, lignocellulosic materials have been widely utilized as feedstocks for several applications such as carbon, biofuels and biochemical productions because of their potentials (i.e. waste reduction, carbon sequestration, renewable). In this study, porous carbon was successfully synthesized from water hyacinth (WHs) via hydrothermal carbonization assisted with chemical activation using Na2CO3 and K2CO3. The hydrothermal carbonization process was studied in the range of 160-200°C for 4-12h and the hydrothermal chars were then further pyrolyzed under a supply of N2 flow 100ml/min at 700-900°C for 2h. The as-pyrolyzed chars were then activated by two different bases including Na2CO3 and K2CO3 at the ratio of 1.0 (w/w, hydrothermal char: chemical) to obtain highly porous carbon. The results indicated that carbon percentage, surface area and porous structure were improved with the higher hydrothermal temperature showing the best results at 180°C for 8h. Moreover, the development of pore structure of WHs porous carbon was successfully by chemical activation with K2CO3.
Some of the metrics are blocked by your
consent settings
Green Synthesis of Activated Carbons from Coconut Coir Dust via Steam Activation for Supercapacitor Electrode Applications
(2025-12-01)
Kongtip, Jirayu
;
Kanjulkeat, Natapol
;
Ninneit, Thanapol
;
Phanapadipong, Norapat
;
Chaiammart, Nattapat
Activated carbons derived from coconut coir dust were synthesized via a two-step process combining carbonization and steam activation for application as electrode materials in supercapacitors. The influence of carbonization temperature (500–700 °C) on the morphological, structural, textural, and electrochemical properties of the resulting activated carbons was systematically investigated. Increasing the carbonization temperature led to a progressive collapse of the cellular structure and formation of a more compact and thermally stable carbon matrix, while the overall morphology remained largely unchanged after steam activation. The steam-activated carbon prepared from the carbonized sample at 700 °C (SA-CCD-7) exhibited the highest specific surface area (889 m2 g−1) and a well-developed hierarchical micro–mesoporous structure. Structural analyses confirmed the amorphous nature and an increase in structural disorder after activation, consistent with the enhanced pore development. Electrochemical measurements in 6 M KOH using a three-electrode system revealed that the SA-CCD-7 displayed a typical electric double-layer capacitor (EDLC) behavior, delivering the highest specific capacitance of 86 F g−1 at 1 A g−1 and retaining 81% of its initial capacitance at 20 A g−1, demonstrating excellent rate capability. The symmetric coin-cell supercapacitor device assembled with SA-CCD-7 as the electrodes achieved an energy density of 0.9–1.2 Wh kg−1 and a power density of 50–2500 W kg−1, along with remarkable cycling stability over 10,000 cycles with negligible capacitance loss. These findings highlight steam activation of coconut coir dust as a simple, scalable, and eco-friendly approach for producing biomass-derived carbon electrodes for sustainable energy storage applications.
Some of the metrics are blocked by your
consent settings
Nitrogen-doped carbon derived from horse manure biomass as a catalyst for the oxygen reduction reaction
(2022-06-14)
Panomsuwan, Gasidit
;
Hussakan, Chadapat
;
Kaewtrakulchai, Napat
;
Techapiesancharoenkij, Ratchatee
;
Serizawa, Ai
A massive amount of animal biomass is generated daily from livestock farms, agriculture, and food industries, causing environmental and ecological problems. The conversion of animal biomass into value-added products has recently gained considerable interest in materials science research. Herein, horse manure (HM) was utilized as a precursor for synthesizing nitrogen-doped carbons (NCs) via hydrothermal ammonia treatment and the post pyrolysis process. The ammonia concentration varied between 0.5, 1.0, and 1.5 M in the hydrothermal process. From the comprehensive characterization results, horse manure-derived nitrogen-doped carbons (HMNCs) exhibited an amorphous phase and a hierarchical nanoporous structure. The specific surface area decreased from 170.1 to 66.6 m2 g−1 as the ammonia concentration increased due to micropore deterioration. The nitrogen content was 0.90 atom% even with no ammonia treatment, indicating self-nitrogen doping. With hydrothermal ammonia treatment, the nitrogen content slightly enhanced up to 1.54 atom%. The electrocatalytic activity for the oxygen reduction reaction (ORR) of HMNCs in an alkaline solution was found to be related to nitrogen doping content and porous structure. The ORR activity of HMNCs mainly proceeded via a combination of two- and four-electron pathways. Although the ORR activity of HMNCs was still not satisfactory and comparable to that of a commercial Pt/carbon catalyst, it showed better long-term durability. The results obtained in this work provide the potential utilization of HM as a precursor for ORR catalysts and other related applications.
Some of the metrics are blocked by your
consent settings
Chemically activated carbons derived from cashew nut shells as potential electrode materials for electrochemical supercapacitors
(2025-06-01)
Chaiammart, Nattapat
;
Vignesh, Veeramuthu
;
Thu, Myo Myo
;
Eiad-ua, Apiluck
;
Maiyalagan, Thandavarayan
Supercapacitors are widely recognized as energy storage solutions due to their high power densities and long cycle lives. Furthermore, there is growing scientific and technological interest in converting biomass waste into carbon materials for manufacturing supercapacitor electrodes. In addition to their abundance and cost-effectiveness, the appeal of carbons derived from biomass lies in their tunable porosity, which enables the rational design of carbon materials to achieve the desired performance of supercapacitors. Here, we present the synthesis of activated carbons from cashew nut shells via potassium hydroxide (KOH) activation at different temperatures (650, 750, and 850 °C). The resulting materials exhibited amorphous and predominant microporous structures. Increasing the activation temperature led to a rise in specific surface area from 1534 to 2034 m2 g−1 and an increased proportion of mesopores. The electrochemical properties of these activated carbons for supercapacitor applications were investigated by cyclic voltammetry, galvanostatic charge–discharge, and impedance spectroscopic techniques in a 1 M sodium sulfate (Na<inf>2</inf>SO<inf>4</inf>) electrolyte. Using a three-electrode system, the activated carbons treated at 750 °C exhibited a maximum specific capacitance of 106 F g−1 at a current density of 0.5 A g−1 with a good rate capability; they retained 75 % at 10 A g−1 over a 1.0 V voltage window. Furthermore, a symmetric supercapacitor coin-cell, fabricated with activated carbons treated at 750 °C as the positive and negative electrodes, demonstrated an energy density of 2.43 Wh kg−1 at a power density of 1002 W kg−1. The cell exhibited 87 % capacitance retention at 1.0 A g−1 after 10,000 cycles. This work showcases the efficient and sustainable utilization of cashew nut shells as a carbon source for supercapacitor applications and highlights their value in a circular economy.
Some of the metrics are blocked by your
consent settings
Fundamental study of carbon materials from empty fruit bunch via hydrothermal carbonization with H3PO4 and naoh activation
(2020-01-01)
Guntagerng, Kanogpan
;
Panomsuwan, Gasidit
;
Fuji, Masayoshi
;
Eiad-ua, Apiluck
Lignocellulosic biomass has great potential as an energy source or feedstock for further conversion. Empty fruit bunches (EFBs) were agricultural waste materials from palm oil production. In this research, we aim to study the morphology of hydrochars derived from EFBs via hydrothermal treatments with phosphoric acid (H<inf>3</inf>PO<inf>4</inf>) and sodium hydroxide (NaOH) activation at different concentrations (i.e., 0.5, 0.7, and 1 M) at 200°C for 12 h, followed by carbonization at 700°C under nitrogen atmosphere for 2 h. The samples were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy and specific surface analysis. After carbonization, the hydrochar activated by 1.0 M H<inf>3</inf>PO<inf>4</inf> possessed the highest surface area of 590 m2/g with the dominance of micropores. Hydrothermal carbonization with acid-base activation showed an effective method in preparing high porous activated carbon from EFB.
Some of the metrics are blocked by your
consent settings
Horse manure derived nitrogen-doped porous carbon via hydrothermal carbonization for promising applications
(2020-01-01)
Liamprawat, Tanatorn
;
Verasarut, Panupong
;
Kaewtrakulchai, Napat
;
Panomsuwan, Gasidit
;
Fuji, Masayoshi
Horse manure, organic waste from livestock, has been used for the production of nitrogen-doped porous carbons (NPC) which could be applied as functional material. The variety of different NH4OH solution concentrations (0.5, 1, 1.5, 2 M) were introduced in hydrothermal treatment as activating agent. Also, the nitrogen precursor was served. Horse manure derived NPC were characterized through varied physicochemical properties including NPC yields, FTIR, SEM, XPS and N2 sorption analyzer to characterize specific properties such as elemental composition on surface, surface functional bonding, physical morphology, and porosity of NPC. In addition, the incorporation of nitrogen dopant into the carbon was intended to further enhance the electrochemical performance.
Some of the metrics are blocked by your
consent settings
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 m2 g−1 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−1 at a specific current of 1 A g−1. These findings underscore the potential of CR as a low-cost and sustainable raw material for fabricating efficient electrode materials in energy storage applications.

Eiad-Ua, Apiluck

Filters

Settings

Sort By

Results per page