Browsing by Author "Saka, Cafer"

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Activated Carbon Production From Pine Cones by Using Microwave Method and Methylene Blue Adsorption
(2014) Özhan, Abdurrahman; Küçük, Mehmet Maşuk; Saka, Cafer
Endüstriyel uygulamaların birçoğu için vazgeçilmez olan aktif karbon, özellikle adsorpsiyon proseslerinde, su filtrelerinde, gaz maskelerinde ve savunma sanayindeki kullanımından dolayı büyük öneme sahiptir. Fakat hammadde maliyeti ve üretim proseslerinin yüksek enerji tüketimi gibi faktörler aktif karbon üretim maliyetini oldukça artırmaktadırlar. Bu tez çalışmasında, mevcut yöntemlere alternatif olarak geliştirilen mikrodalga aktivasyon yönteminin kullanılmasıyla çam kozalaklarından aktif karbon üretimi yapılmıştır. Çalışmada, granül haline getirilmiş olan çam kozalakları, ayrı ayrı kaplarda ve belirli konsantrasyonlarda (%10, %20, %30, %50, %70 ve %100) hazırlanmış olan çinkoklorür (ZnCl2) çözeltilerinde 24, 48 ve 72 saat sürelerince bekletilmiş vedaha sonra bu granüller süzdürülüp kurutulduktan sonra 100, 200, 300, 400, 500 ve 700 W değerlerindeki mikrodalga önişlemine ayrı ayrı tabi tutularak karbonizasyon işlemi gerçekleştirilmiştir. Çalışmada, üretilenaktif karbonun adsorpsiyon kapasitesini belirlemek amacıyla metilen mavisi çözeltisi kullanılmıştır.Çalışma sonucunda, kimyasal aktivasyon, mikrodalga etkileşimi ve adsorbsiyon aşamalarında etkili olan parametreler incelenerek en uygun çalışma koşulları belirlenmiştir. Elde edilen ürünlerin karakterizasyonu için elementel analiz, yapısal ve morfolojik analizler (SEM), yüzey alanı (BET) ve gözenek boyut dağılımı analizlerigerçekleştirilmiştir. Çalışma sonucunda ayrıca, çam kozalaklarından üretilen aktif karbonun yüksek yüzey alanı ve mezogözenek içeriğinden dolayı, sularda kirliliğe neden olan organik maddelerin gideriminde adsorbent olarak kullanılabileceği saptanmıştır. Böylece ülkemizde özellikle Karadeniz, Marmara ve Ege bölgelerinde yoğun olarak bulunan çam kozalaklarının aktif karbon üretiminde hammaddeolarak değerlendirilebileceği ve mikrodalga önişlemi ile gerçekleştirilen aktivasyon yönteminin biyokütleden aktif karbon üretimindeönemli bir etkiye sahip olduğu gözlenmiştir. Anahtar Sözcükler: Adsorbsiyon, Aktif karbon, Çam kozalağı, Metilen mavisi, Mikrodalga.
Analytical Methods for Determination of Selective Serotonin Reuptake Inhibitor Antidepressants
(Walter de Gruyter Gmbh, 2011) Senturk, Zuhre; Saka, Cafer; Tegin, Ibrahim
Selective serotonin reuptake inhibitors (SSRIs) are commonly used to treat depression. SSRIs are classified as fluoxetine, paroxetine, escitalopram, citalopram, sertraline, and fluvoxamine. Several methods have been published for the determination of SSRI drugs in pharmaceuticals, biological materials and environmental samples. This review covers the analytical methods described in the literature for the determination of SSRIs and their main metabolites or some compounds belonging to the same SSRI group. The analytical methods are generally chromatography based methods coupled to different detectors, electroanalytical methods, capillary zone electrophoretic methods, and spectrometric methods.
Applications on Agricultural and Forest Waste Adsorbents for the Removal of Lead (Ii) From Contaminated Waters
(Springer, 2012) Saka, Cafer; Sahin, Omer; Kucuk, Mehmet Masuk
At present, there is growing interest in using low cost, commercially available materials for the adsorption of heavy metals. The major advantages of adsorption technologies are its effectiveness in reducing the concentration of heavy metal ions to very low levels and the use of inexpensive adsorbent materials. In this review, agricultural and forest waste adsorbents were used to remove Pb2+ ions in wastewater treatment, and their technical feasibilities were reviewed in studies mainly from 2000 to 2010. They all were compared with each other by metal binding capacities, metal removal performances, sorbent dose, optimum pH, temperature, initial concentration and contact time. Although commercial activated carbon is widely used in wastewater treatment applications, it has high costs. The use of agricultural by-products as adsorbent material to purify heavy metal contaminated water has become increasingly popular through the past decade because they are less expensive, biodegradable, abundant and efficient. Instead of activated carbon, this study was focused on the inexpensive materials such as agricultural and forest waste. It was shown that these alternative adsorbents had sufficient binding capacity to remove Pb2+ ions from wastewater.
Electrochemical Behavior of the Antineoplastic Agent Etoposide at a Graphene-Based Modified Electrode: Its Square-Wave Adsorptive Stripping Voltammetric Determination in the Pharmaceutical Formulations
(Editura Acad Romane, 2018) Talay Pinar, Pinar; Saka, Cafer; Yardim, Yavuz
An electrochemical sensor based on the graphene (GR) was prepared, and used for the determination of etoposide (ETO). The electrochemical behaviors of this compound on GR modified glassy carbon electrode (GR/GCE) were investigated by cyclic voltammetry and square-wave adsorptive stripping voltammetry (SWAdSV). Using SWAdSV, a linear calibration curve was obtained for ETO determination in 0.1 M Britton-Robinson (BR, pH 4.0) buffer solution at +0.56 V (vs. Ag/AgCl) (after 30 s accumulation at 0.1 V). A linear relationship was found between peak currents and the concentration of ETO within 0.025 to 0.5 mu g mL(-1), with a detection limit of 0.0023 mu g mL(-1). The developed method was successfully applied to the determination of ETO in the pharmaceutical formulations with good recoveries.
Enhanced Electrochemical Double-Layer Capacitive Performance With Co2 Plasma Treatment on Activated Carbon Prepared From Pyrolysis of Pistachio Shells
(Pergamon-elsevier Science Ltd, 2020) Sahin, Omer; Yardim, Yavuz; Baytar, Orhan; Saka, Cafer
This study reports an original approach based on the CO2 plasma treatment on modification of the chemical or physical properties of activated carbon(AC) from the pistachio shells as a waste for application as electrochemical double-layer capacitors(EDLC). In the AC production experiments, impregnation ratio, impregnation pre-treatment temperature, activation temperature and activation time are investigated. In the AC modification experiments with plasma treatment, the effects of plasma gases, plasma power and plasma time are performed. The results of the different conditions indicated that the structural properties of the obtained AC were significantly dependent on the plasma and pyrolysis parameters. The surface properties of the raw AC and plasma-treated AC (PTAC) with X-ray photoelectron spectroscopy (XPS), nitrogen adsorption technique, and scanning electron microscope (SEM) are characterized. Surface area values for the raw AC and PTAC are 768 and 1250 m(2) g(-1), respectively. A change in the peak positions and an increase in the percentage of oxygen of the AC treated with CO2 plasma were obtained from XPS results. After 15 min of CO2 plasma activation, a significant increase in the capacitance of up to about 141% was obtained as a 118.4 F g(-1) compared to 49.98 F g(-1) for untreated AC. The results show that the plasma treatment on the specific surface area and surface functional groups of AC has a significant impact. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
Enhanced Supercapacitor Performance of Hierarchical Mesoporous Sulfur-Doped Carbon Particles From Biomass Waste for Energy Storage
(Pergamon-elsevier Science Ltd, 2025) Yardim, Yavuz; Genel, I. lyas; Saka, Cafer
In this study, sulfur doping was carried out on activated carbon derived from biomass waste chestnut shells using a simple process involving activation with sulfuric acid to enhance the specific capacitance of supercapacitors (AC/CS). With the carbon surface becoming more polarized by the sulfonation process, it is aimed to achieve high wettability, which is important for supercapacitors, and to effectively transfer the electrolyte to the pores carbon materials. The resulting activated carbon particles were characterized by EDS, FTIR, SEM, Raman, XPS, nitrogen adsorption and XRD analyses. EIS, CV and GCD analyses were used for electrochemical measurements. At a current density of 2 A/g, there is an approximately 1.68-fold increase in the capacitance value for sulfonated AC/CS@GCE compared to the AC/CS@GCE electrode. The sulfonated AC/CS@GCE electrode showed ideal cycling stability with a capacitance retention rate of similar to 84.7% after 10000 cycles. The Rct values of CS@GCE and sulfonated AC/CS@GCE electrodes were-15.2 Omega and-113 Omega, respectively. The AC/CS@GCE//AC/CS@GCE device can store 4.98 Wh/kg of electrochemical energy with a power density of 161.5 W/kg current density of 2 A/g. At a higher current density of 10 A/g, it can store 2.22 Wh/kg of electrochemical energy with a power density of 799.2 W/kg.
Facile Oxygen-Enriched Hierarchical Porous Carbon Particles Based on Biomass Wastes for Improving the Adsorption of Malachite Green From Aqueous Solutions
(Elsevier, 2025) Genel, Yasar; Genel, Ilyas; Saka, Cafer
The abundance of active groups and the surface areas of adsorbents used for the removal of contaminants such as dyes are very important for the effective adsorption process. For this purpose, the high surface area-activated carbon was obtained by activation of agricultural waste chestnut shells as carbon precursor(CSAC) with sodium hydroxide in the first stage of this study. In the second stage, the doping of oxygen atoms with nitric acid was carried out to further improve the surface properties of this activated carbon (O-doped CSAC). The obtained oxygen-rich activated carbon sample was used as an adsorbent to remove a cationic dye malachite green (MG). EDS, SEM, XRD, FTIR and nitrogen adsorption analyses were used for the characterisation of these activated carbon samples. FTIR, elemental analysis and EDS analyses showed a significant increase in the amount of oxygen groups on the surface. The BET surface area obtained for CSAC had a high surface area of 1548 m(2)/g. Kinetic, thermodynamic and isotherm parameters for the adsorption of MG with O-doped CSAC were determined. The qe values obtained for MG adsorption with O-doped CSAC showed an adsorption efficiency of about 90 %. An adsorption capacity of 284.6 mg g(-1) was obtained at 298 K with the Langmuir isotherm. The adsorption mechanism of MG with O-doped CSAC was also investigated.
Facile Preparation of Sulfonated Carbon Particles With Pomegranate Peels as Adsorbent for Enhanced Methylene Blue Adsorption From Aqueous Solutions
(Springer Heidelberg, 2024) Genel, Yasar; Genel, Ilyas; Saka, Cafer
In this study, in the first stage, activated carbon (AC) is produced from pomegranate peels, which are commonly found in Turkey, by pyrolysis after impregnation with NaOH (PPAC). In the second stage, the surface properties of the obtained PPAC sample are further improved by the sulfonation modification process with sulphuric acid (PPAC-S) for selective MB adsorption. For the characterization of the obtained samples, XRD, FTIR, SEM, nitrogen adsorption/desorption and EDS analyses were performed. Additionally, the zero charge points (pHzpc) of these samples were also determined. The isotherm, kinetic, and thermodynamic properties of the MB adsorption process with PPAC-S were examined. The qe values obtained for MB adsorption with PPAC and PPAC-S samples were found to be 98.79 mg/g and 199.18 mg/g, respectively. There is an increase of 100% in MB adsorption with the sulfonated PPAC adsorbent. Maximum adsorption capacity values of MB with the Langmuir model at temperatures of 298, 308, and 318 degrees C were 212.7, 216.9, and 245.1 mg/g, respectively. Additionally, the mechanism of MB adsorption onto PPAC-S was also attempted to be elucidated.
Facile Synthesis of Mesoporous Activated Carbons Based on Ash Tree for Methylene Blue Adsorption: Mechanism, Kinetics, Isotherm, and Thermodynamic Studies
(Taylor & Francis inc, 2023) Genel, Yasar; Genel, Ilyas; Saka, Cafer
Activated carbons(AC) were synthesized as a result of chemical activation with ZnCl2, NaOH, H3PO4, and H3BO3 from the ash tree(AH), which is abundant in Turkey and the world. It was investigated that the obtained ACs could be used as effective adsorbents for the removal of methylene blue(MB) from the aqueous solution. SEM, EDX, BET, FTIR, and CHNS elemental analyses were used for the characterization of raw and ACs. The results show that carbonaceous materials contain both mesoporous and active functional groups. The maximum adsorption capacities obtained as a result of chemical activation of ZnCl2 (AH-ZnCl2) and NaOH (AH-NaOH) with the best surface area values were determined as 334 mg g(-1) and 364 mg g(-1), respectively. The adsorption mechanism was evaluated with pseudo-first-order and pseudo-second-order kinetic models. It can be concluded that ACs prepared from ash wood are quite ideal when compared with different adsorbents in the literature for removing methylene blue from aqueous solutions.
Green Synthesis of Hierarchical Nitrogen-Doped Porous Activated Carbon Material Based on Biomass Waste for High-Performance Energy Storage as Supercapacitor
(Pergamon-elsevier Science Ltd, 2025) Genel, Lyas; Yardim, Yavuz; Saka, Cafer
Superior electrochemical capacitance properties can be achieved with biomass-based carbon materials synthesized with appropriate activation methods. In this study, chestnut shells were employed as a biomass-derived carbon precursor for the development of high-performance electrode materials for electrochemical energy storage applications. The chestnut shells were first pyrolyzed through chemical activation with sodium hydroxide to produce N-doped NaOH-CS. Then, the surface properties were further improved by nitrogen (N) atom doping to the AC sample using ammonia. Due to the favorable pore structure, specific surface area, and N content, the N-doped NaOH-CS supercapacitor material exhibits excellent capacitive performance of 625 F/g at 1 A/g, representing a 500 % increase compared to the NaOH-CS material. Different analytical methods are used for the characterisation of the materials. Experimental results confirm that the N-doped NaOH-CS supercapacitor material shows a stability of 84.6 % over 5000 consecutive cycles. At a current density of 1 A/g, the NaOH-CSGCE//AC material delivers an energy density of 21.2 Wh/kg with a power density of 558 W/kg. When the current density increases to 8 A/g, it maintains a comparable energy density of 22.0 Wh/kg while achieving a significantly higher power density of 4400 W/kg. These findings demonstrate the suitability of biomass waste obtained from chestnut shells for high-performance electrode materials.
Hydrogen Production and Electrochemical Energy Storage With a Dual-Function Application of Boron and Oxygen-Doped Biomass-Based Porous Activated Carbon-Based Composite Material
(Pergamon-elsevier Science Ltd, 2025) Yardim, Yavuz; Genel, Ilyas; Saka, Cafer
In this study, boron (B) and oxygen (O) atoms were doped into activated carbon (AC) derived from pomegranate peel biowaste through potassium hydroxide (KOH) activation using boric acid. This material (B, O doped ACPP) is used both as a metal-free catalyst in the production of hydrogen (H-2-P) with sodium borohydride (NaBH4) in methanol (CH3OH) and as an electrode for a supercapacitor in the energy storage field. The results provide significant increases in both application areas with the same material. The TEM analysis revealed the formation of uniformly distributed nanoscale particles (similar to 8.25 nm), which further increases the accessible surface area and shortens ion diffusion paths. The completion time of H-2 release by NaBH4 reaction in only CH3OH is 16 min. However, the H-2-P reaction of NaBH4 in CH3OH with B, O doped ACPP is completed in 7 min. H-2 production rate (HGR) value obtained using B, O doped ACPP with 0.25 g NaBH4 is 18471 mLmin(-1)g(cat)(-1). A substantial enhancement of approximately 2.5 times in specific capacitance is observed for B, O-doped ACPP compared to ACPP. At a current density of 1.6 A g(-1), the B, O-doped ACPP-GCE electrode demonstrates excellent cycling stability, 87.8 % of its capacitance after 10.000 cycles. The charge transfer resistance (Rct) values were measured to be 41.1 Omega for ACPP and 17.7 Omega for B, O doped ACPP.
Improvement of Electrochemical Double-Layer Capacitance by Fast and Clean Oxygen Plasma Treatment on Activated Carbon as the Electrode Material From Walnut Shells
(Pergamon-elsevier Science Ltd, 2020) Saka, Cafer; Baytar, Orhan; Yardim, Yavuz; Sahin, Omer
In this study, a simple, fast, and clean oxygen plasma method is presented to increase the surface area of activated carbon from walnut shells (WAC) and to connect functional groups containing oxygen to the carbon sample surface. X-ray photoelectron spectroscopy (XPS), nitrogen adsorption technique, Fourier-transform infrared spectroscopy (FTIR), X-Ray Diffraction (XRD), and scanning electron microscope (SEM) analyses to investigate the properties of the WAC and WACP are performed. Cyclic voltammetry(CV) and electrochemical impedance spectroscopy(EIS) measurements are used to investigate the capacitance properties of the supercapacitors. A significant increase in the surface area of the WAC was increased from 22 m(2) g(-1) to 78 m2 g(-1) after oxygen plasma treatment. The specific capacitance was improved from 6.98 F g(-1) to 76.89 F g(-1) at 2.5 mV s(-1). The devices with functionalized electrodes exhibited cyclic stability of 78% after 5000 cycles.
Investigation of Redox Properties of Naratriptan, an Indole Derivative Compound Used in Migraine Treatment, and Its Voltammetric Analysis
(2008) Saka, Cafer; Şentürk, Zühre
Bu araştırmada migren tedavisinde kullanılan Naratriptan'ın camsı karbon elektrot üzerinde redoks özellikleri çalışılmıştır. Elektrot yanıtının destek elektrolitine, pH'ye, gerilim tarama hızına ve derişime bağımlılığını incelemek için dönüşümlü voltametri ve diferansiyel puls voltametrisi kullanılmıştır. Bileşiğin yükseltgenmesinin, çalışılan pH=2-12 aralığında tersinmez ve adsorpsiyon karakteristiklerine sahip difüzyon-kontrollü olduğu gösterilmiştir. Diferansiyel puls voltametrisi kullanılarak fosfat (pH=7) ve Britton Robinson (pH=8) tamponu içerisinde elde edilen sonuçlar, Naratriptan'ın miktar tayini için gözlenebilme sınırı sırasıyla 4.95x10-6 M ve 1.80x10-5 M olan yeni bir yöntem geliştirmeye olanak sağlamıştır.Anahtar kelimeler: Naratriptan, Camsı karbon elektrot, Dönüşümlü voltametri, Diferansiyel puls voltametrisi, Miktar tayini
Iodine Adsorption and Electrochemical Double-Layer Capacitor Characteristics of Activated Carbon Prepared From Low-Cost Biomass
(Taylor & Francis inc, 2023) Saka, Cafer; Yardim, Yavuz; Sahin, Omer; Baytar, Orhan
The efficient adsorption application and electric double-layer capacitor material with low-cost biomass-based activated carbon materials have been quite common recently. In this study, chestnut shell-based activated carbons were produced by chemical activation. ZnCl2, H3PO4, and KOH agents were used for chemical activation. The obtained activated carbon, iodine adsorption from aqueous solutions, and its use as an electro capacitor were investigated. The scanning electron microscope, nitrogen adsorption/desorption, and Fourier transform infrared spectroscopy were used for characterization. The values of surface area and iodine adsorption capacity of the chestnut shell-based activated carbon are 1544 m(2) g(-1) and 1525 mg g(-1). As a result, a specific capacitance of 97 Fg(-1) with chestnut shell-based activated carbon was obtained in a 1 M KCl electrolyte for the electrochemical double-layer capacitor. This study shows that activated carbon based on the chestnut shell can be used both as an electrochemical energy storage material and as an adsorbent in iodine adsorption.
The Natural Diatomite From Caldiran-Van (Turkey): Electroanalytical Application To Antimigraine Compound Naratriptan at Modified Carbon Paste Electrode
(Bentham Science Publ Ltd, 2010) Caliskan, Necla; Sogut, Eda; Saka, Cafer; Yardim, Yavuz; Senturk, Zuhre
This paper is the first report describing the characterization of local diatomite of Caldiran-Van region (Eastern Anatolia, Turkey). Special attention was paid to the ability of its electroanalytical performance at modified electrodes and to the potential application of diatomite-modified electrode. For this purpose, the determination of Naratriptan which is a novel oral triptan (5-hydroxytryptamine receptor agonist) in migraine treatment, by means of a carbon paste electrode modified with 10% (w/w) of diatomite was studied using cyclic and square-wave voltammetry. The experimental conditions that affect the electrode reaction process were studied in terms of pH of the supporting electrolyte, scan rate, accumulation variables, modifier composition and square-wave parameters. Using square-wave stripping mode, the drug yielded a well-defined voltammetric response in Britton-Robinson buffer, pH 4.0 at 0.84 V (vs Ag/AgCl) (a pre-concentration step being carried out with an open circuit at 120 s). The process could be used to determine Naratriptan concentrations in the range 5x10(-7)-9x10(-7) M, with a detection limit of 1.25x10(-7) M (46.5 mu g L(-1)). The applicability of the method to spiked human urine samples was illustrated.
Oxygen and Nitrogen-Doped Carbon Particles Derived From Pyrolysis of Chlorella Vulgaris and Spirulina Platensis Microalgae as an Efficient Electrode Material for Supercapacitor Application
(Taylor & Francis inc, 2023) Yardim, Yavuz; Saka, Cafer
This study consists of the thermal activation of Chlorella vulgaris and Spirulina platensis microalgae with a potassium hydroxide (KOH) chemical agent in a carbon dioxide (CO2) atmosphere and the formation of nitrogen and oxygen-doped material from the hydrothermal interaction of the obtained activated carbons with nitric acid. The obtained nitrogen and oxygen-doped activated carbons were used in the production of electrochemical super capacitors. The morphological properties of the obtained pores were evaluated by transmission electron microscopy (TEM). Electrochemical properties were evaluated according to the cyclic voltammetry (CV) method in sulphuric acid (H2SO4), potassium chloride (KCl), and sodium hydroxide (NaOH) electrolytes with a scanning rate in the range of 2.5-50 mVs(-1). Nitrogen and oxygen doped electrode electrochemical capacitor based on Spirulina platensis microalgae showed the highest specific capacitance of 99.53 Fg(-1) at a scanning rate of 2.5 mV s(-1) in 1 M H2SO4 electrolyte. In contrast, the supercapacitor based on an activated carbon electrode from Chlorella vulgaris microalgae showed the highest specific capacitance of 156.04 Fg(-1) at a scan rate of 2.5 mV s(-1) in 1 M KCl electrolyte.
Preparation and Characterization of Activated Carbon From Pine Cone by Microwave-Induced Zncl2 Activation and Its Effects on the Adsorption of Methylene Blue
(Springer, 2014) Ozhan, Abdurrahman; Sahin, Omer; Kucuk, Mehmet Masuk; Saka, Cafer
In this work, activated carbon prepared from pine cone (PCAC) with ZnCl2 as an activation agent under microwave radiation was investigated. The activation step was performed at the microwave input power of 400 W and radiation time of 5 min. The properties of activated carbon were characterized by N2 adsorption Brunauer-Emmett-Teller (BET), scanning electron microscopy and Fourier transform infrared spectroscopy. Results showed that the BET surface area, Langmuir surface area, and total pore volume of PCAC were 939, 1,486 m(2)/g and 0.172 cm(3) / g, respectively. Adsorption capacity was demonstrated by the iodine numbers. The adsorptive property of PCAC was tested using methylene blue dye. Equilibrium data was best fitted by the Langmuir isotherm model, showing a monolayer adsorption capacity of 60.97 mg/ g. The pseudo-first-and pseudosecond- order kinetic models were examined to evaluate the kinetic data, and the rate constants were calculated. Adsorption of the dyes followed pseudo-first order kinetics. Thermodynamic parameters such as free energy, enthalpy and entropy of dye adsorption were obtained.
Review of Analytical Methods for Identification and Determination of Triptans
(Taylor & Francis inc, 2009) Saka, Cafer
A review of analytical methods for identification and determination of triptans which are a group of tryptamine based drugs used in the acute treatment of migraine headaches is presented. In this review article, various methods used for determination of triptans have been covered. The methods have been divided into four groups accordingly to the applied analytical techniques: chromatographic, electrochemical, spectrometric, and capillary electrophoretic.
Utilisation of Green Nitrogen-Doped Biomass-Based Hierarchical Porous Activated Carbon Particles for Enhancement of Electrochemical Energy Storage Performance
(Elsevier Science Sa, 2025) Genel, Ilyas; Yardim, Yavuz; Saka, Cafer
Activated carbon particles were obtained from rosehip wood-based carbon precursor by chemical activation with potassium hydroxide (RHAC). After this pyrolysis process, nitrogen-doped hierarchical porous carbon was prepared by ammonia activation (N-doped RHAC). The prepared carbonaceous materials were designed as an electrode for a supercapacitor. Standard electrochemical analyses were performed. The specific capacitance (Cs) of RHAC/GCE was determined to be 25 F/g at 2.5 mV/s and 23 F/g at 0.2 A/g. In contrast, the N-doped RHAC/ GCE demonstrated significantly higher Cs values of 119 F/g at 2.5 mV/s and 121 F/g at 0.2 A/g. According to CV and GCD measurements, the N-doped RHAC material exhibited approximately a fivefold increase in specific capacitance compared to the RHAC-based electrode. A specific capacitance retention rate of 94.6 % was obtained after 1000 cycles at a current density of 1.6 A/g. The surface properties and characteristics of the obtained materials were carried out by SEM, nitrogen adsorption, Raman, FTIR, EDS and XPS analyses. EDS and XPS analyses showed that N atom doping was successful. This study suggests that rosehip tree biomass-based N atom doped carbon material is suitable for supercapacitors as an electrode.