Жарияланымдар / Публикации

Постоянный URI для этого сообществаhttps://cris.qyzpu.kz/handle/123456789/2

Просмотр

Настройки

Автор: search.filters.author.Zulkhair Aimukhametovich MansurovТема: search.filters.subject.KOH activation

Результаты поиска

Показано: 1 - 3 из 3
  • Загрузка...
    Изображение-миниатюра
    Некоторые метрики заблокированы вашими 
    настройками согласия
    Тип записи:Публикация,
    Electrochemical Performance of Biomass-Derived AC and CNTs-Based Supercapacitors
    (IGI Global, 2024-11-22)
    Meiram K. Atamanov
    ;
    Tolganay Atamanova
    ;
    Azamat Taurbekov
    ;
    Zulkhair Aimukhametovich Mansurov
    This study investigates the electrochemical performance of activated carbon (AC) derived from two biomass sources, rice husk (RH) and walnut shell (WS), utilizing two activation methods: chemical activation with potassium hydroxide (KOH) and physical activation with carbon dioxide (CO2). The aim is to evaluate the potential of these bio-derived carbon materials in energy storage applications, particularly for supercapacitors. The electrochemical behavior of the activated carbon electrodes was assessed using cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) techniques, along with electrochemical impedance spectroscopy (EIS), to evaluate the specific capacitance, energy density, charge transfer resistance, and ion diffusion properties.
  • Загрузка...
    Изображение-миниатюра
    Некоторые метрики заблокированы вашими 
    настройками согласия
    Тип записи:Публикация,
    Production and optimization of activated carbon from plant waste with high specific surface area for moisture-saving applications in agriculture
    (2024-10-20)
    Yerlan Doszhanov
    ;
    Aitugan Sabitov
    ;
    Karina Saurykova
    ;
    Zulkhair Aimukhametovich Mansurov
    ;
    М С Курманбаева
    In conditions of water shortage, sustainable agricultural development requires the use of water-saving technologies, including the use of water-retaining substrates based on activated carbon. In this work, the textural and adsorption characteristics of activated carbon obtained from plant waste were studied at different mass ratios of the sorbent and KOH (1:1, 1:2, 1:3 and 1:4). The aim of the study was to determine the optimal activation conditions for creating a material with a high specific surface area and a developed porous structure. The results showed that the largest pore volume (1.6 cm3/g) and a high degree of microporosity are achieved at a ratio of 1:3, which is confirmed by the analysis of pore distribution using the DFT and BJH methods. FTIR spectroscopy revealed the presence of functional groups (O–H, C=O and C–O) that contribute to water conservation. The differential pore volume distribution (dv(r), cm3/Å/g) also demonstrated that at a ratio of sorbent and KOH (1:3), the sample structure optimally combines micropores and mesopores, which increases the adsorption capacity of carbon.
    Цитирования (OpenAlex) 1
  • Загрузка...
    Изображение-миниатюра
    Некоторые метрики заблокированы вашими 
    настройками согласия
    Тип записи:Публикация,
    Адсорбция препарата «Вольтарен» на пористых углеродных материалах в статических и динамических условиях
    (2026-04-06)
    Jakpar Jandosov
    ;
    Alzhan Baimenov
    ;
    А.Н. Сабитов
    ;
    Е.О. Досжанов
    ;
    D. Chenchik
    The article investigates the adsorption of diclofenac (pure API and as part of the Voltaren preparation) on porous carbon materials obtained from rice husks by chemical activation methods (H3PO4, K2CO3, KOH), as well as on synthetic carbon from xerogel. A comparative assessment of the sorption capacity and the kinetics of the process was carried out under static and dynamic conditions. It was found that the KOH-activated sample (SBET = 2610 m2/g) has the highest microporosity and demonstrates the maximum adsorption capacity (up to 956 mg/g in static and up to 1016 mg/g in a column with a fixed layer). Kinetic data is well described by a pseudo second-order model (R2 > 0.99), and dynamic adsorption is described by the Thomas model (R2 = 0.998). This allows us to predict the efficiency of sorbents in flow systems. There was no significant effect of the auxiliary components of the dosage form on the sorption process. The established patterns indicate the predominant interaction of the diclofenac molecule with the microporous carbon matrix through π–π interactions and electrostatic effects. The results obtained confirm the prospects of alkaline-activated carbon materials based on biomass for the development of effective enterosorbents for intoxication with nonsteroidal anti-inflammatory drugs.