Қазақ ұлттық қыздар педагогикалық университеті / Казахский национальный женский педагогический университет

Постоянный URI для этого сообществаhttps://cris.qyzpu.kz/handle/123456789/1

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Автор: search.filters.author.Жандос Турегулович Тауанов

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    DEVELOPMENT OF TECHNOLOGY FOR OBTAINING A BIODEGRADABLE POLYMER
    (2023-10-07)
    K. Sh. Shynzhyrbai
    ;
    Сейтхан Азат
    ;
    Mukhametkali Musagalievich Mataev
    ;
    Ulan Zhantikeyev
    ;
    Kainaubek Toshtay
    An important technological solution for plastic pollution is the replacement of traditional biodegradable polymers, biodegradable polymer materials with physico-mechanical properties that cause environmental pollution. An urgent problem is the search for ways to reduce the self-decomposition of biopolymers and waste, as well as to reduce the cost of such materials, including the use for these purposes of substances that can be analogues of biodegradable polymers. The research work is aimed at obtaining a biodegradable biopolymer based on starch raw materials in the presence of various organic acids (citric acid, acetic acid, lactic acid) and plasticizers (glycerin, polyvinyl alcohol, nanomaterial). An effective material was selected from the products obtained from various acids and plasticizers. Measures to improve the technology of bioplastics production are considered. A durable and economical biopolymer capable of processing and biodegrading biological waste, including starch-containing garbage, has been obtained. The resulting products have successfully passed all physico-chemical tests and are ready for mass production. A scanning electron microscope and thermogravimetric analysis with IR spectroscopy were used to study the physicochemical parameters of the obtained biopolymers.
    Цитирования (OpenAlex) 1Цитирования (OpenCitations) 1
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    ОЧИСТКА ВОДЫ ОТ ФАРМАЦЕВТИЧЕСКИХ ЗАГРЯЗНИТЕЛЯ ЦЕФТРИАКСОНА С ИСПОЛЬЗОВАНИЕМ МОДИФИЦИРОВАННОГО ПРИРОДНОГО ЦЕОЛИТА
    (Al-Farabi Kazakh National University, 2025-06-24)
    Аружан Сламгожа
    ;
    Shynggyskhan Sultakhan
    ;
    G.U. Baitasheva
    ;
    Kainaubek Toshtay
    ;
    N.A. Akhmetov
    В статье рассмотрена очистка воды от фармацевтических препаратов (цефтриаксона) путем сорбции модифицированным природным цеолитом. Модификация цеолита была проведена поверхностно активным веществом (цетилтриметиламмоний бромид или ЦТАБ) с разными концентрациями. В исследовании применения природного цеолита для очистки сточных вод от фармацевтических веществ было установлено, что степень адсорбции достигает 97,3% для цефтриаксона, при начальной концентрации 50 мг/л. Изотермы адсорбции соответствовали модели Ленгмюра, что подтверждает высокую эффективность цеолита в очистке воды от фармацевтических загрязнителей и его потенциал для промышленного применения. Результаты исследования подтверждают перспективность применения природных цеолитов в системах очистки воды. Ключевые слова: природный цеолит, модифицированный цеолит, фармацевтическое вещество, изотерма адсорбции, кинетика адсорбции, очистка воды
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    Synthesis of Biomass-Derived Graphene Nanomaterials by Chemical Activation with KOH
    (Multidisciplinary Digital Publishing Institute, 2025-11-21)
    Makpal Seitzhanova
    ;
    Zhanar B. Kudyarova
    ;
    Bibigul B. Rakhimova
    ;
    Lyaila Tugelbayeva
    ;
    Жандос Турегулович Тауанов
    This work introduces an environmentally sustainable and cost-effective strategy for synthesizing graphene nanomaterials from agricultural residues—walnut shells and apricot stones. The synthesis pathway combines desilication, controlled pre-carbonization, chemical activation with KOH, and mild exfoliation to produce few-layer graphene with a high degree of structural order. The process, conducted at 523–573 K for pre-carbonization and 1123 K for activation, enables the formation of graphene sheets with a specific surface area of approximately 1300 m2/g, carbon content of 80–90%, and average pore diameter below 100 nm. The materials were comprehensively characterized using SEM, TEM, Raman spectroscopy, and BET analysis. Raman spectra revealed an IG/I2D ratio of ~1.5–2 a.u., confirming the presence of 4–5 graphene layers. Compared to conventional biomass-derived graphene routes, the developed approach ensures enhanced porosity, higher graphitic ordering, and improved purity, demonstrating its strong potential for energy storage, adsorptive purification, and environmentally benign nanotechnology applications.
    Цитирования (OpenAlex) 8Цитирования (OpenCitations) 1
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    Получение и кинетический анализ термического разложения координационного комплекса на основе меди
    (2025-12-03)
    А. Акинжанова
    ;
    Т.С. Атаманова
    ;
    Жандос Турегулович Тауанов
    ;
    Т.Д. Махсутов
    ;
    Е. Мусатай
    This paper presents the results of the synthesis and study of the thermal decomposition of the tetraamminecopper(II) nitrate coordination complex (TACN). The morphological structure of the obtained crystals was examined using scanning electron microscopy (SEM). The crystallite sizes were analyzed with a diffractometer. The average crystallite size, calculated by the Debye-Scherrer formula for the most intense diffraction peak, was found to be 37 nm. According to thermogravimetric analysis (DTG), mass loss begins at approximately 170 °C, with the main decomposition occurring at 237 °C. Gas evolution is observed within the temperature range of 170-275 °C.
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    Comparative Study of the Structural and Adsorptive Performance of Biomass-Derived Graphene Materials
    (Multidisciplinary Digital Publishing Institute, 2026-02-08)
    Makpal Seitzhanova
    ;
    Zhanar Kudyarova
    ;
    Yerlan Doszhanov
    ;
    Bibigul B. Rakhimova
    ;
    Svetlana Aleshkova
    This study presents the development of an environmentally benign and economically viable methodology for the synthesis of graphene-containing carbon materials derived from renewable agricultural residues, specifically walnut shells, rice husks, and apricot stones. The proposed synthesis route involves sequential stages of controlled pre-carbonization, desilicification, chemical activation with potassium hydroxide (KOH), and subsequent mild exfoliation, resulting in the formation of few-layer graphene with a high degree of structural ordering. Pre-carbonization carried out at 523–573 K, followed by activation at 1123 K, yields graphene sheets exhibiting a specific surface area of 1300–1800 m2/g, a carbon content of 60–90%, and an average pore diameter below 100 nm. The synthesized materials were subjected to comprehensive physicochemical characterization using BET surface area analysis, Raman spectroscopy, FTIR spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and atomic absorption flame emission spectrophotometry. Raman spectroscopic analysis revealed an I_G/I_2D intensity ratio of approximately 1.5–2.0, indicating the presence of graphene structures consisting of approximately four to five layers. To enhance adsorption performance, the graphene-containing carbon materials were further functionalized with sulfuric acid, and the successful incorporation of surface functional groups was confirmed by FTIR spectroscopy. The adsorption properties of the functionalized graphene-containing carbon materials were evaluated in aqueous solutions containing sodium, potassium, calcium, and magnesium salts, demonstrating adsorption efficiencies of up to 80%. Compared to conventional biomass-derived graphene synthesis methods, the developed approach produces materials with enhanced porosity, higher graphitic ordering, and improved chemical purity. These characteristics highlight the strong potential of the synthesized graphene-containing carbon materials for applications in energy storage systems, adsorption-based water purification technologies, and environmentally sustainable nanotechnological applications.
    Цитирования (OpenAlex) 4