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Acid Modification of Diatomite-Based Sorbents
(2020-09-30)
Araylim Nurgain
;
Meruyert Nazhipkyzy
;
Aizhan A. Zhaparova
;
Almagul Issanbekova
;
Michela Alfè
In this work, the effect of acid pre-treatment (hydrochloric acid, HCl) and calcination of diatomite, a silicon dioxide-material from natural sources, was studied with the aim to obtain diatomite-based sorbents with specific physicochemical properties. For this, acid pre-treatments with HCl at different calcination conditions, namely HCl concentration (0.5, 1 M) and calcination temperatures (from 600 to 900 °C) were studied. Morphological features different from those of natural diatomite were obtained. It has been found that treatment of diatomite with 0.5 M HCl at 800 °C showed a specific pore volume of 0.008 cm3/g, and a specific surface area of 19.26 m2/g, while the treatment of diatomite with 1.0 M HCl showed a specific pore volume of 0.011cm3/g, and a specific surface area of 25.57 m2/g. The performance of the acid pretreatment of diatomite for adsorption of Pb ions from water was also studied.
Цитирования (OpenAlex) 8Цитирования (OpenCitations) 6
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Preparation of Polymer-based Composite Films using Cellulose Derived from Agricultural Waste
(2025-01-01)
Yerkebulan A. Altynov
;
B. U. Rakhimova
;
Ulan Zhantikeyev
;
Kalampyr Bexeitova
;
Сейтхан Азат
This study explores the production of microcrystalline cellulose (MCC) through delignification of agricultural biomass and investigates its physicochemical properties.Rice husks and wheat straw served as primary biomass sources.The influence of the biomass-to-peroxyacetic acid ratio on MCC yield was systematically evaluated, with optimal yields of 70% from wheat straw and 85% from rice
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The Significant Role Of Mxene’s Derivatives And Composites In Supercapcitors: A Review
(2025-01-01)
Meruyert Nazhipkyzy
;
Aknur Berkinbayeva
;
Muhammad Hashami
;
Zhanar Kudyarova
;
Togzhan Mashan
MXene derivatives and composites are becoming fresh and promising two-dimensional (2D) materials because of their unique properties, performance, and multifunctionalities.This review covers the general aspects of MXenes (family of 2D transition metal carbides, nitrides, and carbonitrides), their MAX phase (a diverse class of nanolaminate materials with intriguing properties that have received incredible global research attention because they bridge the divide separating metals and ceramics.)precursors, dissimilarities and similarities between MAX phases and MXenes, and special properties of both materials.The important focuses are made on the methods of MXene synthesis and their stability and conductivity, as well as on synthesizing new MXene composites with desired characteristics.The impacts of MXenes in energy storage systems, especially supercapacitors, are discussed based on the high specific surface area, tunable porosity, and optimized inter-layer spacing.Here, various aspects of MXene materials, including properties, synthesis, and applications, have been discussed to highlight their importance for the development of energy storage systems and material science research.
Цитирования (OpenAlex) 4Цитирования (OpenCitations) 1
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Sustainable Energy Storage Systems: The Promise of Biomass-Derived Carbon Materials for High-Performance Supercapacitors
(Multidisciplinary Digital Publishing Institute, 2026-04-26)
Aigerim R. Seitkazinova
;
Muhammad Hashami
;
Meruyert Nazhipkyzy
;
Roza G. Abdulkarimova
;
Zhanar Kudyarova
The rapid demand for sustainable and efficient energy storage solutions has prompted the pursuit of eco-friendly electrode materials. Biomass-derived carbons from food waste offer a promising pathway to meet this need by combining waste valorization, environmental benefits, and high electrochemical performance. This review highlights that food waste biomass is an effective and inexpensive source of precursors for producing high-performance carbon materials for supercapacitors. Food waste, which includes fruit peels and vegetable residues, cereal husks, and oilseed residues, is a good source of lignocellulosic components, heteroatoms, and structural features that determine the electrochemical characteristics of the derived carbons. These wastes produce hierarchically porous carbons with high surface areas (>1500 m2 g−1) on pyrolysis and activation that provide superior ion transport, wettability and pseudocapacitive behaviour. Their electrochemical performance includes capacitances up to 520 F g−1 and energy densities of 35–70 Wh kg−1 in optimized systems, particularly under extended voltage windows or in hybrid supercapacitor configurations, and high cycling stability is equal to or even better than traditional carbons such as activated carbon and graphene. Additionally, biomass valorization contributes to a high level of greenhouse gas capture, decreases landfill, and correlates with the idea of a circular economy. The commercialization potential of biomass-based supercapacitors is supported by recent developments in AI-based optimization, combined with scalable synthesis methods, which would support ecologically, economically, and technologically sustainable energy storage on a large scale.
Цитирования (OpenAlex) 3

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