Co₃O₄ nanoparticles synthesized by solution combustion synthesis present a versatile platform for the development of porous nanostructures with tunable morphology and physicochemical properties. Synthesis conditions and parameters such as fuel type; fuel-to-oxidizer ratio and temperature control lead yielding; and Co₃O₄ NPs with fine particle size, surface area, and porosity result in enhancing their electrochemical and catalytic capabilities. This review evaluates present studies about SCS Co₃O₄ NPs to study how synthesis parameter modifications affect both surface morphology and material structure characteristics including porosity features, which make their improved performance ideal for lithium-ion batteries and supercapacitors. Moreover, the integration of dopants with carbon-based hybrid composites enhances material conductivity and stability by addressing both capacity fading and low electronic conductivity concerns. This review mainly aims to explore the significant relation between fundamental material design principles together with practical uses and provides predictions about future research advancements that aim to enhance the performance of Co₃O₄ NPs in next-generation energy and environmental technology applications.

The article provides an overview of modern methods of processing mining and metallurgical waste to obtain functional materials such as silicon, rare earth metals, nanoporous silica and other valuable components. The technologies of processing and purification, including hydrometallurgical and pyrometallurgical processes, as well as their applicability to various types of waste generated in the mining and metallurgical complex are considered. Special attention is paid to the environmental aspects and economic efficiency of waste recycling, as well as the possibilities of implementing waste-free processes that reduce environmental pollution. Examples of successful implementation of innovative technologies are given and prospects for the use of recycled materials in various industries are described. The authors emphasize the importance of implementing waste-free processes to reduce environmental pollution. The article also discusses methods for the extraction and processing of silicon and silica, which can significantly improve the properties of the final products. Innovative technologies for processing waste from mining and metallurgical production contribute not only to reducing the volume of waste but also to the creation of new economically profitable materials. The study aims to draw attention to the importance of waste recycling and demonstrates the potential of their use as valuable raw materials, which contributes to sustainable development and efficient use of natural resources. The authors also discuss the prospects for further development of recycling technologies, including the development of new methods and optimization of existing processes, which will increase efficiency and reduce waste recycling costs.

Горно-металлургическая промышленность является значительным источником разнообразных отходов, которые требуют утилизации или повторного использования. В последние годы возрос интерес к разработке технологий и процессов, направленных на использование этих отходов для получения новых материалов, что имеет важное значение для снижения нагрузки на окружающую среду и оптимизации ресурса потребления. В данной работе рассматриваются основные методы и технологии получения материалов из горно-металлургических отходов, их преимущества и перспективы применения. В работе представлен обзор наиболее эффективных технологий по извлечению различных видов сырья и готовой продукции из горно-металлургической промышленности. Показаны разработанные технологии извлечения ценных компонентов из отходов производства на основании проведенных лабораторных исследований. В данной работе были получены наночастицы диоксида кремния, геополимерный материал, материал, содержащий фазовый электропроводящий состав Тау-кен металлургия өнеркәсібі кәдеге жаратуды немесе қайта пайдалануды қажет ететін әртүрлі қалдықтардың маңызды көзі болып табылады. Соңғы жылдары осы қалдықтарды жаңа материалдар алу үшін пайдалануға бағытталған технологиялар мен процестерді дамытуға қызығушылық артты, бұл қоршаған ортаға түсетін зиянды азайту және ресурстарды тұтынуды оңтайландыру үшін маңызды. Бұл жұмыста тау-кен және металлургиялық қалдықтарынан материалдарды алудың негізгі әдістері мен технологиялары, олардың артықшылықтары мен қолдану перспективалары қарастырылады. Жұмыста тау-кен металлургия өнеркәсібінен шикізат пен дайын өнімдердің әртүрлі түрлерін алудың ең тиімді технологиялары қарастырылған. Өндіріс қалдықтарынан бағалы компоненттерді алудың әзірленген технологиялары зертханалық зерттеулер негізінде көрсетілген. Жұмыста сирек кездесетін металл кенінің қалдықтарынан кремний диоксиді бар материал, геополимерлі материал, құрамында электрөткізгіштік фазасы бар материал алынды The mining and metallurgical industry is a significant source of a variety of waste that requires disposal or reuse. In recent years, there has been increased interest in the development of technologies and processes aimed at using these wastes to produce new materials, which is important for reducing the burden on the environment and optimizing resource consumption. This paper discusses the main methods and technologies for obtaining materials from mining and metallurgical waste, their advantages and prospects for application. The paper provides an overview of the most effective technologies for the extraction of various types of raw materials and finished products from the mining and metallurgical industry. The developed technologies for extracting valuable components from production waste are shown based on laboratory studies. In this work, the following materials were obtained: silicon dioxide nanoparticles, geopolymer material, material containing a phase conductive composition