Recent progress in bio-based SiO₂–metal oxide composites for water treatment applications: A review
Li J. Yeszhan Y. Bexeitova K. Baimenov A. Kudaibergenov K. Adam M.R. Lee J. Azat S.
March 2026Elsevier B.V.
Results in Engineering
2026#29
Developing green, efficient, low-cost, and sustainable multifunctional water treatment materials has become an important research direction. Bio-based SiO₂ has attracted extensive attention due to its abundant sources, low cost, and high specific surface area. However, its limited functionality makes it difficult to achieve efficient removal, degradation, and antibacterial performance in water treatment. By incorporating metal oxides, the composites exhibit synergistic adsorption, photocatalytic, and antibacterial performance, with removal performance 1.5 to 5 times higher than that of pure SiO₂ and maintain good removal performance across various pollutant systems compared with traditional adsorbents, while enhancing their reusability. The review explores the research and application of bio-based SiO₂-metal oxide composites in water treatment. To this end, the influence of different methods for extracting bio-based SiO₂ from agricultural waste on the structure and properties of the materials is systematically surveyed. The preparation and characterization of bio-based SiO₂-metal oxide composites for structural optimization direction and performance regulation mechanisms are elaborated on heavy metal removal, organic pollutant degradation, and antibacterial purification. Emphasis is placed on structure–performance relationships, synergistic mechanisms, and engineering feasibility. Overall, this review presents a systematic research approach for the combination of metal oxides and bio-based SiO₂ to guide the direction toward sustainable water purification technologies. Copyright
Agricultural waste , Bio-based SiO₂ , Engineering feasibility , Water purification
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Satbayev University, Almaty, Kazakhstan
Shandong Huayu University of Technology, Dezhou, China
School of Chemical Sciences, Universiti Sains Malaysia, Penang, Malaysia
Department of Global Smart City & School of Civil, Architectural Engineering, and Landscape Architecture, Sungkyunkwan University, Suwon, 16419, South Korea
Satbayev University
Shandong Huayu University of Technology
School of Chemical Sciences
Department of Global Smart City & School of Civil
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Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026