Features of obtaining selective metal oxide layers for ceramic membranes via sol-gel method

Authors

DOI:

https://doi.org/10.15587/2706-5448.2025.345312

Keywords:

selective layers, metal oxides, spin-coating, ceramic membranes, sol-gel method, water permeability

Abstract

The object of research is metal oxide layers based on SiO₂, TiO₂, ZrO₂ for creating intermediate and selective layers on ceramic matrices. One of the most problematic areas is the difficulty of obtaining a uniform, dense, and stable selective layer determines the operational characteristics of the membrane – selectivity, productivity, and fouling resistance. The sol-gel method was used for synthesizing colloidal solutions of SiO₂, TiO₂, ZrO₂ and the spin-coating method for applying the resulting suspensions to ceramic matrices. The sizes of SiO₂, TiO₂, ZrO₂ particles were determined by turbidimetry, with diameters of 159 nm, 79 nm, and 99 nm, respectively. The results of IR spectroscopy show that the application of TiO₂ selective layer by spin-coating allows for complete coverage of the membrane surface, while the application of ZrO₂ layer results in incomplete coverage with confirmation of the formation of a hydrated precipitate. Studies of morphology by scanning electron microscopy indicate a coarse-grained matrix structure and a more homogeneous medium-grained structure after applying an intermediate SiO2 layer. The transport properties of ceramic matrices and membranes were determined by their permeability to pure water indicates high permeability of both matrices and membranes. Thus, the sol-gel method in combination with spin-coating has several features, in particular, controlled hydrolysis of precursors and the possibility of step-by-step formation of uniform layers makes it possible to obtain membranes with high water permeability (over 560 cm³/min) and a stable microfiltration structure after applying only 5 layers. Compared to similar methods, the proposed approach provides uniform coverage, less particle agglomeration, increased process reproducibility, enabling the creation of ceramic microfiltration membranes for water purification processes.

Supporting Agency

  • National Research Foundation of Ukraine for funding the project “Scientific Basis of Synthesis of Advanced Ceramic Membranes Using 3D Printing Technologies” (project registration number 2023.03/0178), Ministry of Education and Science of Ukraine for funding the applied research project “Chemically Modified Membranes for Rapid Detection of Nitrogen Compounds in Natural Waters as Markers of Explosives” (state registration number 0124U001095).

Author Biographies

Liudmyla Bohdan, National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute"

PhD Student

Department of Inorganic Substances, Water Treatment and General Chemical Technology

Khrystyna Hutsul, National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute"

PhD, Assistant

Department of Inorganic Substances, Water Treatment and General Chemical Technology

Olena Yanushevska, National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute"

PhD, Associate Professor

Department of Inorganic Substances, Water Treatment and General Chemical Technology

Yurii Fedenko, National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute"

PhD, Senior Lecturer

Department of Technology of Inorganic Substances, Water Treatment and General Chemical Technology

Tetiana Dontsova, National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute"

Doctor of Technical Sciences, Professor, Head of Department

Department of Technology of Inorganic Substances, Water Treatment and General Chemical Technology

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Features of obtaining selective metal oxide layers for ceramic membranes via sol-gel method

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Published

2025-12-29

How to Cite

Bohdan, L., Hutsul, K., Yanushevska, O., Fedenko, Y., & Dontsova, T. (2025). Features of obtaining selective metal oxide layers for ceramic membranes via sol-gel method. Technology Audit and Production Reserves, 6(3(86), 12–20. https://doi.org/10.15587/2706-5448.2025.345312

Issue

Vol. 6 No. 3(86) (2025): Chemical engineering

Section

Chemical and Technological Systems

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Copyright (c) 2025 Liudmyla Bohdan, Khrystyna Hutsul, Olena Yanushevska, Yurii Fedenko, Tetiana Dontsova

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