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Abstract <p>This paper described the synthesis of the ZnO membrane layer on in-house developed oxide-bonded microporous silicon carbide support and its characteristics. The SiC ceramic supports were fabricated at 1100&#xa0;°C in the air for 1&#xa0;h using zeolite and alumina as sintering additives. The ZnO membrane layer was grown on SiC ceramic support by a simple sol–gel method. Composite mesoporous membrane obtained with porosity ~ 35 vol.% and mean pore diameter of ~ 185&#xa0;nm and membrane layer thickness of ~ 8&#xa0;μm. The membrane effectively removed various dyes and bacteria from contaminated water and exhibited improved permeability due to the combined effect of ceramic support and ZnO filtration layer. The equilibrium adsorption isotherms were evaluated using Langmuir and Freundlich equations and best fitting was obtained with Langmuir model. The results of this study are useful to enrich the knowledge of selective membranes on SiC support and the performance results indicated that it has a strong potential for applications in the removal of dyes and bacteria from wastewater.</p> Graphical Abstract <p></p>

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Preparation of ZnO Nanostructures in SiC Ceramic Membrane for Removal of Dyes from Water and its Antibacterial Activity

  • 期刊论文

  • 发表日期：

    2025年7月17日

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  • Nilanjan Santra,
  • Mousumi Tudu,
  • Sohini Chatterjee,
  • Amalesh Samanta,
  • Nijhuma Kayal

摘要

Abstract

This paper described the synthesis of the ZnO membrane layer on in-house developed oxide-bonded microporous silicon carbide support and its characteristics. The SiC ceramic supports were fabricated at 1100 °C in the air for 1 h using zeolite and alumina as sintering additives. The ZnO membrane layer was grown on SiC ceramic support by a simple sol–gel method. Composite mesoporous membrane obtained with porosity ~ 35 vol.% and mean pore diameter of ~ 185 nm and membrane layer thickness of ~ 8 μm. The membrane effectively removed various dyes and bacteria from contaminated water and exhibited improved permeability due to the combined effect of ceramic support and ZnO filtration layer. The equilibrium adsorption isotherms were evaluated using Langmuir and Freundlich equations and best fitting was obtained with Langmuir model. The results of this study are useful to enrich the knowledge of selective membranes on SiC support and the performance results indicated that it has a strong potential for applications in the removal of dyes and bacteria from wastewater.

Graphical Abstract