Development of TiO2 ultrafiltration membranes using nanoparticle slurry-based dip coating

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-05-08 DOI:10.1016/j.jeurceramsoc.2025.117523

Jongman Lee , Jang-Hoon Ha , Hong Joo Lee , In-Hyuck Song , Syed Zaighum Abbas Bukhari

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Abstract

TiO₂ ultrafiltration (UF) membranes are promising for environmental applications such as wastewater filtration and photocatalysis. Herein, dip coating of Al₂O₃ microfiltration (MF) membranes with a TiO₂ nanoparticle (NP) slurry is proposed as an alternative to the conventional, laborious sol–gel method to prepare these membranes. The dispersion of the NPs in the slurry was optimized using chemical and mechanical treatments. The effect of the sintering temperature on the pore size distribution was evaluated. The slurry was stabilized by 2.3 wt% Darvan CN at pH 8.5. Small milling ball sizes improved the dispersion and reduced the agglomerate size. The optimized slurry was used to produce a 3.3 µm-thick TiO₂ UF layer. Sintering at 700 ℃ yielded pore sizes up to 50 nm and 26 nm (Hg porosity and molecular weight cut-off measurements, respectively). These findings demonstrate how dip coating using a TiO₂ NP slurry facilitates the development of TiO₂ UF membranes.

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纳米颗粒浆料基浸涂TiO2超滤膜的研制

TiO2超滤膜在废水过滤和光催化等环境领域具有广阔的应用前景。本文提出用TiO2纳米颗粒（NP）浆料浸涂Al2O3微滤（MF）膜，以替代传统的、费力的溶胶-凝胶方法来制备这些膜。通过化学和机械处理，优化了NPs在料浆中的分散。考察了烧结温度对孔径分布的影响。用2.3 wt% Darvan CN在pH 8.5下稳定浆料。较小的磨球粒度改善了分散性，降低了团聚体粒度。将优化后的浆料用于制备3.3µm厚的TiO2 UF层。在700℃下烧结得到的孔隙尺寸分别为50 nm和26 nm （Hg孔隙率和分子量截止测量值）。这些发现证明了使用TiO2 NP浆料的浸涂如何促进TiO2 UF膜的发展。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.