Journal of Inorganic Materials, Volume. 37, Issue 10, 1051(2022)

Fabrication of Hollow Fiber Supported TiO2 Ultrafiltration Membranes via Ultrasound-assisted Sol-Gel Method

Qingyang LÜ... Yuting ZHANG and Xuehong GU* |Show fewer author(s)
Author Affiliations
  • State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
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    TiO2 membranes have been applied in ultrafiltration (UF) separation due to their strong hydrophilicity and good thermochemical stability, but most of them are tubular membranes with low permeation flux and time-consuming preparation. To improve the flux and save the preparation time of TiO2 membrane, hollow fiber supported TiO2 UF membranes were prepared via ultrasound-assisted Sol-Gel method by using tetrabutyl titanate as precursor. Effects of acid/titanium molar ratio, ultrasound time and calcination temperature on TiO2 sols and UF performance of membranes were investigated extensively. The results showed that when the acid/titanium ratio was 0.25, the obtained TiO2 sol showed an average particle size of 3252 nm, which would be reduced to 1817 nm after ultrasonic treatment for 30 s. Coating with the above TiO2 sol, defect-free TiO2 UF membrane with average thickness of 1 μm can be prepared on hollow fiber support by calcining at 350 ℃ twice. The pure water flux of the obtained membrane was 145 L·m-2·h-1·bar-1, and the dextran molecular weight at 90% rejection of membrane was 2586 Da with corresponding average pore size of 2.5 nm.

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    Qingyang LÜ, Yuting ZHANG, Xuehong GU. Fabrication of Hollow Fiber Supported TiO2 Ultrafiltration Membranes via Ultrasound-assisted Sol-Gel Method [J]. Journal of Inorganic Materials, 2022, 37(10): 1051

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    Paper Information

    Category: RESEARCH ARTICLE

    Received: Apr. 3, 2022

    Accepted: --

    Published Online: Jan. 12, 2023

    The Author Email: GU Xuehong (xhgu@njtech.edu.cn)

    DOI:10.15541/jim20220185

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