Preparation, characterization, and evaluation of TiO2-ZrO2 nanofiltration membranes fired at different temperatures

Anisah, Sofiatun; Puthai, Waravut; Kanezashi, Masakoto; Nagasawa, Hiroki; Tsuru, Toshinori

doi:10.1016/j.memsci.2018.07.072

Cited by 35 publications

(6 citation statements)

References 43 publications

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“…31 By character-ization of Ag-TiO 2 unsupported membrane by XRD, it can be concluded that the addition of silver nanosheets did not change the characteristic peaks of the TiO 2 membrane. 32 In addition, the characteristic peaks of Ag can be detected in Ag-TiO 2 samples by XRD, indicating the presence of Ag nanosheets.…”

Section: Methodsmentioning

confidence: 96%

Fabrication of Ag Nanosheet@TiO₂ Antibacterial Membranes for Inulin Purification

Zhu

Sun

et al. 2020

Ind. Eng. Chem. Res.

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Two-dimensional Ag nanosheets show increased antibacterial ability in many cases. Herein, Ag nanosheets with a thickness of 1.5 nm were introduced into titania sol to fabricate Ag nanosheet@TiO2 antibacterial membranes. The prepared membrane possessed a molecular weight cutoff of 22,163 Da and a high permeance of 236 L/(m2 h bar). Furthermore, the membrane presented good separation performance in the filtration of inulin extract. The transmittance of inulin reached 95%, and the decolorization rate reached 65%. Benefitting from the antibacterial properties of the Ag nanosheets, the membrane not only maintained a high stable flux and a low flux decay rate but also had good antifouling and antibacterial properties for inulin purification. Thus, it is promising for inulin purification applications.

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Section: Methodsmentioning

confidence: 96%

Fabrication of Ag Nanosheet@TiO₂ Antibacterial Membranes for Inulin Purification

Zhu

Sun

et al. 2020

Ind. Eng. Chem. Res.

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“…Preparation of TiO 2 -ZrO 2 Composite Sols, Gels and Powder Samples TiO 2 -ZrO 2 composite sols were prepared using Ti and Zr alkoxides. Two different types of sols can be used to prepare a sol-gel-derived TiO 2 -ZrO 2 composite membrane [35]. One is a polymeric sol and the other is a colloidal sol.…”

Section: Methodsmentioning

confidence: 99%

Gas Permeation Characteristics of TiO2-ZrO2-Aromatic Organic Chelating Ligand (aOCL) Composite Membranes

et al. 2020

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Methyl gallate (MG) and ethyl ferulate (EF) with a benzene ring were separately used as aromatic organic chelating ligands (aOCLs) to prepare two versions of TiO2-ZrO2-aOCL composite sols via hydrolysis and polycondensation reactions with titanium(IV) isopropoxide (Ti(OC3H7)4) and zirconium(IV) butoxide (Zr(OC4H9)4). Thermogravimetric and FT-IR analysis of dry gels revealed that aromatic rings were present in the residual organic matter when the gel was fired under nitrogen at 300 °C. In X-ray diffraction (XRD) measurements, the TiO2-ZrO2 composite material prepared using these two aOCLs showed an amorphous structure with no crystalline peaks for TiO2 and ZrO2. In N2 adsorption/desorption measurements at 77 K, the TiO2-ZrO2 samples using the aOCLs as a template appeared porous with a larger specific surface area than TiO2-ZrO2 without aOCL. TiO2-ZrO2-aOCL composite membranes were prepared by coating and firing TiO2-ZrO2-aOCL sol onto a SiO2 intermediate layer using an α-alumina porous tube as a substrate. Compared with the TiO2-ZrO2 membrane, the TiO2-ZrO2-aOCL membranes had higher gas permselectivity. The TiO2-ZrO2-EF membrane showed a He permeance of 2.69 × 10−6 mol m−2 s−1 Pa−1 with permeance ratios of He/N2 = 10.6 and He/CF4 = 163, while the TiO2-ZrO2-MG membrane revealed a bit less He permeance at 8.56 × 10−7 mol m−2 s−1 Pa−1 with greater permeance ratios of He/N2 = 61.7 and He/CF4 = 209 at 200 °C. A microporous TiO2-ZrO2 amorphous structure was obtained by introducing aOCL. The differences in the side chains of each aOCL could possibly account for the differences in the microporous structures of the resultant TiO2-ZrO2-aOCL membranes.

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“…Zirconium dioxide (ZrO2) is widely employed in many fields, including advanced ceramics, due to its high melting point, low thermal conductivity, excellent mechanical properties, chemical stability, and a range of other excellent physical and chemical properties [1][2][3][4]. At atmospheric pressure, there are volume changes when the three crystalline forms of zirconia (monoclinic, tetragonal, and cubic phases) are transformed into each other, especially when the tetragonal phase is transformed into the monoclinic phase.…”

Section: Introductionmentioning

confidence: 99%

Optimized preparation of MgO-ZrO₂ nanocomposite powders by assisted sol-gel method

Song

Liu

Huang

et al. 2022

J. Phys.: Conf. Ser.

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To address the problems of the non-uniform mixing of raw materials and abnormal grain growth that often exists in traditional methods for nano-zirconia matrix composites, an assisted sol-gel method was employed to prepare MgO-ZrO2 nanocomposite powders. The effects of the addition of MgO and calcination atmosphere on the phase content and microscopic morphology of the ZrO2 powders were investigated. The results showed that ZrO2 powders with 5 wt% MgO could be partially stabilized in the tetragonal phase by calcination in a vacuum, and had small particle size and narrow particle size distribution, with an average particle size of about 95 nm. Compared with the samples calcined in air, the particle size of the powder in a vacuum is smaller, so it is more conducive to the stability of the tetragonal phase of zirconia.

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Preparation, characterization, and evaluation of TiO2-ZrO2 nanofiltration membranes fired at different temperatures

Cited by 35 publications

References 43 publications

Fabrication of Ag Nanosheet@TiO₂ Antibacterial Membranes for Inulin Purification

Fabrication of Ag Nanosheet@TiO₂ Antibacterial Membranes for Inulin Purification

Gas Permeation Characteristics of TiO2-ZrO2-Aromatic Organic Chelating Ligand (aOCL) Composite Membranes

Optimized preparation of MgO-ZrO₂ nanocomposite powders by assisted sol-gel method

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Preparation, characterization, and evaluation of TiO2-ZrO2 nanofiltration membranes fired at different temperatures

Cited by 35 publications

References 43 publications

Fabrication of Ag Nanosheet@TiO2 Antibacterial Membranes for Inulin Purification

Fabrication of Ag Nanosheet@TiO2 Antibacterial Membranes for Inulin Purification

Gas Permeation Characteristics of TiO2-ZrO2-Aromatic Organic Chelating Ligand (aOCL) Composite Membranes

Optimized preparation of MgO-ZrO2 nanocomposite powders by assisted sol-gel method

Contact Info

Product

Resources

About

Fabrication of Ag Nanosheet@TiO₂ Antibacterial Membranes for Inulin Purification

Fabrication of Ag Nanosheet@TiO₂ Antibacterial Membranes for Inulin Purification

Optimized preparation of MgO-ZrO₂ nanocomposite powders by assisted sol-gel method